mt etna eruption 2021 deaths

A risk we took into account for part 15 of our series "Extreme Places". Seismic activity in the area continued in the following days. A pyroclastic flow is extremely hot, burning anything in its path. Sicilians have become accustomedto life under constant threat of volcanic eruption. Mount Etna in Sicily has erupted for the first time this year. On the Edge: NASAs Last S-MODE Mission Studies the Oceans Surface. The name Etna derives from the Greek Aitne, meaning "I burn". Updated: 02/03/2021 - 12:36 Mount Etna, Europe's most active volcano, erupts seven times in two weeks Living near the volcano is no easy task for locals, as they have The call came from the headquarters of the INGV where, a few seconds before that disturbance, seismic waves on one of the 40 monitors in the operations room seemed to jump off the screen. Lava samples mounted on a slide for microscope measurements at the volcanology institute. It remains one of the worlds most active volcanoes today. Italys Mount Etna, Europes most active volcano, erupted on Tuesday, creating a fountain of lava and sending plumes of orange smoke into the sky. Sometimes, like in recent days, lava stones rain down on streets, bounce off cars and rattle roofs. A vulcanologist for the ministry, Franco Barberi, said that immediately following the explosion there was intense activity with the emission of vapors from the crater, but that Saturday the crater was nearly closed up again and emitting only a small amount of gas. The Strombolian activity projected a high dark cloud over Catania and the nearby villages. Spectacular explosive interactions have been observed between lava flows and snow; which on several occasions have produced phenomena extremely similar to pyroclastic flows. The current activity principally involves the south-east crater, which was created in 1971 from a series of fractures. Over the last century, a hiccup in geological time, low-energy explosive eruptions and lava flows, both fed from the summit and side vents, have characterized Etna. Getting there: Fly to Catania, then take a rental car or coach to one of the two mountain stations which are the starting points for tours. Then a second lava stream overflows outwards, expanding in a southwest direction. It occurs as part of certain volcanic eruptions. But for pilots and passengers flying to and from Catania at night when the volcano is calmer, a glimpse of fiery red in the dark sky makes for an exciting sight. But many residents generally find that a small inconvenience when weighed against the benefits the volcano brings. The volcano has belched out ash and lava stones that showered the southern side. During the Middle Ages and Renaissance, Etnas clear dangers left many scholars content to rely on the observations of ancient authors rather than risk roasting in a close look for themselves. A pyroclastic flow is a dense, fast-moving flow of solidified lava pieces, volcanic ash, and hot gases. For three days the Guardian had access to the rooms of the INGV in the Piazza Roma, Catania, where day and night 100 Italian scientists monitor Etnas movements in an attempt to explain these recent phenomena. Between the paroxysms of 16th, 18th and 19th of February 2021; thirty hours had always passed, as if to believe that the next interval would also be of that duration, and that the new paroxysm. Workers near the village of Zafferana Etnea clean volcanic sand from the main streets. At 1:37 a.m. local time (00:37 Universal Time) on February 23, 2021, the Visible Infrared Imaging Radiometer The U.S. science team is located at NASA's Jet Propulsion Laboratory in Pasadena, Calif. Etna, 3,300 (10,800ft) metres above sea level, has been in explosive form in recent weeks, spewing incandescent magma and a copious shower of ash that has reached as far as Catania. Shortly, after 01:00 am on February 18th, the explosive activity showed a sudden intensification. Updated: 30/08/2021 - 13:48 Mount Etna spews lava, plumes of ash in Sicily Mount Etna in Sicily erupted on Sunday, spewing lava flows and sending up plumes of ash. Language links are at the top of the page across from the title. Mount Etna erupted several times on Tuesday, causing the closure of a nearby airport. All rights reserved. Early in this recent spell of eruptive activity, the airport closed briefly. We've received your submission. Recent Eruptions on Mount Etna Alan Taylor February 22, 2021 20 Photos In Focus Mount Etna has erupted four times in the past six days, sending lava down its JPL is a federally funded research and development center managed for The eruption forced Sicilys Catania Airport to temporarily close which often happens when the volcano is active. Lava samples melted and transformed into glass discs for X-ray fluorescence analysis. Read about our approach to external linking. The two lava flows poured into the Valle del Bove, the wide caldera covering the eastern flank of the volcano. The rockfall raised a large cloud of gas and pyroclastic material that rapidly reached Catania and the nearby towns. At 1:28 am, the paroxysm enters a phase of extraordinary intensity. A joint U.S./Japan science team is responsible for validation and calibration of the instrument and data products. After all, the volcano is also a blessing for the Mediterranean island and its residents. The Sicilian village was in emergency mode, the mayor said, as residents and municipal teams worked to clean up the ashes on the street Wednesday. In the early hours of February 18th 2021, nearly thirty hours after the paroxysm of February 16th, the Southeast Crater of Mount Etna took of again with a new eruption. Nevertheless, the power of the fire-breathing giant could clearly be felt. In mid-January 2011, Europes largest and most active volcano, Mount Etna, rumbled with new energy and lit up the Sicilian night with a fountain of lava. On October 31, 2005, Agenzia Giornalistica Italia reported that 15 tremors had been recorded near Mount Etna by the morning of October 30, followed by 20 more shocks over the next day. This website uses cookies to improve your experience. The Game That Hasn't Aged: Sunset Overdrive, PlayStation 5 Buying Guide (Hindi+English): All Details To Know Before Buying Your FIRST PS in 2022, Marvels Spider-Man Remastered PC Game Review, 'Highest Ever': 900 climbers to attempt Everest Summit in 2023, ET becomes real? The eruption injured seven people in the group of 30 French, Italian and German tourists, but none was in serious condition. Later they divided and slowed down to finally finishing their slow run at around 1.600 meters above sea level. Eruptions distinguished by violent explosions of Strombolian type. The airports security unit suspended all operations due to the emergency linked to the volcanic ash cloud. Video, 00:00:56French cities witness violence in May Day demonstrations, Swiss TV host challenges man gluing himself to podium. NASA/METI/AIST/Japan Space Systems, and U.S./Japan ASTER Science Team, Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER). Something I never saw in my entire life.. WebAn eruption in 1169 resulted in 15,000 deaths; five centuries later, another eruption resulted in 20,000 deaths. Admission: free, but you are only allowed to walk restricted areas of the park without a guide or as part of a guided tour. Shortly before 09:00 pm, a small lava flow began to emerge from the eastern vent of the S.E. But this is just a last goodbye after this magnificent paroxysm; one of the most spectacular and powerful eruption that we have been seeing on Mount Etna past activities. Several lava flows developed from the crater, spreading east, north-east and south-west. But opting out of some of these cookies may have an effect on your browsing experience. During the Middle Ages and Renaissance, Etnas clear dangers left many Video, 00:00:35, Drone captures moment lost child is found, Watch: Massive flames rise from Crimea oil tank. At this time, the volcanos recent activity doesnt suggest that there will be a flank eruption, says Stefano Branca, the director of the INGV in Catania. Special tip: Experience the volcano from a different perspective with the historic narrow gauge railway Ferrovia Circumetnea. Theres no telling how long this round of exciting activity will last, say volcanologists who work at the Etna Observatory run by the National Institute of Geophysics and Volcanology. It was a rain of stones, resident Letizia Olivieri told the Associated Press. Mount Etna in Sicily, southern Italy, has roared back into spectacular volcanic action, sending up plumes of ash and spewing lava. Volcanoes, Ash and gas presage a paroxysm (small eruption) at Italys Mount Etna. When his phone rang at 3.22am last Wednesday, 50-year-old Giuseppe Salerno, the head of volcanologists at Catanias National Institute of Geophysics and Volcanology (INGV), was already up after a thundering rumble had awoken many of the citys inhabitants. Thick ash clouds the sky as Etna erupts. In 1992, the army built an earthen wall to contain the lava, flowing from Etna for months, from hitting Zafferana Etnea, a village of a few thousand people. Etnas eruption seen from the village of Monterosso. Yet this is not a static environment, as the picture changes significantly with every eruption. No injuries or deaths have been reported. The recent activity is part of a so-called lava fountaining that is among Etnas normal activities, says Salerno, a former PhD researcher at Cambridge Universitys department of geography. Lava flows have left fertile farmland. It may move at speeds as high as 200 m/s. For the past few days, Mount Etnas almost preternatural displays of liquid hot rage had come along like clockwork, spaced roughly 30 hours apart on the 16th, 18th, and 19th of February 2021. Other scenarios cannot be excluded, however. With Etnas lava flows largely contained to its uninhabited slopes, life goes in towns and villages elsewhere on the mountain. Video, 00:00:45Mount Etna: Mesmerising pictures of latest eruption, Volcanoes: Living in Mount Etna's shadow. Find out what he experienced on his hike between lava fields in our video. We also use third-party cookies that help us analyze and understand how you use this website. More recently, in 1983, dynamite was used to divert lava threatening inhabited areas. It could be that at a certain point this valve may no longer function efficiently. This category only includes cookies that ensures basic functionalities and security features of the website. Episode 5 Radhika Apte - Her Moods, Her Make-up and Her Movies, Best Camera Phones Between 10000 To 20000, Best Android Phones Between 10000 to 20000. A notable exception was the German Jesuit polymath Athanasius Kircher, who witnessed one of Etnas violent eruptions in 1630. Video, 00:00:47, Man does worm as Rita Ora sings, she loves it, Armed heist at Paris luxury jewellery store in daylight. Rosanna Corsaro in the petroteca, a room storing old volcanic rock samples from Etna at the volcanology institute. But each time it roars back into dramatic action, it wows onlookers and awes geologists who spend their careers monitoring it's every quiver, rumble and belch. Mount Etna, one of the world's most active volcanoes, belched smoke and ashes in a new eruption on Tuesday, but Italian authorities said it posed no danger to the On the morning of February 19th, 2021, the Southeast Crater of Etna produced a third eruption within a few days. Accompanying the series, the book 111 Extreme Places in Europe That You Shouldn't Misswas published in cooperation with Emons Verlag. The flaming lava lights up the night sky in shocking hues of orange and red. What is really peculiar is that the volcano is behaving like a machine, with rhythms that have almost a mathematical precision. The mountain grows or shrinks as rocks shift on the edge of the crater. In 1669, in what has been considered the volcanos worst known eruption, lava buried a swath of Catania, about 23 kilometres (15 miles) away and devastated dozens of villages. The image was acquired February 17, 2021, covers an area of 38 by 39 km, and is located at 37.8 degrees north, 15 degrees east. On October 28, 2005, the Moderate Resolution Imaging Spectroradiometer (MODIS) flying onboard the Terra satellite captured this image as the volcano emitted a faint plume of volcanic ash that blew westward away from the summit. Etna is Europe's most active volcano, and it erupts relatively often. | Volcano World | Oregon State University", "Galunggung | Volcano World | Oregon State University", "Tseax Volcano: A Deadly Basaltic Eruption in North-Western British Columbia's Stikine Volcanic Belt", "Looking Back at the 1982 eruption of el Chichn in Mexico", "St. Vincent volcano is now less active (1902)", "Mayon Volcano | Eruption, History, & Facts | Britannica", "BBC:On this day: November 13: 1985: Volcano kills thousands in Colombia", Report on Hokkaido-Komagatake (Japan) September 1998, "Conred cifra en 332 el nmero de desaparecidos por erupcin volcnica", "Paluweh volcano eruptions - eruptive history, info / VolcanoDiscovery", "INHABITANTS OF ISLAND ALL KILLED BY VOLCANO:; The 150 Japanese Residents of Torishima Dead Eruption Still Proceeding", Report on Dieng Volcanic Complex (Indonesia) March 1979, "Kolumbo submarine volcano (Greece): An active window into the Aegean subduction system", "Japan's Sakurajima volcano due for major eruption within 30 years, say scientists", "Report on Kelud (Indonesia) January 1990", "66. Italys Mount Etna, Europes most active volcano, erupted on Tuesday, creating a fountain of lava and sending plumes of orange smoke into the sky. Experts at the INGV estimate that Etnas main reservoir, and also its largest, is 12km (7.5 miles) underground. Thanks for contacting us. The BBC is not responsible for the content of external sites. 2023 NYP Holdings, Inc. All Rights Reserved, Volcano erupts in Russian far east, carpeting villages in ash, Deadliest volcano in Western Hemisphere shows signs of increased activity, I live on a volcano Im trying to set a world record, Oregon avalanche sweeps snowboarder over volcano cliff to his death: sheriff. Europe at its most extreme: The series "Europe to the Maxx" on DW's lifestyle and culture magazine Euromaxxmakes Europe's superlatives experienceable from extraordinary architecture to spectacular landscapes to unique cultural phenomena. What is really peculiar is that the volcano is behaving like a machine. Photograph: Alessio Mamo, We monitor its every breath: inside Mount Etnas war room. CATANIA, Sicily (AP) _ Magistrates on Saturday were trying to determine how tourists got so close The fountains with their eastern vents now reach heights of many hundreds of meters; the cone of the Southeast Crater is increasingly covered with incandescent pyroclastic material. Mount Etna is positioned at the southern boundary of the Eurasian tectonic platewheretheAfrican tectonic plateslides beneath it. What Makes ANY First Person Shooter Game GOOD? ? There's a fine line between fascination and danger with Etna. The rockfall raised a large cloud of gas and pyroclastic material that rapidly reached Catania and the nearby towns. Video, 00:01:13, Baby meets father for first time after Sudan escape. We acknowledge Aboriginal and Torres Strait Islander peoples as the First Australians and Traditional Custodians of the lands where we live, learn, and work. Read about our approach to external linking. The Civil Defense Ministry in Rome said the eruption came without warning and was possibly touched off by snow melting into craters. The volcano last devastated Catania in 1669 when the lava reached the sea along Siciliys northeastern coast. The south-east crater which has been spewing lava in recent weeks has until now been functioning as a safety valve. Compared to earlier activity, the eruption observed by MODIS on October 28 was fairly mild. Though it covered pseudoscientific topics like dragons and astrology, Mundus Subterraneus was possibly the first printed work on volcanoes and geophysics. Previously, in the late evening of February 17th, the explosive activity gradually intensified, together with an increase of the amplitude of volcanic tremor. For the 12th part of our series "Extreme Places" we payed the region a visit. The mountain's geological characteristics indicate that it has been active since the Neogene Period, 2.6 million years ago. In that case, if the primitive magma continues to rise to the surface, a lateral opening could form.. Popular gadgets including laptop, tablet and mobile specifications, features, prices, comparison. Full of guaranteed record breakers! However, Salerno, whose career has taken him to Klauea in Hawaii and the volcanoes of Central America, explains that the key to unlocking the mystery of Etnas unusually spectacular eruptions is precisely the volcanos ash. The instrument was built by Japan's Ministry of Economy, Trade and Industry. The broad spectral coverage and high spectral resolution of ASTER provides scientists in numerous disciplines with critical information for surface mapping and monitoring of dynamic conditions and temporal change. Its eruptions have rarely caused damage or injury in recent In recent weeks in the town of Giarre alone more than 12,000 tonnes of ash have fallen. People in the town of Giarre use umbrellas as protection against volcanic ash. Who is Vanessa Hudson? Occasionally, the airport at Catania, eastern Sicilys largest city, has to close down for hours or days, when ash in the air makes flying in the area dangerous. The eruptive plume rises over 10 kilometers into the night sky. Its an extremely dramatic situation, an emergency, says Alfio Previter, a council official. When? he adds. This story has been shared 330,784 times. But they have been generated by mechanisms called hydromagmatics or phreatomagmatics, in points far from the eruptive vents. Proper disposal of a cubic metre of volcanic ash costs about 20 (17). For a few minutes, the cone, the fountains, everything disappears under this dark curtain; then, when it is diluted, the cone appears red everywhere, and huge fountains of lava rise exceeding 1000 meters in height. In the extreme southeast of Europe lies Kalmykia, a republic of Russia. Etna volcano engulfed with ashes and smoke near Milo, Sicily. A large fall of ash, but also lapilli of about one centimeter in size. An eruptive column charged with pyroclastic material was formed, which rapidly rose for several kilometers above the summit of Etna. Lava gushes from the Mt Etna volcano near Catania, Sicily, Tuesday, Feb. 16, 2021. 2023 BBC. Such flank eruptions are the ones volcanologists most fear, as lava flows down the sides of the volcano, opening fractures on the low-lying mountains that risk inundating the cities below. Throbbing lava jets spewed out from several points along the fracture. Earth Surface Mineral Dust Source Investigation (EMIT) Mission, NASA-Led Project Tracking Changes to Water, Ecosystems, Land Surface, Scientists Use NASA Satellite Data to Determine Belize Coral Reef Risk, Joint NASA, CNES Water-Tracking Satellite Reveals First Stunning Views, NASA Uses 30-Year Satellite Record to Track and Project Rising Seas, Ranking Atmospheric Rivers: New Study Finds World of Potential, NASA and Italian Space Agency Join Forces on Air Pollution Mission, NASA-ISRO Science Instruments Arrive in India Ahead of 2024 Launch. The route leads from Catania to Riposto in almost a full circumnavigation of Etna. Multiple eruptions over the next few weeks killed more than 20,000 people and left Example applications are monitoring glacial advances and retreats; monitoring potentially active volcanoes; identifying crop stress; determining cloud morphology and physical properties; wetlands evaluation; thermal pollution monitoring; coral reef degradation; surface temperature mapping of soils and geology; and measuring surface heat balance. Around 11:30 pm, a lava flow developed from the eastern vent of the S.East crater, heading towards the caldera Valle del Bove. Through satellite observations it has been estimated that the eruptive column reached a height of over 10 km above sea level. Mount Etna in Sicily has erupted for the first time this year. It is clear, however, that Etna is no stranger to lateral eruptions. Historical records of Etnas activity date back to 1500 BC. In the city of Catania, at the foot of the volcano, scientists are trying to explain its recent unusual behaviour. Event Mount Etna, Europe's highest volcano, erupts four times in six In an underground laboratory of the INGV, Lucia Miraglia, 53, a geologist and volcanologist who has studied Etnas ash under a microscope for the past 20 years, recently made a revealing discovery: Studying the ash thats fallen in recent days, we noticed that it reflects what volcanologists call primitive magma; that is, a magma that comes from the bowels of the mountain and carries a greater charge of gas, which is the reason why we are seeing these strikingly tall lava fountains. Europe's most active volcano located in Sicily, Italy erupted on October 23, according to Reuters. Mount Etna, Europe's highest volcano, erupts four times in six days, Keep up with the latest ASX and business news, Follow our live blog for the latest from the Met Gala. Sept. 19, 2021, at 1:55 p.m. LOS LLANOS DE ARIDANE, Spain (AP) A volcano on Spains Atlantic Ocean island of La Palma erupted Sunday after a weeklong buildup of seismic activity, prompting authorities to speed up evacuations for 1,000 people as lava flows crept toward isolated mountain homes. National Institute of Geophysics and Volcanology. Hikers and backpackers enjoy views of the oft-puffing mountain and the sparkling Ionian Sea below. For the series "Europe to the Maxx" on the lifestyle and culture magazine "Euromaxx", he explored the national park in which Etna is located together with expert mountain guides, of course. According to Italian law, ash collected from the streets and squares, and mixed with other forms of urban waste, is considered a special refuse, which increases the cost of its disposal. The perfect solution to unveil all the beauty behind Etna active volcano and a great option for your next holiday in Sicily. Kircher had himself lowered into the volcanic cone for an inspection, and later published an engraving of the volcano in his two-volume work, Mundus Subterraneus. . During the morning of the 18th, the amplitude of the volcanic tremor began to show a slight increase again. Within about ten minutes, all the explosive activity ended, while a passive emission of ash continued for a while. Beyonesu (Bayonnaise) Rocks (including Myojinsho)", "The victims of Montserrat's volcano tragedy deserve an investigation", "Indonesian volcano Mount Sinabung eruption causes 16 deaths", "Una tragica estate. From here we can monitor its heartbeat with the seismographs or its breathing with the gas detectors., The recent eruptions have provoked some distress for people living on the volcano, with ash rains that have blanketed streets, squares and buildings. Video, 00:00:46, Mount Etna erupts for first time this year, Up Next. Apple and citrus trees flourish. It is mandatory to procure user consent prior to running these cookies on your website. For skiers who want uncrowded slopes, Etnas a favourite. Today's activity comes just a day after a small lava flow appeared at a Video, 00:00:32One-minute World News, Drone captures moment lost child is found. Video, 00:00:47Man does worm as Rita Ora sings, she loves it, Armed heist at Paris luxury jewellery store in daylight. Finally, in the interval between 11:00 pm and midnight, a sustained lava fountain activity can be distinguished; jets reaching just 100 m. Only around 01:00 am on 21st February do we begin to see the first, still weak explosions from a vent further west of those already in operation for hours. Image of the Day When DW reporter Hendrik Welling visited Mount Etna, the mighty volcano was slumbering. Since 16 February, with fastidious precision, every 48 hours the volcano has put on a firework display with lava fountains reaching as high as 2,000 metres. Around Mount Etna in Sicily, you can really get a sense of the power of nature especially as the majestic volcano could erupt at any time. Mount Etna, 3,300 metres high, is the biggest active volcano in Europe, with frequent eruptions recorded in the past 2,700 years. Its most recent eruptions occurred in the spring of 2017 and its last major eruption in the 2008/2009 winter. Video, 00:00:26Unmissable Met Gala moments in under 30 seconds, French cities witness violence in May Day demonstrations. Explosive activity accompanied by abundant ash emission resumed at Etna volcano at 11:15 UTC on December 14, 2021. Inspiring ancient Greek legends, Etna has had scores of known eruptions in its history. The area surrounding Etna seems like the surface of the moon, strewn with huge craters and black boulders. Video, 00:00:33Watch: Flames engulf key bank in Sudan's capital, One-minute World News. This time, Etna gave us moments of suspense, she delayed, she hesitated, she seemed to think about it several times, but then in the end it was unleashed as rarely in the memory of us who have been working on it for decades. An eruptive plume of gas, volcanic ash and lapilli rose up to an altitude of a few kilometers above the volcano. Thick ash clouds the sky as Etna erupts. Link Copied! Volcanic sand covers a square in Milo, one of the villages most affected by the fall of ash from Etna. Well, only God knows when., Original reporting and incisive analysis, direct from the Guardian every morning, 2023 Guardian News & Media Limited or its affiliated companies. The "Ch Gorreana" plantation has been in existence since 1883. The ASTER nighttime thermal infrared data shows the extent of the active lava flows, draped over an older Google Earth image. plural Lapilli, unconsolidated volcanic fragment with a diameter between 4 and 32 mm (0.16 and 1.26 inches) that was ejected during a volcanic explosion. But the most destructive flank eruption occurred in 1669, when lava, accompanied by earthquakes, buried dozens of towns and even reached the sea. According to authorities, the French woman and her 8-year-old child who were killed on Friday were about 500 yards from a crater on the southeast slope of Europes tallest and most active volcano. The Sicilian geophysicist Rosanna Corsaro, who studies Etnas core from INGV headquarters, says: The magma thats been surfacing in these recent eruptions seems to come from about 10km underground., Recently, Etna has been going through a period in which there is a very efficient transfer of magma from deep beneath the surface. After that, one of these explosion caused the subsidence of a small portion of the south-east crater. Get technology news, gadgets reviews & ratings. Sometimes primitive magma eruptions are lateral: that is, when fractures appear on the side of the volcano and give rise to this sort of activity, says Corsaro. This poured down ash and lapilli over Zafferana Etnea and Acireale. Pistachio and almond trees alternate with lemon groves and blossoming meadows of flowers, and many vineyards are also located around Etna, as the soil gives the grapes an intense, mineral taste. The flow stopped a few hours later at an altitude just below 2000 m. In the hours following this paroxysmal episode, sporadic explosions were still observed from both the Southeast Crater and the Voragine Crater. Image credit: Davide Anastasi/LaPresse via AP. This website uses cookies to improve your experience while you navigate through the website. A few hours later, the Southeast Crater awakens once again! Why is Netflix pouring billions into South Korean shows? The first eruptions occurred more than half a million years ago, since when the volcano has demonstrated its power on countless occasions, sometimes destroying whole villages and cities with its liquid rock in the process. We'll assume you're ok with this, but you can opt-out if you wish. An eruption in 1928 cut off a rail route circling the mountains base. Land As a result, this part of Sicily transforms into a green oasis, especially in spring. A statue of Virgin Mary near the main church in Milo, a village not far from the top of Etna, with the lava flow of an eruption in the background. Any cookies that may not be particularly necessary for the website to function and is used specifically to collect user personal data via analytics, ads, other embedded contents are termed as non-necessary cookies. In 2021, the volcano erupted more than 11 times over a three-week period. Several very violent explosions cover the entire cone of the Southeast Crater of incandescent pyroclastic material.

Madison County Superintendent Election, Jujutsu Kaisen Font Generator, Articles M