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Letusan Gunung Sinabung Sedot Perhatian NASA

SELIDIKI.COM – Gunung Sinabung Kabupaten Karo, Sumatera Utara, mengalami erupsi Senin 19 Februari 2018. Erupsi itu menyemburkan abu vulkanik dengan ketinggian lima kilometer, Sinabung juga menyemburkan awan panas hingga ketinggian 4,9 kilometer. Akibat semburan letusan dahsyat ini, lima wilayah sempat dilanda kegelapan.

Erupsi Gunung Sinabung mendapat perhatian dari Badan Antariksa Amerika Serikat. Dikutip dari Earth Observatory NASA, Kamis 22 Februari 2018, beberapa jam setelah Gunung Sinabung erupsi, instrumen Moderate Resolution Imaging Spectroradiometer (Modis) pada satelit Terra NASA mengabadikan gambar alami dari erupsi tersebut.

Violent Blast from Sinabung Indonesia’s Mount #Sinabung has been sporadically active since 2010, following four centuries of quiet. On February 19, 2018, the #stratovolcano on the island of #Sumatra erupted violently, spewing ash at least 5 to 7 kilometers (16,000 to 23,000 feet) into the air over #Indonesia. At 11:10 a.m. local time (04:10 Universal Time) on February 19, the Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA’s Terra satellite captured a natural-color image of the eruption, just a few hours after it began. According to reporting from the Associated Press, the erupting lava dome obliterated a chunk of the peak as it erupted. Plumes of hot gas and ash rode down the volcano’s summit and spread out in a 5-kilometer (3 mile) diameter, while ash falls were recorded as far away as the town of Lhokseumawe, some 260 kilometers (160 miles) to the north. Villages were coated in ash, and airline pilots were given the highest alert for the region. Government officials handed out face masks to the citizens of the island and advised them to stay indoors due to the potentially dangerous air quality. As volcanologist and blogger Erik Klemetti put it: “breathing volcanic ash is a significant health hazard—the ash is really small shards of glass, so it can abrade your lungs and form a ‘cement.’” The volcanic plume also contained sulfur dioxide (SO2), which can irritate the human nose and throat when breathed in. The gas reacts with water vapor in the atmosphere to produce acid rain, and it also can react with other gases to form aerosol particles that cause haze and, in extreme events, climate cooling. Other sensors on NASA satellites have also been monitoring Sinabung. According to data from CALIPSO, some debris and gas from the eruption appear to have risen 15 to 18 kilometers in the atmosphere. Volcanologist Simon Carn of Michigan Tech also noted via Twitter that the OMI instrument on the Aura satellite had recently detected rising SO2 emissions around Sinabung, a sign that fresh magma was approaching the surface. https://go.nasa.gov/2on7Ohx #volcano #eruption #mountsinabung

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Sensor lainnya dari satelit NASA dan Badan Antariksa Prancis (CNES) juga memantau Gunung Sinabung.

Data dari satelit NASA dan CNES, Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation (CALIPSO) menunjukkan puing dan gas dari erupsi Gunung Sinabung. Muntahan material erupsi itu naik 15-18 kilometer di atmosfer.

Baca juga: Gunung Sinabung Semburkan Letusannya Sejauh 4,6 Km

Satelit lainnya yakni satelit Suomi-NPP, juga memantau material yang keluar ke atmosfer. Satelit yang dioperasikan NASA, Badan Atmosfer dan Kelautan AS (NOAA) serta Departemen Pertahanan AS itu mengabadikan gas sulfur dioksida (SO2) yang terbang ke atmosfer. Dalam peta yang dirilis satelit Suomi-NPP, terlihat instrumen Ozone Mapper Profiler Suite mengabadikan konsentrasi SO2 terdeteksi Senin siang 19 Februari 2018 pukul 13.20 WIB.

Peta gas sulfur dioksida

Gas itu keluar dari erupsi dan berbahaya bagi warga. Jika kontak langsung, gas itu bisa mengiritasi hidung dan tenggorokan saat terhirup.

Saat di atmosfer, SO2 bereaksi dengan uap air dan menghasilkan hujan asam. Gas itu juga bisa bereaksi dengan gas lain untuk membentuk partikel aerosol yang menyebabkan kabut dan kejadian ekstrem yakni pendinginan iklim.

Baca juga: Abu Vulkanik Gunung Sinabung Sampai Aceh, Bandara Disiram, Penerbangan Tertunda

—Viva—

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