Weekly Volcanic Report

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Rich

SI / USGS Weekly Volcanic Activity Report

  • Wed, 01 Apr 2020 02:58:02 -0600: Karangetang (Indonesia) - Report for 25 March-31 March 2020 - Smithsonian / USGS Weekly Volcanic Activity Report

    PVMBG reported that during 23-29 March lava continued to effuse from Karangetang?s Main Crater (S), traveling as far as 1.8 km down the Nanitu, Pangi, and Sense drainages on the SW and W flanks. Sometimes dense white plumes rose up to 75 m above the summit; foggy weather occasionally prevented observations. Incandescence from both summit craters was visible at night. The Alert Level remained at 2 (on a scale of 1-4).

    Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

  • Wed, 01 Apr 2020 02:58:02 -0600: Ebeko (Russia) - Report for 25 March-31 March 2020 - Smithsonian / USGS Weekly Volcanic Activity Report

    Volcanologists in Severo-Kurilsk (Paramushir Island), about 7 km E of Ebeko, observed explosions during 24-25 March that sent ash plumes up to 2.5 km (8,200 ft) a.s.l. Ash plumes drifted NE and W. The Aviation Color Code remained at Orange (the second highest level on a four-color scale).

    Source: Kamchatkan Volcanic Eruption Response Team (KVERT)

  • Wed, 01 Apr 2020 02:58:02 -0600: Nevados de Chillan (Chile) - Report for 25 March-31 March 2020 - Smithsonian / USGS Weekly Volcanic Activity Report

    The Buenos Aires VAAC reported that during 25 and 29-31 March ash plumes from Nevados de Chill�n rose to altitudes of 3.7-5.5 km (12,000-18,000 ft) a.s.l. and drifted SE.

    Source: Buenos Aires Volcanic Ash Advisory Center (VAAC)

  • Wed, 01 Apr 2020 02:58:02 -0600: Shishaldin (United States) - Report for 25 March-31 March 2020 - Smithsonian / USGS Weekly Volcanic Activity Report

    AVO reported elevated seismicity at Shishaldin during 25-31 March characterized by continuous low-level tremor. Steam-and-gas plumes rising from the summit crater were occasionally recorded by the webcam and identified in satellite images. Weakly- to- moderately elevated surface temperatures were identified in satellite images during 29-30 March. The Volcano Alert Level remained at Watch and the Aviation Color Code remained at Orange.

    Source: US Geological Survey Alaska Volcano Observatory (AVO)

  • Wed, 01 Apr 2020 02:58:02 -0600: Reykjanes (Iceland) - Report for 25 March-31 March 2020 - NEW - Smithsonian / USGS Weekly Volcanic Activity Report

    There were more than 6,000 earthquakes recorded beneath the Reykjanes peninsula as of 26 March, making this period of unrest the largest seismic crisis ever recorded in this part of the country since digital monitoring started in 1991, according to IMO. The seismicity occurred across three main volcanic systems: Eldey, Reykjanes-Svartsengi, and Kr�suv�k. Uplift continued to be detected in the Thorbjorn area totaling about 70-80 mm; the deformation rate was lower than in January and February. Deformation modeling suggested that recent inflation was caused by a second magmatic intrusion at a depth of 3-4 km in an area W of Thorbjorn, close to the intrusion that occurred at the beginning of the year. GPS data suggested a small deformation pattern detectable over a regional area, far beyond the Thorbjorn area.

    Source: Icelandic Met Office (IMO)

  • Wed, 01 Apr 2020 02:58:02 -0600: Ibu (Indonesia) - Report for 25 March-31 March 2020 - Smithsonian / USGS Weekly Volcanic Activity Report

    PVMBG reported that at 1730 on 26 March, at 0642 on 28 March, and at 0855 on 29 March gray ash plumes rose 600 m above Ibu?s summit and drifted W and N. The Darwin VAAC stated that on 30 March an ash plume rose to 2.1 km (7,000 ft) a.s.l. and drifted NE based on satellite images and weather models. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater, and 3.5 km away on the N side.

    Sources: Darwin Volcanic Ash Advisory Centre (VAAC),Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

  • Wed, 01 Apr 2020 02:58:02 -0600: Kerinci (Indonesia) - Report for 25 March-31 March 2020 - NEW - Smithsonian / USGS Weekly Volcanic Activity Report

    The Darwin VAAC reported that on 25 March an ash plume from Kerinci rose to 4.3 km (14,000 ft) a.s.l. and drifted WSW based on information from PVMBG. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to remain outside of the 3-km exclusion zone.

    Sources: Darwin Volcanic Ash Advisory Centre (VAAC),Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

  • Wed, 01 Apr 2020 02:58:02 -0600: Klyuchevskoy (Russia) - Report for 25 March-31 March 2020 - Smithsonian / USGS Weekly Volcanic Activity Report

    KVERT reported that Strombolian activity at Klyuchevskoy was visible during 20-27 March, and a bright thermal anomaly was identified in satellite images those same days. Vulcanian activity was visible on 20 and 25 March; ash plumes drifted as far as 180 km E and NE at altitudes of 5.5-6 km (18,000-19,700 ft) a.s.l. on those same days. The Aviation Color Code remained at Orange.

    Source: Kamchatkan Volcanic Eruption Response Team (KVERT)

  • Wed, 01 Apr 2020 02:58:02 -0600: Semeru (Indonesia) - Report for 25 March-31 March 2020 - NEW - Smithsonian / USGS Weekly Volcanic Activity Report

    PVMBG reported that during 23-29 March white plumes rose 100 m above Semeru?s summit. Incandescent material was ejected 20 m above the Jonggring-Seloko Crater. Incandescent material from the ends of lava flows descended 200-500 m, reaching a maximum distance of 750 m from the crater. The Alert Level remained at 2 (on a scale of 1-4), and the public was reminded to stay outside of the general 1-km radius from the summit and 4 km on the SSE flank.

    Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

  • Wed, 01 Apr 2020 02:58:02 -0600: Merapi (Indonesia) - Report for 25 March-31 March 2020 - Smithsonian / USGS Weekly Volcanic Activity Report

    BPPTKG reported that beginning at 1056 on 27 March a seven-minute-long eruption at Merapi produced an ash plume that rose 5 km above the crater rim and pyroclastic flows that descended the SSE flank as far as 2 km. The ash plume drifted mainly SW and caused ashfall within 20 km, particularly in areas to the W and including the Mungkid subdistrict and in Banyubiru Village. The report noted that there were no clear precursors for the eruption. Eruptions at 2146 on 27 March and at 0521 the next day generated ash plumes that rose 1 km and 2 km, respectively. Each lasted about 2 minutes and 40 seconds based on the seismic data. Minor ashfall was noted in areas within 5 km, especially to the W, including Krinjing subdistrict. The Alert Level remained at 2 (on a scale of 1-4), and residents were warned to stay outside of the 3-km exclusion zone.

    Source: Balai Penyelidikan dan Pengembangan Teknologi Kebencanaan Geologi (BPPTKG)

  • Wed, 01 Apr 2020 02:58:02 -0600: Semisopochnoi (United States) - Report for 25 March-31 March 2020 - Smithsonian / USGS Weekly Volcanic Activity Report

    AVO reported that seismicity at Semisopochnoi remained elevated during 25-31 March and no surface activity was observed on most days, though weather clouds often prevented visual confirmation. The Aviation Color Code remained at Orange and the Volcano Alert Level remained at Watch.

    Source: US Geological Survey Alaska Volcano Observatory (AVO)

  • Wed, 01 Apr 2020 02:58:02 -0600: San Miguel (El Salvador) - Report for 25 March-31 March 2020 - Smithsonian / USGS Weekly Volcanic Activity Report

    SNET stated that during 30-31 March the seismic network at San Miguel recorded a period of increased seismicity characterized by continuous, low-frequency, tremor-type signals. RSAM values were between 90 and 116 units, lower than the normal values of 150, at a seismic station located on the upper N flank.

    Source: Servicio Nacional de Estudios Territoriales (SNET)

  • Wed, 01 Apr 2020 02:58:02 -0600: Aira (Japan) - Report for 25 March-31 March 2020 - Smithsonian / USGS Weekly Volcanic Activity Report

    JMA reported that during 23-30 March incandescence from Minamidake Crater (at Aira Caldera?s Sakurajima volcano) was visible nightly. Twelve eruptive events were recorded along with three explosions during 23-27 March. An eruption at 1041 on 27 March produced an ash plume that rose 1.8 km above the crater rim and ejcted material 800-1,100 m away from the crater. The Alert Level remained at 2 (on a 5-level scale).

    Source: Japan Meteorological Agency (JMA)

  • Wed, 01 Apr 2020 02:58:02 -0600: Sheveluch (Russia) - Report for 25 March-31 March 2020 - Smithsonian / USGS Weekly Volcanic Activity Report

    KVERT reported that a thermal anomaly over Sheveluch was identified in satellite images during 20-27 March. A gas-and-steam plume containing some ash drifted 45 km N on 25 March. The Aviation Color Code remained at Orange (the second highest level on a four-color scale).

    Source: Kamchatkan Volcanic Eruption Response Team (KVERT)

  • Wed, 01 Apr 2020 02:58:02 -0600: Suwanosejima (Japan) - Report for 25 March-31 March 2020 - Smithsonian / USGS Weekly Volcanic Activity Report

    JMA reported that during 19-27 March incandescence from Suwanosejima?s Ontake Crater was visible nightly. One explosion was recorded on 23 March and eruptive events were detected during 23-24 March; ringing sounds were noted in a village 4 km SSW. Gray-white plumes rose 700 m above the crater rim on 24 March. The Alert Level remained at 2 (on a 5-level scale).

    Source: Japan Meteorological Agency (JMA)


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Updated: March 12, 2011 — 12:36 pm

The Author

Rich Fleetwood

Rich is the founder of SurvivalRing, now in it's 20th year, author of multimedia CDs and DVDs, loves the outdoors, his family, his geeky skill-set, and lives in rural Missouri, just a few miles from the Big Muddy. Always ready to help others, he shares what he learns on multiple blogs, social sites, and more. With a background in preparedness and survival skills, training with county, state, and national organizations, and skills in all areas of media and on air experience in live radio and television, Rich is always thinking about the "big picture", when it comes to helping individuals and families prepare for life's little surprises.

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