Weekly Volcanic Report

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Rich

SI / USGS Weekly Volcanic Activity Report

  • Wed, 20 Oct 2021 02:32:40 -0600: Pavlof (United States) - Report for 13 October-19 October 2021 - Smithsonian / USGS Weekly Volcanic Activity Report

    AVO reported that the eruption at Pavlof continued during 13-19 October and was focused at a vent on the upper SE flank, near the location of the 2007 vent. Seismicity remained elevated. Two small explosions were recorded in infrasound and seismic data on both 14 and 16 October. A few explosions were recorded during 17-18 October; ash deposits on the flanks were visible in satellite images. Cloudy conditions obscured satellite and webcam images most days. The Volcano Alert Level and Aviation Color Code remained at Watch and Orange, respectively.

    Source: US Geological Survey Alaska Volcano Observatory (AVO)

  • Wed, 20 Oct 2021 02:32:40 -0600: Asosan (Japan) - Report for 13 October-19 October 2021 - NEW - Smithsonian / USGS Weekly Volcanic Activity Report

    According to JMA the number of volcanic tremor signals at Asosan began on 12 October. Tremor amplitude began increasing at 1530 on 13 October, prompting JMA to raise the Alert Level to 2 (on a scale of 1-5) almost two hours later. White plumes rose 1.4 km above Nakadake Crater. An eruption was detected at 0443 on 14 October; weather clouds prevented visual confirmation of an eruption plume, though ejected incandescent material was visible in thermal camera images. During a field visit to the volcano later that day, scientists confirmed ashfall in several areas, including parts of Takamori Town (Kumamoto Prefecture), Taketa City (Oita Prefecture), and Takachiho Town (Miyazaki Prefecture). Small eruptive events occurred at 1057 and 1325 on 15 October. Volcanic tremor amplitude increased at 1400 on 18 October. During an overflight scientists observed ash deposits extending SE from Nakadake Crater. Volcanic tremor amplitude continued to fluctuate at high levels on 19 October. At 1143 on 20 October a notable eruption ejected blocks 900 m S and produced an ash plume that rose 3.5 km above the crater rim and drifted E. Pyroclastic flows descended 1.3 km W. The Alert Level was raised to 3 at 1148 and warned the public to stay 2 km away from Nakadake Crater.

    Source: Japan Meteorological Agency (JMA)

  • Wed, 20 Oct 2021 02:32:40 -0600: Karymsky (Russia) - Report for 13 October-19 October 2021 - Smithsonian / USGS Weekly Volcanic Activity Report

    A thermal anomaly over Karymsky was identified in satellite images during 8-9 October. On 19 October KVERT lowered the Aviation Color Code to Yellow (the second lowest level on a four-color scale), noting that only gas-and-steam emissions persisted after the last ash explosions were recorded on 25 September. On 20 October explosions generated ash plumes that rose as high as 4 km (13,100 ft) a.s.l. and drifted almost 90 km ENE. KVERT raised the Aviation Color Code to Orange.

    Source: Kamchatkan Volcanic Eruption Response Team (KVERT)

  • Wed, 20 Oct 2021 02:32:40 -0600: Sheveluch (Russia) - Report for 13 October-19 October 2021 - Smithsonian / USGS Weekly Volcanic Activity Report

    KVERT reported that a thermal anomaly over Sheveluch was identified in satellite images during 8-15 October. The Aviation Color Code remained at Orange (the second highest level on a four-color scale).

    Source: Kamchatkan Volcanic Eruption Response Team (KVERT)

  • Wed, 20 Oct 2021 02:32:40 -0600: Taal (Philippines) - Report for 13 October-19 October 2021 - Smithsonian / USGS Weekly Volcanic Activity Report

    PHIVOLCS reported that upwelling of hot volcanic fluids in Taal?s crater lake was visible during 13-18 October, and gas-and-steam plumes rose 1.2-3 km above the lake and drifted in multiple directions. Sulfur dioxide emissions averaged 6,393-12,611 tonnes/day, though on 15 October the emissions peaked at 23,576 tonnes/day, which was the second highest ever sulfur dioxide gas flux recorded at the volcano. Dense vog spread over the Taal Caldera region was noted on 15 October. Earthquake activity resumed on 11 October after a brief lull that first began on 27 September; 145 events characterized as mostly weak low-frequency earthquakes and volcanic tremor were recorded during 11-15 October. Volcanic tremor persisted through 18 October. The Volcano Alert Level remained at a 2 (on a scale of 0-5). PHIVOLCS reminded the public that the entire Taal Volcano Island is a Permanent Danger Zone (PDZ) and that boating on Taal Lake was prohibited.

    Source: Philippine Institute of Volcanology and Seismology (PHIVOLCS)

  • Wed, 20 Oct 2021 02:32:40 -0600: Pagan (United States) - Report for 13 October-19 October 2021 - NEW - Smithsonian / USGS Weekly Volcanic Activity Report

    The U.S. Geological Survey reported that ash and sulfur dioxide emissions from Pagan were last detected on 6 September. The Aviation Color Code and the Volcano Alert Level were both lowered to Unassigned on 24 September; Pagan is monitored with satellite imagery, distal geophysical data, and mariner reports and not ground-based instruments.

    Source: US Geological Survey

  • Wed, 20 Oct 2021 02:32:40 -0600: Erta Ale (Ethiopia) - Report for 13 October-19 October 2021 - Smithsonian / USGS Weekly Volcanic Activity Report

    During 15 September-15 October satellite data showed thermal anomalies of variable intensities in Erta Ale?s S pit crater and occasional thermal anomalies at the N pit. An anomaly was detected in the N, NW, and W parts of the N pit crater on 15 October.

    Source: Sentinel Hub

  • Wed, 20 Oct 2021 02:32:40 -0600: Rabaul (Papua New Guinea) - Report for 13 October-19 October 2021 - NEW - Smithsonian / USGS Weekly Volcanic Activity Report

    On 6 October RVO raised the Alert Level for Rabaul to Stage 1 (the lowest level on a four-stage scale) due to ongoing deformation and recent increases in seismicity. During the month of September, the seismic network detected a total of 22 high-frequency volcano-tectonic earthquakes, which was more than the 12 recorded in August. The earthquakes were distributed in the Beehives, Vulcan, Greet Harbour, and Namanula areas. Deformation data from a GPS station located at the S part of Matupit Island showed a continuing trend of uplift, with 39 mm/month in August and 35-39 mm/month in September. Diffuse white fumarolic plumes rose from the crater floor and inner walls.

    Source: Rabaul Volcano Observatory (RVO)

  • Wed, 20 Oct 2021 02:32:40 -0600: Kilauea (United States) - Report for 13 October-19 October 2021 - NEW - Smithsonian / USGS Weekly Volcanic Activity Report

    HVO reported that the summit eruption at Kilauea continued in Halema`uma`u Crater during 12-19 October. A 10-m-wide, horseshoe-shaped spatter rampart had formed around the W vent and was open to the E where lava was feeding the lake. For about 10 hours on 12 October a new vent N of the W vent produced 10-15-m-high lava fountains. Lava fountains from the W vent rose as high as 20 m and fed the lava lake which was 46 m deep by 18 October. The lava lake was not level with the deepest parts measured around the W vent; the W end was 4-5 m higher than the N and S parts of the lake and 12 m higher than the E end. Cooled and crusted parts of the lake?s surface overturned, or ?foundered,? in all parts of the lake except the E part. The sulfur dioxide emission rate was high at 1,600-6,800 tonnes per day during 12-14 and 16-17 October. The Aviation Color Code and the Volcano Alert Level remained at Orange and Watch, respectively.

    Source: US Geological Survey Hawaiian Volcano Observatory (HVO)

  • Wed, 20 Oct 2021 02:32:40 -0600: Vulcano (Italy) - Report for 13 October-19 October 2021 - NEW - Smithsonian / USGS Weekly Volcanic Activity Report

    INGV continued to monitor elevated activity at Vulcano during 12-19 October. Scientists collected temperature, water chemistry, and gas-emissions data from four fumarolic vents located inside La Fossa Crater near the rim and from one vent near the beach. According to news articles, elevated levels of carbon dioxide impacted nearby residents in Porto Levante causing a few families to leave their homes on 13 October. Several residents had reported inexplicable illnesses and some deaths of domestic animals the previous week. On 14 October authorities restricted public access to the crater. The Dipartimento della Protezione Civile maintained the Alert Level at Yellow (the second lowest level on a four-color scale).

    Sources: Dipartimento della Protezione Civile,la Repubblica,la Repubblica,la Repubblica,Sezione di Catania - Osservatorio Etneo (INGV)

  • Wed, 20 Oct 2021 02:32:40 -0600: Aira (Japan) - Report for 13 October-19 October 2021 - Smithsonian / USGS Weekly Volcanic Activity Report

    JMA reported that incandescence from Minamidake Crater (at Aira Caldera?s Sakurajima volcano) was visible at night during 11-18 October. The sulfur dioxide emission rate was 800 tons per day on 11 October. A very small eruptive event was recorded on 14 October. The Alert Level remained at 3 (on a 5-level scale), and residents were warned to stay 2 km away from the crater.

    Source: Japan Meteorological Agency (JMA)

  • Wed, 20 Oct 2021 02:32:40 -0600: Bagana (Papua New Guinea) - Report for 13 October-19 October 2021 - Smithsonian / USGS Weekly Volcanic Activity Report

    The Darwin VAAC reported that on 14 October an ash plume from Bagana rose to 2.1 km (7,000 ft) a.s.l. and drifted NE based on satellite and wind model data.

    Source: Darwin Volcanic Ash Advisory Centre (VAAC)

  • Wed, 20 Oct 2021 02:32:40 -0600: Semeru (Indonesia) - Report for 13 October-19 October 2021 - Smithsonian / USGS Weekly Volcanic Activity Report

    PVMBG reported that gray-and-white emissions rose 200-500 m above Semeru?s summit and drifted SW, W, and N during 12-13 and 15-16 October. Weather clouds often prevented visual observations of the summit. The Alert Level remained at 2 (on a scale of 1-4), with a general exclusion zone of 1 km and extensions to 5 km in the SSE sector.

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

  • Wed, 20 Oct 2021 02:32:40 -0600: Krysuvik-Trolladyngja (Iceland) - Report for 13 October-19 October 2021 - Smithsonian / USGS Weekly Volcanic Activity Report

    Icelandic Meteorological Office (IMO) reported that during 18 September-18 October no lava effusion was detected at the Kr�suv�k-Tr�lladyngja volcanic system. The seismic swarm that had begun on 26 September in an area SW of Keilir (about 10 km NE of the fifth vent), at the N end of the dike intrusion, had significantly decreased in mid-October. The Aviation Color Code was lowered to Yellow (the second lowest level on a four-color scale) on 18 October. IMO noted that gas emissions were ongoing, though with very low concentrations of eruptive gases. Minor thermal anomalies were detected less often; incandescence from previously emplaced lava flows was occasionally visible at night. IMO also stated that residual heat, gases, and incandescence may continue for weeks to months.

    Source: Icelandic Meteorological Office (IMO)

  • Wed, 20 Oct 2021 02:32:40 -0600: Ebeko (Russia) - Report for 13 October-19 October 2021 - Smithsonian / USGS Weekly Volcanic Activity Report

    According to volcanologists in Severo-Kurilsk (Paramushir Island), about 7 km E of Ebeko, an explosion on 10 October produced an ash plume that rose as high as 2.5 km (8,200 ft) a.s.l. and drifted NE. The Aviation Color Code remained at Orange (the second highest level on a four-color scale).

    Source: Kamchatkan Volcanic Eruption Response Team (KVERT)


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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 24th year, author of multimedia CDs and DVDs, loves the outdoors, his family, his geeky skill-set, and lives in rural southern Wyoming, just below the continental divide (long story, that...). Always ready to help others, he shares what he learns on multiple blogs, many 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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