Smithsonian / USGS Weekly Volcanic Activity Report

















 Activity for the week of 15 November-21 November 2017


The Weekly Volcanic Activity Report is a cooperative project between the Smithsonian's Global Volcanism Program and the US Geological Survey's Volcano Hazards Program. Updated by 2300 UTC every Wednesday, notices of volcanic activity posted on these pages are preliminary and subject to change as events are studied in more detail. This is not a comprehensive list of all of Earth's volcanoes erupting during the week, but rather a summary of activity at volcanoes that meet criteria discussed in detail in the "Criteria and Disclaimers" section. Carefully reviewed, detailed reports on various volcanoes are published monthly in the Bulletin of the Global Volcanism Network.

Name Location Activity
Agung Bali (Indonesia) New
Oraefajokull Iceland New
Sarychev Peak Matua Island (Russia) New

Aira Kyushu (Japan) Ongoing
Bagana Bougainville (Papua New Guinea) Ongoing
Cleveland Chuginadak Island (USA) Ongoing
Dukono Halmahera (Indonesia) Ongoing
Ebeko Paramushir Island (Russia) Ongoing
Kilauea Hawaiian Islands (USA) Ongoing
Kirishimayama Kyushu (Japan) Ongoing
Langila New Britain (Papua New Guinea) Ongoing
Sabancaya Peru Ongoing
Sheveluch Central Kamchatka (Russia) Ongoing
Sinabung Indonesia Ongoing


New Activity/Unrest


Volcano index photo  Agung  | Bali (Indonesia)  | 8.343°S, 115.508°E  | Elevation 2995 m

PVMBG reported that a phreatic eruption at Agung began at 1705 on 21 November, following a low-frequency tremor signal. An ash plume rose 700 m above the crater rim and drifted ESE. The Alert Level remained at 3 (on a scale of 1-4), and the exclusion zones remained intact (at 6 km, and an additional expansion to 7.5 km in the NNE, SE, S, and SW directions).

Sources: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM), Badan Nacional Penanggulangan Bencana (BNPB)



Volcano index photo  Oraefajokull  | Iceland  | 64.05°N, 16.633°W  | Elevation 2010 m

The Icelandic Meteorological Office (IMO) reported that on 17 November the Aviation Color Code for Öræfajökull was raised to Yellow because satellite images and photos showed that a new ice cauldron had formed within the caldera the previous week. The new cauldron was about 1 km in diameter and 15-20 m deep, and signified a recent increase in geothermal activity. Scientists conducted an overflight on 18 November; in addition, while on the ground, they took water samples, measurements of electrical conductivity, and gas levels at the Kvíárjökull outlet-glacier, a valley glacier on the SE flank of Öræfajökull. There was no obvious sign of flooding in the Kvíá river. A sulfur odor, which had been reported for about a week, was also noted. An increase in the seismic activity was recorded for the last few months (the largest earthquake, an M 3.4, occurred on the 3 October), but was low for the past few days. IMO noted that there were no signs of an imminent volcanic eruption, though there was considerable uncertainty about how the situation will evolve.

Source: Icelandic Met Office



Volcano index photo  Sarychev Peak  | Matua Island (Russia)  | 48.092°N, 153.2°E  | Elevation 1496 m

SVERT reported that weak steam-and-gas emissions from Sarychev Peak were observed on 13 November. Weather clouds prevented observations during 14-20 November. The Aviation Color Code remained at Green.

Source: Sakhalin Volcanic Eruption Response Team (SVERT)



Ongoing Activity


Volcano index photo  Aira  | Kyushu (Japan)  | 31.593°N, 130.657°E  | Elevation 1117 m

JMA reported that an explosion at Minamidake summit crater (at Aira Caldera’s Sakurajima volcano) detected at 2207 on 13 November, ejected material as far as 1.3 km. The explosion vibrated structures in Kagoshima and Miyazaki prefectures. Poor weather conditions prevented views of a plume. An explosion at Showa Crater at 0955 on 14 November produced a plume that rose 1.3 km above the crater rim. Another explosion at Minamidake occurred at 2343 on 14 November, generating a plume that rose 1.3 km above the crater rim. Sulfur dioxide flux measured that same day was 1,400 tons per day, up from 400 tons per day on 10 November. Very small events at Minamidake were occasionally detected during 17-20 November. The Alert Level remained at 3 (on a 5-level scale).

Source: Japan Meteorological Agency (JMA)



Volcano index photo  Bagana  | Bougainville (Papua New Guinea)  | 6.137°S, 155.196°E  | Elevation 1855 m

Based on analyses of satellite imagery and model data, the Darwin VAAC reported that during 15-17 November ash plumes from Bagana rose to an altitude of 2.1 km (7,000 ft) a.s.l. and drifted N, SW, SSW, and W.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)



Volcano index photo  Cleveland  | Chuginadak Island (USA)  | 52.825°N, 169.944°W  | Elevation 1730 m

AVO reported that during 15-20 November elevated surface temperatures in Cleveland's summit crater were sometimes identified in satellite data, consistent with lava at or near the surface; weather clouds sometimes prevented observations. No significant eruptive activity was detected by seismic or infrasound sensors. On 14 November a small explosion occurred from a vent in the middle of the dome. The Aviation Color Code remained at Orange and the Volcano Alert Level remained at Watch.

Source: US Geological Survey Alaska Volcano Observatory (AVO)



Volcano index photo  Dukono  | Halmahera (Indonesia)  | 1.693°N, 127.894°E  | Elevation 1229 m

Based on analyses of satellite imagery, wind model data, and notices from PVMBG, the Darwin VAAC reported that during 15-21 November ash plumes from Dukono rose to altitudes of 2.1-2.3 km (7,000-8,000 ft) a.s.l. and drifted in multiple directions.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)



Volcano index photo  Ebeko  | Paramushir Island (Russia)  | 50.686°N, 156.014°E  | Elevation 1103 m

Based on observations by volcanologists in Severo-Kurilsk (Paramushir Island), about 7 km E of Ebeko, explosions on 16 November generated ash plumes that rose as high as 2 km (6,600 ft) a.s.l. The Aviation Color Code remained at Orange (the second highest level on a four-color scale).

Source: Kamchatkan Volcanic Eruption Response Team (KVERT)



Volcano index photo  Kilauea  | Hawaiian Islands (USA)  | 19.421°N, 155.287°W  | Elevation 1222 m

During 15-21 November HVO reported that the lava lake continued to rise, fall, and spatter in Kilauea’s Overlook crater. Webcams recorded incandescence from long-active sources within Pu'u 'O'o Crater and from a small lava pond in a pit on the W side of the crater. Surface lava flows were active above and on the pali, and on the coastal plain. On 17 November a field crew visited the Kamokuna ocean entry and observed only very sluggish, pasty flows in a few random spots and minor to no degassing in the usual places.

Source: US Geological Survey Hawaiian Volcano Observatory (HVO)



Volcano index photo  Kirishimayama  | Kyushu (Japan)  | 31.934°N, 130.862°E  | Elevation 1700 m

JMA reported that during 13-20 November activity at Shinmoedake (Shinmoe peak), a stratovolcano of the Kirishimayama volcano group, continued to be slightly elevated. White plumes rose 200 m above the crater rim. The Alert Level remained at 3 (on a scale of 1-5).

Source: Japan Meteorological Agency (JMA)



Volcano index photo  Langila  | New Britain (Papua New Guinea)  | 5.525°S, 148.42°E  | Elevation 1330 m

Based on analyses of satellite imagery and model data, the Darwin VAAC reported that during 15-16 November ash plumes from Langila rose to altitudes of 1.8-2.7 km (6,000-9,000 ft) a.s.l. and drifted S and SW.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)



Volcano index photo  Sabancaya  | Peru  | 15.787°S, 71.857°W  | Elevation 5960 m

Observatorio Vulcanológico del Sur del IGP (OVS-IGP) and Observatorio Vulcanológico del INGEMMET (OVI) reported that explosive activity at Sabancaya increased compared to the previous week; there was an average of 82 explosions recorded per day during 13-19 November. Seismicity was dominated by long-period events, with signals indicating emissions. Gas-and-ash plumes rose 4 km above the crater rim and drifted 40 km NE, N, and NW. The MIROVA system detected eight thermal anomalies. The sulfur dioxide flux was high, at 3,103 tons per day on 13 November. The report noted that the public should not to approach the crater within a 12-km radius.

Sources: Instituto Geológico Minero y Metalúrgico (INGEMMET), Instituto Geofísico del Perú (IGP)



Volcano index photo  Sheveluch  | Central Kamchatka (Russia)  | 56.653°N, 161.36°E  | Elevation 3283 m

KVERT reported that a thermal anomaly over Sheveluch was identified in satellite images on 11 November; weather clouds prevented observations on the other days during 12-17 November. The Aviation Color Code remained at Orange.

Source: Kamchatkan Volcanic Eruption Response Team (KVERT)



Volcano index photo  Sinabung  | Indonesia  | 3.17°N, 98.392°E  | Elevation 2460 m

Based on observations by PVMBG, satellite and webcam images, and model data, the Darwin VAAC reported that during 15-19 November ash plumes from Sinabung rose 4.3-4.9 km (14,000-16,000 ft) a.s.l. and drifted NW, W, and SW. The Alert Level remained at 4 (on a scale of 1-4).

Source: Darwin Volcanic Ash Advisory Centre (VAAC)



Weekly Reports Archive


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Agung Fournaise, Piton de la Lewotobi Salak
Ahyi Fourpeaked Lewotolo San Cristobal
Aira Fuego Little Sitkin San Miguel
Akan Fujisan Llaima San Vicente
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Alu-Dalafilla Galeras Lokon-Empung Sangeang Api
Ambang Galunggung Lopevi Santa Ana
Ambrym Gamalama Machin Santa Maria
Anatahan Gamkonora Makian Sarigan
Antuco Gaua Makushin Sarychev Peak
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Balbi Hood Miyakejima Sorikmarapi
Bamus Hudson, Cerro Momotombo Sotara
Banda Api Huila, Nevado del Monowai Soufriere Hills
Bardarbunga Hunga Tonga-Hunga Ha'apai Montagu Island Soufrière St. Vincent
Barren Island Ibu Moyorodake [Medvezhia] South Sarigan Seamount
Batur Ijen Mutnovsky Spurr
Bezymianny Iliamna Nabro St. Helens
Bogoslof Iliwerung Negra, Sierra Stromboli
Brava Inielika Negro, Cerro Sulu Range
Bristol Island Ioto Nightingale Island Sumbing
Bulusan Iya Nishinoshima Sundoro
Calbuco Izu-Torishima Nisyros Suretamatai
Callaqui Jackson Segment Novarupta Suwanosejima
Cameroon Kaba NW Rota-1 Taal
Campi Flegrei Mar Sicilia Kambalny Nyamuragira Tair, Jebel at
Cayambe Kanaga Nyiragongo Takawangha
Cereme Kanlaon Okataina Talang
Chachadake [Tiatia] Karangetang Okmok Tambora
Chaiten Karkar Ontakesan Tanaga
Chiginagak Karthala Oraefajokull Tandikat-Singgalang
Chikurachki Karymsky Pacaya Tangkoko-Duasudara
Chiles-Cerro Negro Kasatochi Pagan Tangkubanparahu
Chillan, Nevados de Katla Palena Volcanic Group Tara, Batu
Chirinkotan Kavachi Paluweh Telica
Chirpoi Kelimutu Panarea Tenerife
Cleveland Kelut Papandayan Tengger Caldera
Colima Kerinci Parker Three Sisters
Colo Ketoi Pavlof Tinakula
Concepcion Kharimkotan Peuet Sague Tofua
Copahue Kick 'em Jenny Pinatubo Tokachidake
Cotopaxi Kikai Planchon-Peteroa Tolbachik
Cumbal Kilauea Poas Toliman
Dabbahu Kirishimayama Popocatepetl Tongariro
Dempo Kizimen Puyehue-Cordon Caulle Tungurahua
Descabezado Grande Klyuchevskoy Rabaul Turrialba
Dieng Volcanic Complex Kolokol Group Ranakah Ubinas
Dukono Korovin Raoul Island Ulawun
Ebeko Koryaksky Rasshua Unknown Source
Ebulobo Krakatau Raung Unnamed
Egon Krummel-Garbuna-Welcker Redoubt Veniaminof
Ekarma Kuchinoerabujima Reventador Villarrica
Epi Kusatsu-Shiranesan Rincon de la Vieja West Mata
Erebus Kverkfjoll Rinjani White Island
Erta Ale Lamington Ritter Island Witori
Etna Lamongan Rotorua Wolf
Etorofu-Yakeyama [Grozny Group] Langila Ruang Yasur
Eyjafjallajokull Lanin Ruapehu Zavodovski
Fernandina Lascar Ruiz, Nevado del Zhupanovsky
Fogo Lengai, Ol Doinyo Sabancaya Zubair Group
Fonualei Leroboleng Sakar
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 News Feeds and Google Placemarks




The RSS (Really Simple Syndication) feed is identical to the Weekly Volcanic Activity Report minus some features including the header information (latitude and longitude and summit elevation), the Geologic Summary, and a link to the volcano's page from the Global Volcanism Program. Each volcano report includes a link from the volcano's name back to the more complete information in the Weekly Volcanic Activity Report on the Smithsonian website.




The CAP (Common Alerting Protocol) feeds are XML files specifically formatted for disaster management. They are similar in content to the RSS feed, but contain no active links.




A Google Earth network link for the Weekly Volcanic Activity Report can be loaded into the free Google Earth software, and in turn will load placemarks for volcanoes in the current weekly report. Placemark balloons include the volcano name, report date, report text, sources, and links back to the GVP volcano page for that volcano and to the complete Weekly Report for that week.

 Criteria & Disclaimers


Criteria

The Weekly Volcanic Activity Report does not necessarily include all volcanic activity that occurred on Earth during the week. More than a dozen volcanoes globally have displayed more-or-less continuous eruptive activity for decades or longer, and such routine activity is typically not reported here. Moreover, Earth's sea-floor volcanism is seldom reported even though in theory it represents the single most prolific source of erupted material. The Weekly Volcanic Activity Report summarizes volcanic activity that meets one or more of the following criteria:

- A volcano observatory raises or lowers the alert level at the volcano.
- A volcanic ash advisory has been released by a volcanic ash advisory center (VAAC) stating that an ash cloud has been produced from the volcano.
- A verifiable news report of new activity or a change in activity at the volcano has been issued.
- Observers have reported a significant change in volcanic activity. Such activity can include, but is not restricted to, pyroclastic flows, lahars, lava flows, dome collapse, or increased unrest.

Volcanoes are included in the "New Activity/Unrest" section of the Weekly Volcanic Activity Report if the activity occurs after at least 3 months of quiescence. Once a volcano is included in the "New Activity/Unrest" section, updates will remain in that section unless the activity continues for more than 1 month without escalating, after which time updates will be listed in the "Continuing Activity" section. Volcanoes are also included in the "New Activity/Unrest" section if the volcano is undergoing a period of relatively high unrest, or increasing unrest. This is commonly equal to Alert Level Orange on a scale of Green, Yellow, Orange, Red, where Red is the highest alert. Or alert level 3 on a scale of 1-4 or 1-5.

It is important to note that volcanic activity meeting one or more of these criteria may occur during the week, but may not be included in the Weekly Volcanic Activity Report because we did not receive a report.


Disclaimers

1. The Weekly Volcanic Activity Report is intended to provide timely information about global volcanism on a weekly basis. Consequently, the report is generated rapidly by summarizing volcanic reports from various sources, with little time for fact checking. The accuracy of the Weekly Volcanic Activity Report is dependent upon the quality of the volcanic activity reports we receive. Reports published in the Bulletin of the Global Volcanism Network are monthly, and more carefully reviewed, although all of the volcanoes discussed in the Weekly Volcanic Activity Report are not necessarily reported in the Bulletin. Because of our emphasis on rapid reporting on the web we have avoided diacritical marks. Reports are updated on the Weekly Volcanic Activity Report web page as they are received, therefore information may be included regarding events that occurred before the current report period.

2. Rapidly developing events lead to coverage that is often fragmentary. Volcanoes, their eruptions, and their plumes and associated atmospheric effects are complex phenomena that may require months to years of data analysis in order to create a comprehensive summary and interpretation of events.

3. Preliminary accounts sometimes contain exaggerations and "false alarms," and accordingly, this report may include some events ultimately found to be erroneous or misleading.

4. Many news agencies do not archive the articles they post on the Internet, and therefore the links to some sources may not be active. To obtain information about the cited articles that are no longer available on the Internet contact the source.

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RSS and CAP Feeds

An RSS (Really Simple Syndication) feed for the Weekly Volcanic Activity Report first made available on 5 March 2008 can be utilized with the aid of various free downloadable readers. The report content of the news feed is identical to the Weekly Volcanic Activity Report minus some features including the header information (latitude and longitude and summit elevation), the Geologic Summary, and a link to the volcano's page from the Global Volcanism Program. Each volcano report includes a link from the volcano's name back to the more complete information in the Weekly Volcanic Activity Report on the Smithsonian website. On 12 March 2009, GeoRSS tags were added so that the latitude and longitude for each volcano could be included with the feed.

At the end of each individual report is a list of the sources used. We would like to emphasize that the World Organization of Volcano Observatories (WOVO) website (http://www.wovo.org/) lists the regional volcano observatories that have the most authoritative data for many of these events.

CAP (Common Alerting Protocol) feeds are XML files specifically formatted for disaster management.


Google Earth Placemarks

A Google Earth network link for the Weekly Volcanic Activity Report was first made available on 1 April 2009. This file can be loaded into the free Google Earth software, and in turn will load placemarks for volcanoes in the current weekly report. Placemark balloons include the volcano name, report date, report text, sources, and links back to the GVP volcano page for that volcano and to the complete Weekly Report for that week.

 Acronyms and Abbreviations


a.s.l. - above sea level

AVO - Alaska Volcano Observatory

AVHRR - Advanced Very High Resolution Radiometer

CENAPRED - Centro Nacionale de Prevencion de Desastres (México)

CONRED - Coordinadora Nacional para la Reducción de Desastres

COSPEC - Correlation Spectrometer

CVGHM (formerly VSI) - Center of Volcanology and Geological Hazard Mitigation

CVO - Cascades Volcano Observatory (USGS)

GMS - Geostationary Meteorological Satellite

GOES - Geostationary Operational Environmental Satellite

GVO - Goma Volcano Observatory

GVP - Global Volcanism Program (Smithsonian Institution)

HVO - Hawaiian Volcano Observatory (USGS)

ICE - Instituto Costarricense de Electricidad (Costa Rica)

IG - Instituto Geofísico (Ecuador)

IGNS - Institute of Geological and Nuclear Sciences (New Zealand)

INETER - Instituto Nicaragüense de Estudios Territoriales (Nicaragua)

INGEMMET - Instituto Geológical Minero y Metalúrgico (Peru)

INGEOMINAS - Instituto Colombiano de Geología y Minería (Colombia)

INGV-CT - Istituto Nazionale di Geofisica e Vulcanologia - Sezione di Catania (Italy)

INSIVUMEH - Instituto Nacional de Sismologia, Vulcanologia, Meteorologia e Hidrologia (Guatemala)

IRD - Institut de Recherche pour le Développement (France)

JMA - Japanese Meteorological Agency

KEMSD - Kamchatkan Experimental and Methodical Seismilogical Department

KVERT - Kamchatkan Volcanic Eruption Response Team

M - magnitude

METEOSAT - Meteorological Satellite

MEVO - Mount Erebus Volcano Observatory

MODIS - Moderate Resolution Imaging Spectroradiometer

MVO - Montserrat Volcano Observatory

MWO - Meteorological Watch Office

NEIC - National Earthquake Information Center

NIED - National Research Institute for Earth Science and Disaster Prevention (Japan)

NOAA - National Oceanic and Atmospheric Administration

NOTAM - Notice to Airmen

OVDAS - Observatorio Volcanológico de los Andes del Sur (Chile)

OFDA - Office of US Foreign Disaster Assistance

ONEMI - Oficina Nacional de Emergencia - Ministerio del Interior (Chile)

OVPDLF - Observatoire Volcanologique du Piton de la Fournaise (France)

OVSICORI-UNA - Observatorio Vulcanologico y Sismologico de Costa Rica, Universidad Nacional (Costa Rica)

PHIVOLCS - Philippine Institute of Volcanology and Seismology

RSAM - Real-time Seismic Amplitude Measurement

RVO - Rabaul Volcano Observatory

SERNAGEOMIN - Servicio Nacional de Geología y Minería (Chile)

SIGMET - Significant Meteorological Information

SNET - Servicio Nacional de Estudios Territoriales (El Salvador)

SVERT - Sakhalin Volcanic Eruption Response Team (Kurile Islands)

USAID - US Agency for International Development

USGS - United States Geological Survey

UTC - Coordinated Universal Time

VAAC - Volcanic Ash Advisory Center

VAFTAD - Volcanic Ash Forecast Transport And Dispersion

VDAP - Volcano Disaster Assistance Program (USGS)

VHP - Volcano Hazards Program (USGS)

VRC - Volcano Research Center (Japan)