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Smithsonian / USGS Weekly Volcanic Activity Report

Weekly Volcanic Activity Map

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 that meet criteria discussed in detail in the "Criteria and Disclaimers" section. Carefully reviewed, detailed narratives on various volcanoes are published as reports of the Bulletin of the Global Volcanism Network.

Smithsonian / USGS Weekly Volcanic Activity Report for the week of 4 October-10 October 2006
Name Location Eruption Start Date Report Status
Fourpeaked United States New
Mayon Luzon (Philippines) New
Rabaul New Britain (Papua New Guinea) New
Aira Kyushu (Japan) 2017 Mar 25 Continuing
Bulusan Luzon (Philippines) Continuing
Karymsky Eastern Kamchatka (Russia) 2020 Apr 1 Continuing
Kilauea Hawaiian Islands (USA) 2020 Dec 20 Continuing
Ruapehu North Island (New Zealand) Continuing
Soufriere Hills Montserrat Continuing
St. Helens United States Continuing
Suwanosejima Ryukyu Islands (Japan) 2004 Oct 23 Continuing
Taal Luzon (Philippines) Continuing
Tungurahua Ecuador Continuing
Ubinas Peru Continuing
Weekly Reports Archive

Since the Weekly Volcanic Activity Report began in November 2000, there have been 16,408 individual reports over 1,051 weeks (average of 16 per week) on 309 different volcanoes.

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Agung Concepcion Ibu Lewotobi Papandayan Sorikmarapi
Ahyi Copahue Ijen Lewotolo Parker Sotara
Aira Cotopaxi Iliamna Little Sitkin Pavlof Soufriere Hills
Akan Cuicocha Iliwerung Llaima Pelee Soufriere St. Vincent
Alaid Cumbal Inielika Loihi Peuet Sague South Sarigan Seamount
Alu-Dalafilla Dabbahu Ioto Lokon-Empung Pinatubo Spurr
Ambae Dempo Irazu Lopevi Planchon-Peteroa St. Helens
Ambang Descabezado Grande Iya Machin Poas Stromboli
Ambrym Dieng Volcanic Complex Izu-Torishima Makian Popocatepetl Sulu Range
Anatahan Dukono Jackson Segment Makushin Puyehue-Cordon Caulle Sumbing
Antillanca Volcanic Complex Ebeko Kaba Maly Semyachik Rabaul Sundoro
Antuco Ebulobo Kadovar Manam Raikoke Suretamatai
Apoyeque Egon Kambalny Manda Hararo Ranakah Suwanosejima
Arenal Ekarma Kanaga Marapi Raoul Island Taal
Asamayama Epi Kanlaon Maroa Rasshua Tair, Jebel at
Askja Erebus Karangetang Martin Raung Takawangha
Asosan Erta Ale Karkar Masaya Redoubt Talang
Augustine Etna Karthala Maule, Laguna del Reventador Tambora
Avachinsky Etorofu-Yakeyama [Grozny Group] Karymsky Mauna Loa Reykjanes Tanaga
Awu Eyjafjallajokull Kasatochi Mayon Rincon de la Vieja Tandikat-Singgalang
Axial Seamount Fernandina Katla McDonald Islands Rinjani Tangkoko-Duasudara
Azul, Cerro Fogo Katmai Melimoyu Ritter Island Tangkuban Parahu
Azumayama Fonualei Kavachi Merapi Rotorua Tara, Batu
Bagana Fournaise, Piton de la Kelimutu Midagahara Ruang Telica
Balbi Fourpeaked Kelut Misti, El Ruapehu Tenerife
Bamus Fuego Kerinci Miyakejima Ruiz, Nevado del Tengger Caldera
Banda Api Fujisan Ketoi Momotombo Sabancaya Three Sisters
Bardarbunga Fukutoku-Oka-no-Ba Kharimkotan Monowai Sakar Tinakula
Barren Island Galeras Kick 'em Jenny Montagu Island Salak Tofua
Batur Galunggung Kikai Moyorodake [Medvezhia] San Cristobal Tokachidake
Bezymianny Gamalama Kilauea Mutnovsky San Miguel Tolbachik
Bogoslof Gamkonora Kirishimayama Myojinsho San Vicente Toliman
Brava Gaua Kizimen Nabro Sangay Tongariro
Bristol Island Gorely Klyuchevskoy Negra, Sierra Sangeang Api Tungurahua
Bulusan Great Sitkin Kolokol Group Negro, Cerro Santa Ana Turrialba
Calbuco Grimsvotn Korovin Nightingale Island Santa Maria Ubinas
Callaqui Guagua Pichincha Koryaksky Nishinoshima Sarigan Ulawun
Cameroon Guallatiri Krakatau Nisyros Sarychev Peak Unnamed
Campi Flegrei del Mar di Sicilia Guntur Krummel-Garbuna-Welcker Novarupta Saunders Unnamed
Cayambe Hachijojima Krysuvik NW Rota-1 Semeru Veniaminof
Cereme Hakoneyama Kuchinoerabujima Nyamuragira Semisopochnoi Villarrica
Chachadake [Tiatia] Heard Kurikomayama Nyiragongo Seulawah Agam West Mata
Chaiten Hekla Kusatsu-Shiranesan Okataina Sheveluch Westdahl
Chiginagak Helgrindur Kverkfjoll Okmok Shishaldin Whakaari/White Island
Chikurachki Hierro Lamington Ontakesan Simbo Witori
Chiles-Cerro Negro Hokkaido-Komagatake Lamongan Oraefajokull Sinabung Wolf
Chillan, Nevados de Home Reef Langila Osorno Sinarka Yasur
Chirinkotan Hood Lanin Pacaya Siple Zaozan [Zaosan]
Chirpoi Huaynaputina Lascar Pagan Sirung Zavodovski
Cleveland Hudson, Cerro Lateiki Palena Volcanic Group Slamet Zhupanovsky
Colima Huila, Nevado del Lengai, Ol Doinyo Paluweh Snaefellsjokull Zubair Group
Colo Hunga Tonga-Hunga Ha'apai Leroboleng Panarea Soputan
 News Feeds and Google Placemarks


Download Smithsonian / USGS Weekly Volcanic Activity Report Network RSS Feed

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. At the end of each report is a list of the sources used. 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. This feature was first made available on 5 March 2008.



Download Smithsonian / USGS Weekly Volcanic Activity Report Network CAP Feed

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.



Download Smithsonian/USGS Weekly Volcanic Activity Report Network Link Download Smithsonian / USGS Weekly Volcanic Activity Report Network Link

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 profile page and to the complete Weekly Report for that week. This feature was first made available on 1 April 2009.

 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.

5. USGS Disclaimer Statement for this Website:

Information presented on this website is considered public information and may be distributed or copied. Use of appropriate byline/photo/image credit is requested. We strongly recommend that USGS data be acquired directly from a USGS server and not through other sources that may change the data in some way. While USGS makes every effort to provide accurate and complete information, various data such as names, telephone numbers, etc. may change prior to updating. USGS welcomes suggestions on how to improve our home page and correct errors. USGS provides no warranty, expressed or implied, as to the accuracy, reliability or completeness of furnished data.

Some of the documents on this server may contain live references (or pointers) to information created and maintained by other organizations. Please note that USGS does not control and cannot guarantee the relevance, timeliness, or accuracy of these outside materials.

For site security purposes and to ensure that this service remains available to all users, this government computer system employs software programs to monitor network traffic to identify unauthorized attempts to upload or change information, or otherwise cause damage. Unauthorized attempts to upload information or change information on this website are strictly prohibited and may be punishable under the Computer Fraud and Abuse Act of 1986 and the National Information Infrastructure Protection Act. Information may also be used for authorized law enforcement investigations. (Last modified September 21, 1999.)

U.S. Department of the Interior, U.S. Geological Survey, Reston, VA, USA
URL: https://volcano.si.edu/reports_weekly.cfm

 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) - now GNS Science

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 Volcanologico 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 (Philippines)

RSAM - Real-time Seismic Amplitude Measurement

RVO - Rabaul Volcano Observatory

SERNAGEOMIN - Servicio Nacional de Geologia y Mineria (Chile)

SIGMET - Significant Meteorological Information

SNET - Servicio Nacional de Estudios Territoriales (El Salvador)

SVERT - Sakhalin Volcanic Eruption Response Team (Russia)

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)

Report for Fourpeaked
The AVO reported that volcanic unrest continued at Fourpeaked during 30 September-6 October. A seismometer that was installed on 25 September indicated ongoing low-level seismicity. Due to the limited number of seismometers, earthquake epicenters were not located. Emission rates of sulfur dioxide were high, similar to the previous week.
Source: US Geological Survey Alaska Volcano Observatory (AVO)
Report for Mayon
PHIVOLCS reported on 1 October that fumarolic activity from Mayon produced steam plumes that drifted ENE. Intense incandescence was observed at the summit. Observations were not possible 2-3 October due to cloud cover. According to news articles, the Alert Level was lowered to 2 on 3 October.
Sources: Philippine Institute of Volcanology and Seismology (PHIVOLCS), The Manila Times
Report for Rabaul
The RVO reported that a large, sustained Vulcanian eruption of Rabaul began at about 0845 on 7 October. An ash column rose to over 5 km (16,400 ft a.s.l.) and had produced thunder and lightning. Sand-sized particles fell to the E. By 1200, windows rattled and doors slammed in the nearby town of Rabaul, N of Tavurvur crater, from semi-continuous air blasts that became rhythmic. Windows in the observatory, 12 km away, blew out from shockwaves. Moderately heavy ash fell in southern Rabaul town. Lapilli ~1 mm in diameter and lithics up to 3 cm in diameter fell in the S and SW parts of the caldera. Residents affected by heavier ashfall and air blasts self-evacuated. The eruption grew to sub-Plinian status throughout the day. Thick ash plumes reached 18 km (59,000 ft a.s.l.) altitude and dispersed N, NW, S, and SW. Ashfall affected the entire Gazelle Peninsula.

At 1415, the eruption style changed to Strombolian, which lasted until about 1730. During the night, moderate to bright incandescence was observed on the N rim of Tavurvur. Explosions and loud roaring noises were occasionally heard.

On 8 October, thick white and blue vapor clouds were accompanied by ash explosions and plumes that drifted N and NW. Lava flows on the W and N flanks were visible from 2 km NW in Rapindik. The lava flow on the W flank reached the sea, causing secondary explosions.
Sources: Rabaul Volcano Observatory (RVO), Times Online
Report for Aira
Based on information from JMA and satellite imagery, the Tokyo VAAC reported eruptions at Sakura-jima on 7, 8, and 10 October. Plumes rose to 1.8-2.4 km (6,000-8,000 ft) a.s.l. and drifted W, S, and SW, respectively.
Source: Tokyo Volcanic Ash Advisory Center (VAAC)
Report for Bulusan
On 10 October, an eruption plume from Bulusan that was visible on satellite imagery reached altitudes of 3 km (10,000 ft) a.s.l. and drifted SW and SSE.
Source: Tokyo Volcanic Ash Advisory Center (VAAC)
Report for Karymsky
KVERT reported on 6 October that activity at Karymsky continued during 30 September-6 October, with 120-190 shallow earthquakes occurring daily. Explosions produced ash plumes that possibly reached altitudes of 2.5 km (8,200 ft) a.s.l. A thermal anomaly in the crater was detected on 30 September, and 2 and 4 October. Karymsky remained at Concern Color Code Orange.
Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Report for Kilauea
The summit of Kilauea continued to slowly inflate S of Halema'uma'u caldera during 4-5 October. Incandescence was intermittently visible from the East Pond and January vents, South Wall complex, and Drainhole vent in Pu'u 'O'o's crater, when weather permitted. Lava from the Campout and PKK systems continued to flow off of a lava delta into the ocean at the East Lae'apuki and East Ka'ili'ili entries. Incandescence from surface flows was intermittently visible on Pulama pali.
Source: US Geological Survey Hawaiian Volcano Observatory (HVO)
Report for Ruapehu
A M 2.8 earthquake centered at Ruapehu was recorded on 4 October. Scientists visited the summit crater lake on 7 October and confirmed that a small hydrothermal eruption had occurred. The lake water level had risen 1 m since a previous measurement, and evidence suggested wave action up to 4-5 m above the surface of the lake. The lake temperature was 22.5°C, up from 15°C. Ruapehu remained at Volcanic Alert Level 1 (some signs of volcano unrest).
Source: GeoNet
Report for Soufriere Hills
MVO reported that during 29 September-6 October the lava dome at Soufrière Hills continued to grow at a moderate rate. Rockfalls were concentrated on the N and NE sectors. The vents just inside Gage's wall and on the summit of the dome periodically produced both ash and gases. The lava-dome volume was estimated at 90 million cubic meters.

Based on information from the MVO, pilot reports, and the Piarco MWO, the Washington VAAC reported ongoing emissions during 5-10 October. Plumes reached altitudes of 2.4 km (8,000 ft) a.s.l. and drifted W.
Sources: Montserrat Volcano Observatory (MVO), Washington Volcanic Ash Advisory Center (VAAC)
Report for St. Helens
Lava continued to extrude onto the S crater floor of St. Helens during 4-10 October. Low levels of seismicity and periodic tilt of the crater floor accompanied small rockfalls. A small steam plume was visible on 9 October.
Source: US Geological Survey Cascades Volcano Observatory (CVO)
Report for Suwanosejima
Based on information from JMA, the Tokyo VAAC reported an explosion from Suwanose-jima on 6 October.
Source: Tokyo Volcanic Ash Advisory Center (VAAC)
Report for Taal
PHIVOLCS reported ongoing seismic unrest at Taal on 26 September. During 25-26 September, 29 volcanic earthquakes occurred with five felt Modified Mercalli intensities of II to III. Epicenters were dispersed NE, N, and NW. Approximately five seismic events in a 24-hour period is typical during quiet periods.
Source: Philippine Institute of Volcanology and Seismology (PHIVOLCS)
Report for Tungurahua
During 4-5 October, fumaroles on the N flank of Tungurahua were active. Steam emissions with minor ash content rose to 1 km above the summit (or 19,800 ft a.s.l.) and drifted W. Additional steam plumes possibly originated from the recent lava-flow front. Incandescence was not observed.
Source: Instituto Geofísico-Escuela Politécnica Nacional (IG)
Report for Ubinas
Based on satellite imagery, the Buenos Aires VAAC issued an aviation ash advisory for Ubinas on 5 October. The continuous ash emissions reached altitudes of 5.5 km (18,000 ft) a.s.l. and drifted S.
Source: Buenos Aires Volcanic Ash Advisory Center (VAAC)