All times are local unless otherwise stated.

Ekarma (Russia) | 1 September-7 September 2010 | New Activity / Unrest Cite this Report
Ekarma Kuril Volcanic Arc	On 6 September, SVERT reported that strong steam-and-gas activity from Ekarma continued. Ekarma does not have a seismic network; satellite image analysis and infrequent ground observations are the primary tool for monitoring many of the Kuril Islands volcanoes. Source: Sakhalin Volcanic Eruption Response Team (SVERT)
Etna (Italy) | 1 September-7 September 2010 | New Activity / Unrest Cite this Report
Etna Sicily Volcanic Province	INGV-CT reported that on 25 August a powerful explosion from Etna's Bocca Nuova crater initiated a series of ash emissions, which continued at decreasing strength for about 20 minutes. A thermal camera located at La Montagnola, 3 km S of the summit craters, showed ejected hot material and a cauliflower-shaped, dark gray ash plume that rose about 1 km and drifted E. Ashfall was reported in areas SE from Etna to Catania (27 km S). An inspection the next morning revealed that the W wall of the BN-1 crater of Bocca Nuova had collapsed. During 25-29 August a total of seven explosions were recorded. Source: Sezione di Catania - Osservatorio Etneo (INGV)
Klyuchevskoy (Russia) | 1 September-7 September 2010 | New Activity / Unrest Cite this Report
Klyuchevskoy Eastern Kamchatka Volcanic Arc	KVERT reported that 27 August-3 September seismic activity from Kliuchevskoi was above background levels and lava flowed down the SW flank. Satellite imagery analyses showed a large and intense daily thermal anomaly over the volcano. On 27 August, activity increased; ash plumes rose to an altitude of 6 km (19,700 ft) a.s.l. and drifted 120 km SE. Strombolian activity was observed during 27-30 August. Phreatic explosions occurred on the SW flank on 29 and 30 August. Ash plumes rose to an altitude of 6.5 km (21,300 ft) a.s.l. on 30 August and drifted 278 km SE. Based on analyses of satellite imagery and information from the Yelizovo Airport (UHPP), the Tokyo VAAC reported a possible eruption on 3 September. Subsequent images showed continuing emissions. Later that day a notice stated that ash had dissipated. Another possible eruption that day produced a plume that rose to an altitude of 5.5 km (18,000 ft) a.s.l. and drifted E. During 4-7 September eruptions reported by KVERT and seen in satellite imagery produced ash plumes that rose to altitudes of 5.2-7 km (17,000-23,000 ft) a.s.l. and drifted NW, E, and SE. The Aviation Color Code level remained at Orange. Sources: Tokyo Volcanic Ash Advisory Center (VAAC), Kamchatkan Volcanic Eruption Response Team (KVERT)
Manam (Papua New Guinea) | 1 September-7 September 2010 | New Activity / Unrest Cite this Report
Manam Bismarck Volcanic Arc	RVO reported that ash plumes and diffuse blue vapor plumes rose 150 m from Manam's Main Crater on 30 August. That same day gray emissions rose from South Crater at 5-10 minute intervals. During 30 August-2 September incandescence was observed when the craters could be seen. Source: Rabaul Volcano Observatory (RVO)
Planchon-Peteroa (Chile) | 1 September-7 September 2010 | New Activity / Unrest Cite this Report
Planchon-Peteroa Andean Southern Volcanic Arc	SERNAGEOMIN reported that on 6 September an explosive eruption from Planchón-Peteroa produced an ash plume that rose 1.2 km above the complex and drifted mainly E to a distance of 30 km, with some parts of the plume going N and S. That same day SERNAGEOMIN received pictures from Romeral (approximately 61 km NW) that showed ash-and-gas plumes rising 200 m. Source: Servicio Nacional de Geología y Minería (SERNAGEOMIN)
Seulawah Agam (Indonesia) | 1 September-7 September 2010 | New Activity / Unrest Cite this Report
Seulawah Agam Sunda Volcanic Arc	CVGHM reported that although seismicity from Seulawah Agam fluctuated during April to August 2010, the data reflected increased activity overall. On 1 September, CVGHM raised the Alert Level to 2 (on a scale of 1-4) and restricted visitors from approaching the crater within a 3-km radius. Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)
Sinabung (Indonesia) | 1 September-7 September 2010 | New Activity / Unrest Cite this Report
Sinabung Sunda Volcanic Arc	According to news articles, about 6,000 of the approximately 30,000 people that evacuated the area around Sinabung after the eruption during 29-30 August returned home within a few days because activity had decreased. The Darwin VAAC reported a large explosion on 3 September, based on information from CVGHM. News reports stated that the explosion vibrated homes and trees on the flanks, and generated a 3-km-high ash plume. CVGHM reported that another large explosion on 7 September produced an ash plume that rose 5 km above the crater and drifted SE. Strong vibrations caused by the explosion were detected as far away as 8 km SE. Sources: The Jakarta Post, Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM), Associated Press, CNN
Villarrica (Chile) | 1 September-7 September 2010 | New Activity / Unrest Cite this Report
Villarrica Andean Southern Volcanic Arc	Based on analyses of satellite imagery, the Buenos Aires VAAC reported that on 4 September a diffuse ash plume from Villarrica, possibly containing steam and gas, drifted NE. Source: Buenos Aires Volcanic Ash Advisory Center (VAAC)

Aira (Japan) | 1 September-7 September 2010 | Continuing ActivityCite this Report
Aira Ryukyu Volcanic Arc	Based on information from JMA, the Tokyo VAAC reported that explosions from Sakura-jima during 1-5 September produced plumes that rose to altitudes of 1.5-2.4 km (5,000-8,000 ft) a.s.l. Some of the plumes drifted N, NW, and W. During 2-4 September pilots reported that ash plumes rose to altitudes of 2.1-3.4 km (7,000-11,000 ft) a.s.l. An explosion also occurred on 7 September. Source: Tokyo Volcanic Ash Advisory Center (VAAC)
Batu Tara (Indonesia) | 1 September-7 September 2010 | Continuing ActivityCite this Report
Batu Tara Sunda Volcanic Arc	Based on analyses of satellite imagery, the Darwin VAAC reported that during 1-7 September ash plumes from Batu Tara rose to altitudes of 1.5-2.4 km (5,000-8,000 ft) a.s.l. and drifted 45-65 km W and NW. Source: Darwin Volcanic Ash Advisory Centre (VAAC)
Bezymianny (Russia) | 1 September-7 September 2010 | Continuing ActivityCite this Report
Bezymianny Eastern Kamchatka Volcanic Arc	KVERT reported that a thermal anomaly over Bezymianny was observed in satellite imagery on 29 August and 1 September. Gas-and-steam activity was also noted on 1 September. Cloud cover prevented observations of the volcano on the other days during 27 August-3 September. The Aviation Color Code level remained at Yellow. Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Cleveland (United States) | 1 September-7 September 2010 | Continuing ActivityCite this Report
Cleveland Aleutian Ridge Volcanic Arc	AVO reported that during 31 August-1 September thermal anomalies from Cleveland were detected in satellite imagery. The Volcano Alert Level remained at Advisory and the Aviation Color Code remained at Yellow. No current seismic information was available because Cleveland does not have a real-time seismic network. Source: US Geological Survey Alaska Volcano Observatory (AVO)
Dukono (Indonesia) | 1 September-7 September 2010 | Continuing ActivityCite this Report
Dukono Halmahera Volcanic Arc	Based on analyses of satellite imagery, the Darwin VAAC reported that during 1-2 and 6-7 September ash plumes from Dukono rose to an altitude of 2.4 km (8,000 ft) a.s.l. and drifted almost 95 km W and NW. Source: Darwin Volcanic Ash Advisory Centre (VAAC)
Karymsky (Russia) | 1 September-7 September 2010 | Continuing ActivityCite this Report
Karymsky Eastern Kamchatka Volcanic Arc	KVERT reported that during 27 August-3 September seismic activity from Karymsky was above background levels and suggested that possible ash plumes rose to an altitude of 3.7 km (12,100 ft) a.s.l. Satellite imagery showed a thermal anomaly over the volcano during the week and an ash plume that drifted 23 km on 28 August. The Aviation Color Code level remained at Orange. Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Kilauea (United States) | 1 September-7 September 2010 | Continuing ActivityCite this Report
Kilauea Hawaiian-Emperor Hotspot Volcano Group	During 1-7 September HVO reported that activity at Kilauea continued from the summit caldera and the east rift zone. At the summit caldera, the level of the lava-pool surface in the deep pit within the floor of Halema'uma'u crater remained mostly stable; glow from the vent was also visible at night. A plume from the vent drifted SW and deposited ash nearby. At Pu'u 'O'o crater, incandescence emanated from an active hornito on the N floor. On 4 September lava started to flow along the S margin of the crater floor and was active the next day. At the east rift zone, lava that flowed through the TEB lava-tube system fed minor surface flows on the coastal plain, as well as the Puhi-o-Kalaikini ocean entry. Source: US Geological Survey Hawaiian Volcano Observatory (HVO)
Pacaya (Guatemala) | 1 September-7 September 2010 | Continuing ActivityCite this Report
Pacaya Central America Volcanic Arc	INSIVUMEH reported that during 1-2 September steam plumes rose from Pacaya's MacKenney cone and drifted NE and W. Source: Instituto Nacional de Sismologia, Vulcanologia, Meteorologia, e Hidrologia (INSIVUMEH)
Sangay (Ecuador) | 1 September-7 September 2010 | Continuing ActivityCite this Report
Sangay Andean Northern Volcanic Arc	The Washington VAAC reported that on 5 September an ash plume from Sangay that rose to an altitude of 5.5 km (18,000 ft) a.s.l. was observed by a pilot. Ash was not seen in satellite imagery. Source: Washington Volcanic Ash Advisory Center (VAAC)
Santa Maria (Guatemala) | 1 September-7 September 2010 | Continuing ActivityCite this Report
Santa Maria Central America Volcanic Arc	INSIVUMEH reported that on 1 September fumarolic plumes from Santa María's Santiaguito lava dome complex rose less than 100 m above the crater and drifted SE. Ashfall was reported in an area to the SW. On 2 September block avalanches descended the W flank. On 2 and 6 September explosions produced ash plumes that rose 500-1,000 m and drifted W and SW. Source: Instituto Nacional de Sismologia, Vulcanologia, Meteorologia, e Hidrologia (INSIVUMEH)
Sheveluch (Russia) | 1 September-7 September 2010 | Continuing ActivityCite this Report
Sheveluch Eastern Kamchatka Volcanic Arc	KVERT reported that during 27 August-3 September seismic activity from Shiveluch was above background levels, suggesting that possible ash plumes rose to an altitude of 6.5 km (21,300 ft) a.s.l. Satellite imagery analysis showed a thermal anomaly on the volcano. Gas-and-ash plumes were observed during 27-30 August. Based on information from KEMSD and satellite imagery analyses, the Tokyo VAAC reported that during 2-3 September eruptions produced plumes that rose to an altitude of 6.7 km (22,000 ft) a.s.l. The Aviation Color Code level remained at Orange. Sources: Tokyo Volcanic Ash Advisory Center (VAAC), Kamchatkan Volcanic Eruption Response Team (KVERT)

Weekly Reports Archive

Since the Weekly Volcanic Activity Report began in November 2000, there have been 20,322 individual reports over 1,229 weeks (average of 17 per week) on 336 different volcanoes.

Use the dropdowns to choose the year and week for archived Weekly Reports.

 News Feeds and Google Placemarks

 Criteria & Disclaimers

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.

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 cover longer time periods and are 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.

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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)