All times are local unless otherwise stated.

Chaiten (Chile) | 11 June-17 June 2008 | New Activity / Unrest Cite this Report
Chaiten Andean Southern Volcanic Arc	SERNAGEOMIN reported that visual observations of Chaitén were inhibited due to inclement weather during 10-12 June. Customs officers in the town of Chaitén reported noises on 11 June. They also reported the presence of two new craters to the S that emitted ash-and-gas plumes on 12 June. The plumes drifted S. Later that day in Chaitén town, an abrupt swelling of the river Chaitén was observed. Seismic events increased in number and intensity. An overflight on 14 June revealed spines rising above the top of the new lava dome, which had grown in height to exceed the old dome. Gas, ash, and steam plumes were primarily emitted from a vent, about 100 m in diameter, at the SE contact between the old and the new lava dome. Previously, emissions came from the NW contact between the old and new domes. Continuous explosions produced ash plumes that rose to an altitude of 3 km (10,000 ft) a.s.l. and drifted E. Several other points of gas-and-steam emissions were seen along the contact. Small block-and-ash flows from the new dome had descended the S flank of the old dome and occasionally reached the caldera floor. The Alert Level remained at Red. Based on observations of satellite imagery, SIGMET reports, and pilot observations, the Buenos Aires VAAC reported that during 11-16 June ash plumes rose to altitudes of 2.1-3.7 km (7,000-12,000 ft) a.s.l. and drifted N, NE, and E. Sources: Buenos Aires Volcanic Ash Advisory Center (VAAC), Servicio Nacional de Geología y Minería (SERNAGEOMIN)
Gorely (Russia) | 11 June-17 June 2008 | New Activity / Unrest Cite this Report
Gorely Kuril Volcanic Arc	KVERT reported that seismic activity in the area of Gorely and Mutnovsky volcanoes increased on 13 June. There is only one seismic station in the area of the two volcanoes, so the source of the seismicity could not be determined. Activity was not visually noted and satellite imagery was not available at the time of the seismicity increase. The level of Concern Color Code was raised to Yellow on 14 June. Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Mutnovsky (Russia) | 11 June-17 June 2008 | New Activity / Unrest Cite this Report
Mutnovsky Kuril Volcanic Arc	KVERT reported that seismic activity in the area of Gorely and Mutnovsky volcanoes increased on 13 June. There is only one seismic station in the area of the two volcanoes, so the source of the seismicity could not be determined. Activity was not visually noted and satellite imagery was not available at the time of the seismicity increase. The level of Concern Color Code was raised to Yellow on 14 June. Source: Kamchatkan Volcanic Eruption Response Team (KVERT)

Aira (Japan) | 11 June-17 June 2008 | Continuing ActivityCite this Report
Aira Ryukyu Volcanic Arc	Based on information from JMA, the Tokyo VAAC reported that during 12-13 June explosions from Sakura-jima produced ash plumes to an altitude of 3.4 km (11,000 ft) a.s.l. The plumes drifted NW, NE, and SW. Source: Tokyo Volcanic Ash Advisory Center (VAAC)
Batu Tara (Indonesia) | 11 June-17 June 2008 | Continuing ActivityCite this Report
Batu Tara Sunda Volcanic Arc	Based on observations of satellite imagery, the Darwin VAAC reported that low-level plumes from Batu Tara rose to an altitude of 2.1 km (7,000 ft) a.s.l. and drifted NW during 14-15 June. A thermal anomaly was noted on satellite imagery on 14 June. Source: Darwin Volcanic Ash Advisory Centre (VAAC)
Fuego (Guatemala) | 11 June-17 June 2008 | Continuing ActivityCite this Report
Fuego Central America Volcanic Arc	INSIVUMEH reported that during 13-17 June, explosions from Fuego produced ash plumes that rose to altitudes of 3.9-4.4 km (12,800-14,400 ft) a.s.l. On 13 June, lahars descended the Santa Teresa (W) and Ceniza (SW) drainages and a lava flow traveled 100 m towards the Santa Teresa. On 15 June, rumbling noises were accompanied by shock waves. On 17 June, fumarolic plumes were noted and incandescent material visible at night was ejected about 50 m above the crater. Source: Instituto Nacional de Sismologia, Vulcanologia, Meteorologia, e Hidrologia (INSIVUMEH)
Karymsky (Russia) | 11 June-17 June 2008 | Continuing ActivityCite this Report
Karymsky Eastern Kamchatka Volcanic Arc	KVERT reported that seismic activity at Karymsky was slightly above background levels on 6 June and at background during 7-13 June. Gas-and-ash explosions that produced plumes to an altitude of 2.6 km (8,500 ft) a.s.l. may have occurred on 6 June. Observations of satellite imagery revealed thermal anomalies in the crater on 6, 7, and 11 June. The Level of Concern Color Code remained at Orange. Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Kilauea (United States) | 11 June-17 June 2008 | Continuing ActivityCite this Report
Kilauea Hawaiian-Emperor Hotspot Volcano Group	Based on visual observations from HVO crews, reports from county officials, and web camera views, HVO reported that during 11-17 June lava flowed SE through a lava tube system underneath Kilauea's Thanksgiving Eve Breakout (TEB) and rootless shield complex to the Waikupanaha ocean entry. Incandescence was occasionally noted from the TEB vent area. Gas continued to jet from a vent about 30 m below Pu'u 'O'o crater's E rim. During the reporting period, Kilauea summit earthquakes were located beneath HVO, beneath Puhimau Crater, N of Pu'u 'O'o, beneath the summit area, along the S-flank fault, and along the SW rift zone. An average of 10-40 small earthquakes (not located) were detected daily. The eruption from the vent in Halema'uma'u crater continued to produce white plumes with minor ash content that drifted mainly SW. Night-time incandescence was seen at the base of the plume. Seismic tremor was elevated. The sulfur dioxide emission rate was high and fluctuated between 420 and 800 tonnes per day when measured during 9-14 June. The background rate is 150-200 tonnes per day. Source: US Geological Survey Hawaiian Volcano Observatory (HVO)
Rabaul (Papua New Guinea) | 11 June-17 June 2008 | Continuing ActivityCite this Report
Rabaul Bismarck Volcanic Arc	RVO reported that during 10-18 June white plumes from Rabaul caldera's Tavurvur cone rose to altitudes less than 1.7 km (5,600 ft) a.s.l. and drifted SW. During 10-12 June, intermittent roaring and incandescence at the summit were reported. On 17 June, ash plumes rose to an altitude of 1.7 km (5,600 ft) a.s.l. and drifted N and NW. White plumes with a small amount of ash were seen the next day. Source: Rabaul Volcano Observatory (RVO)
Santa Maria (Guatemala) | 11 June-17 June 2008 | Continuing ActivityCite this Report
Santa Maria Central America Volcanic Arc	INSIVUMEH reported that during 13-17 June, weak explosions from Santa María's Santiaguito lava dome complex produced ash plumes that rose to altitudes of 4.1-4.4 km (13,500-14,400 ft) a.s.l. and drifted SW. On 13 June, gas-and-steam plumes rose from Caliente cone and drifted SE. The Washington VAAC reported that multiple small ash puffs were visible in satellite imagery on 16 June. Sources: Instituto Nacional de Sismologia, Vulcanologia, Meteorologia, e Hidrologia (INSIVUMEH), Washington Volcanic Ash Advisory Center (VAAC)
Sheveluch (Russia) | 11 June-17 June 2008 | Continuing ActivityCite this Report
Sheveluch Eastern Kamchatka Volcanic Arc	KVERT reported that seismic activity at Shiveluch was at background levels during 6-13 June. According to video footage and visual observations, moderate fumarolic activity was noted during 5-9 June. Observations of satellite imagery revealed a daily thermal anomaly in the crater. The Level of Concern Color Code remained at Orange. Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Soufriere Hills (United Kingdom) | 11 June-17 June 2008 | Continuing ActivityCite this Report
Soufriere Hills Lesser Antilles Volcanic Arc	MVO reported no evidence of lava-dome growth at Soufrière Hills during 7-13 June. Seismic activity remained low. The E talus slope continued to erode, producing minor rockfalls that descended into the Tar River Valley. The Alert Level remained elevated at 4 (on a scale of 0-5). Source: Montserrat Volcano Observatory (MVO)
Suwanosejima (Japan) | 11 June-17 June 2008 | Continuing ActivityCite this Report
Suwanosejima Ryukyu Volcanic Arc	Based on information from JMA, the Tokyo VAAC reported that an explosion from Suwanose-jima occurred on 17 June. The altitude and direction of a possible resultant plume were not reported. Source: Tokyo Volcanic Ash Advisory Center (VAAC)
Tungurahua (Ecuador) | 11 June-17 June 2008 | Continuing ActivityCite this Report
Tungurahua Andean Northern Volcanic Arc	The IG reported that although visual observations were occasionally limited due to cloud cover during 12-15 June, ash-and-steam plumes from Tungurahua were spotted that rose to altitudes less than 6 km (19,700 ft) a.s.l. Ash plumes drifted W and NE and ashfall was reported during 13-15 June in areas within 8 km W and SW. On 15 June, lahars descended NW and S drainages and resulted in a road closure in the Pampas sector to the S. A small lahar descended the Palitahua drainage on 16 June. Source: Instituto Geofísico-Escuela Politécnica Nacional (IG-EPN)
Ubinas (Peru) | 11 June-17 June 2008 | Continuing ActivityCite this Report
Ubinas Andean Central Volcanic Arc	Based on a SIGMET report, the Buenos Aires VAAC reported that on 13 June an ash plume from Ubinas rose to an altitude of 6.7 km (22,000 ft) a.s.l. and drifted S. Source: Buenos Aires Volcanic Ash Advisory Center (VAAC)

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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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)