All times are local unless otherwise stated.

Soufriere Hills (United Kingdom) | 7 July-13 July 2010 | New Activity / Unrest Cite this Report
Soufriere Hills Lesser Antilles Volcanic Arc	MVO reported that small swarms of volcano-tectonic earthquakes from Soufrière Hills on 23 and 25 June were coincident with ash venting beginning on 25 June. Ash venting diminished on 28 June. A second period of ash venting took place on 2 July and was preceded by two volcano-tectonic and two long-period earthquakes. An emission of ash, with accompanying rumbling noises, formed a plume that drifted WNW and caused ashfall in uninhabited areas of Gages, Plymouth, and the Foxes Bay region. During 2-9 July, roaring was often heard. The Hazard Level remained at 3. Source: Montserrat Volcano Observatory (MVO)
Stromboli (Italy) | 7 July-13 July 2010 | New Activity / Unrest Cite this Report
Stromboli Aeolian Volcanic Arc	INGV-CT reported that two major explosions from Stromboli were detected by the seismic network. These explosions occurred from the SW crater area on 25 June and from the NE crater area on 30 June. Poor weather conditions prevented visual observations using the web camera monitoring system. The event on 30 June was stronger, with several explosions occurring in a short time. Fallout from incandescent blocks triggered vegetation fires. Source: Sezione di Catania - Osservatorio Etneo (INGV)

Aira (Japan) | 7 July-13 July 2010 | Continuing ActivityCite this Report
Aira Ryukyu Volcanic Arc	Based on pilot observations, the Tokyo VAAC reported that on 7 and 9 July ash plumes from Sakura-jima rose to altitudes of 1.8-2.7 km (6,000-9,000 ft) a.s.l. and drifted SE and NE. The VAAC also noted that the JMA reported explosions during 11-13 July. Source: Tokyo Volcanic Ash Advisory Center (VAAC)
Bagana (Papua New Guinea) | 7 July-13 July 2010 | Continuing ActivityCite this Report
Bagana Solomon Volcanic Arc	Based on analyses of satellite imagery, the Darwin VAAC reported that an ash plume from Bagana rose to an altitude of 2.4 km (8,000 ft) a.s.l. and drifted 75-150 km SW during 10-11 July. Source: Darwin Volcanic Ash Advisory Centre (VAAC)
Dukono (Indonesia) | 7 July-13 July 2010 | Continuing ActivityCite this Report
Dukono Halmahera Volcanic Arc	Based on analyses of satellite imagery, the Darwin VAAC reported that during 7 and 9-10 July ash plumes from Dukono rose to an altitude of 2.4 km (8,000 ft) a.s.l. and drifted 35-75 km NW and N. Source: Darwin Volcanic Ash Advisory Centre (VAAC)
Karymsky (Russia) | 7 July-13 July 2010 | Continuing ActivityCite this Report
Karymsky Eastern Kamchatka Volcanic Arc	KVERT reported that during 2-9 July seismic activity from Karymsky was above background levels and suggested that possible ash plumes rose to an altitude of 2 km (6,500 ft) a.s.l. A thermal anomaly was detected in satellite imagery on most days; cloud cover occasionally prevented views of the volcano. On 7 July ash plumes drifted 20 km S. Based on information from the Yelizovo Airport (UHPP), the Tokyo VAAC reported that on 13 July an ash plume rose to an altitude of 2.7 km (9,000 ft) a.s.l. and drifted W. The Aviation Color Code level remained at Orange. Sources: Kamchatkan Volcanic Eruption Response Team (KVERT), Tokyo Volcanic Ash Advisory Center (VAAC)
Kilauea (United States) | 7 July-13 July 2010 | Continuing ActivityCite this Report
Kilauea Hawaiian-Emperor Hotspot Volcano Group	During 7-13 July HVO reported that activity at Kilauea continued from the summit and the east rift zone. At the summit, the level of a 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 mainly drifted SW, dropping small amounts of tephra downwind. At the east rift zone, lava flows that broke out of the TEB lava-tube system built up a number of rootless shields between 580 and 395 m elevation. Thermal anomalies detected in satellite images and visual observations showed that minor lava flows originating from the shields traveled as far down as 60 m elevation near the base of the pali on 11 July. Source: US Geological Survey Hawaiian Volcano Observatory (HVO)
Kirishimayama (Japan) | 7 July-13 July 2010 | Continuing ActivityCite this Report
Kirishimayama Ryukyu Volcanic Arc	Based on reports from JMA, the Tokyo VAAC reported that an eruption from the Kirishima volcanic complex on 10 July produced a plume that rose to an altitude of 1.8 km (6,000 ft) a.s.l. Source: Tokyo Volcanic Ash Advisory Center (VAAC)
Klyuchevskoy (Russia) | 7 July-13 July 2010 | Continuing ActivityCite this Report
Klyuchevskoy Eastern Kamchatka Volcanic Arc	KVERT reported that during 2-9 July seismic activity from Kliuchevskoi was above background levels. Satellite imagery analysis showed a large daily thermal anomaly over the volcano and a gas-and-steam plume that drifted 76 km S on 2 July. Ash plumes occasionally rose to an altitude of 5.3 km (17,400 ft) a.s.l., and gas-and-steam activity was seen during 2-4 July. According to a news article, lava flowed from a fissure during 8-9 July. The Aviation Color Code level remained at Orange. Sources: Itar-Tass News, Kamchatkan Volcanic Eruption Response Team (KVERT)
Pacaya (Guatemala) | 7 July-13 July 2010 | Continuing ActivityCite this Report
Pacaya Central America Volcanic Arc	On 7 and 9 July, INSIVUMEH reported that white plumes rose from Pacaya's MacKenney cone and drifted N. Small explosions were detected by the seismic network on 7 July. According to a CONRED notice, INSIVUMEH reported that an explosion on 13 July generated an ash plume that rose 300 m above the crater and drifted SW. Ash and tephra fell in nearby areas, and 150 people were evacuated. Sources: Coordinadora Nacional para la Reducción de Desastres (CONRED), Instituto Nacional de Sismologia, Vulcanologia, Meteorologia, e Hidrologia (INSIVUMEH)
Sheveluch (Russia) | 7 July-13 July 2010 | Continuing ActivityCite this Report
Sheveluch Eastern Kamchatka Volcanic Arc	KVERT reported that during 2-9 July seismic activity from Shiveluch was above background levels and suggested that on most days possible ash plumes rose to an altitude of 7 km (22,900 ft) a.s.l. On 5 July ash plumes from hot avalanches rose to an altitude of 4 km (13,100 ft) a.s.l. and strong fumarolic activity was noted. Ashfall was observed around the volcano. Satellite imagery showed a large daily thermal anomaly over the lava dome and an ash plume that drifted 20 km S on 7 July. Tokyo VAAC reported that satellite imagery analyses indicated a possible eruption on 10 July. The Aviation Color Code level remained at Orange. Sources: Tokyo Volcanic Ash Advisory Center (VAAC), Kamchatkan Volcanic Eruption Response Team (KVERT)
Tungurahua (Ecuador) | 7 July-13 July 2010 | Continuing ActivityCite this Report
Tungurahua Northern Andean Volcanic Arc	Observations of Tungurahua's summit area during 7-13 July were often not possible due to inclement weather. On 7 July steam-and-ash plumes rose to an altitude of 6 km (19,700 ft) a.s.l. and drifted WSW. The next day explosions were accompanied by acoustic waves. A steam plume rose to an altitude of 8 km (26,200 ft) a.s.l. and drifted NW. Ashfall was reported in Cusúa about 8 km downwind. Incandescence from the crater was seen during both nights. Ash-and-steam plumes were seen on 9 July. Ashfall was reported in a few areas 8 km SW and W. On 10 and 12 July plumes with low ash content drifted W. Ashfall was reported 7-8 km to the W and NNW on 12 July. Incandescent blocks descended the flanks at night to 500 m below the crater on 9 and 12 July. Source: Instituto Geofísico-Escuela Politécnica Nacional (IG-EPN)
Ulawun (Papua New Guinea) | 7 July-13 July 2010 | Continuing ActivityCite this Report
Ulawun Bismarck Volcanic Arc	RVO reported that white-to-gray plumes rose less than 500 m from Ulawun during 27 June-9 July, and fine ash fell in areas to the SW, W, and NW. Occasional roaring noises were heard on 28 June and during 5-6 July. A slight increase in seismicity (above moderate levels) indicated by overlapping tremors and Real-time Seismic-Amplitude Measurement (RSAM) values was noted during 5-8 July. Source: Rabaul Volcano Observatory (RVO)

Weekly Reports Archive

Since the Weekly Volcanic Activity Report began in November 2000, there have been 20,627 individual reports over 1,243 weeks (average of 17 per week) on 338 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.

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)