All times are local unless otherwise stated.

Chachadake [Tiatia] | 16 June-22 June 2010 | New Activity / Unrest Cite this Report
Chachadake [Tiatia] Unknown	SVERT reported that a thermal anomaly from Tiatia, a volcano on NE Kunashir Island, was detected by satellite on 19 June. Tiatia does not have a seismic network; satellite image observations are the primary tool for monitoring many of the Kuril Islands volcanoes. Source: Sakhalin Volcanic Eruption Response Team (SVERT)
Etna | 16 June-22 June 2010 | New Activity / Unrest Cite this Report
Etna Unknown	INGV-CT reported a series of landslides on 19 June from the NW rim of the pit crater located on the lower E side of Etna's Southeast Crater. The collapses generated small ash clouds that drifted NE, and changed the pit crater's morphology. Data from a thermal camera showed thermal anomalies over 180 degrees Celsius indicating that the landslide material was hot. Fumarolic activity was seen in the landslide area during an inspection the day before. Source: Sezione di Catania - Osservatorio Etneo (INGV)
Gorely | 16 June-22 June 2010 | New Activity / Unrest Cite this Report
Gorely Unknown	KVERT reported that during 6 and 12-13 June strong steam-and-gas activity from Gorely was noted, and during 11-18 June seismic activity was above background levels. A small increase in the size and temperature of a thermal anomaly over the volcano began on 15 June and was detected through 18 June. The Level of Aviation Color Code remained at Green. Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Ioto | 16 June-22 June 2010 | New Activity / Unrest Cite this Report
Ioto Unknown	Based on a pilot observation, the Tokyo VAAC reported that an ash plume from Ioto (Iwo-jima) drifted more than 35 km N. Source: Tokyo Volcanic Ash Advisory Center (VAAC)
Nevado del Huila | 16 June-22 June 2010 | New Activity / Unrest Cite this Report
Nevado del Huila Unknown	INGEOMINAS reported that during 9-15 June sulfur dioxide plumes from Nevado del Huila were detected by multiple sources. A distinct change in seismicity was noted on 13 June and was characterized by an increased intensity and a greater number of hybrid earthquakes. These earthquakes were shallow events beneath Pico Central. The Alert Level was raised to II (Orange; "probable eruption in term of days or weeks"). On 16 June two episodes of tremor possibly indicated ash emissions; this was unconfirmed. However, sulfur dioxide plumes were again detected. During 20-21 June small white pulsating fumarolic plumes drifted W. Source: Servicio Geológico Colombiano (SGC)
Pacaya | 16 June-22 June 2010 | New Activity / Unrest Cite this Report
Pacaya Unknown	INSIVUMEH reported that during 16-22 June Pacaya's MacKenney cone emitted white-and-blue fumarolic plumes that rose 50-400 m high. Ash emissions were occasionally observed. INSIVUMEH also noted that the lava flows on the SE flank were advancing more slowly and exhibited fewer areas of incandescence. Source: Instituto Nacional de Sismologia, Vulcanologia, Meteorologia, e Hidrologia (INSIVUMEH)
Tungurahua | 16 June-22 June 2010 | New Activity / Unrest Cite this Report
Tungurahua Unknown	Although storm clouds occasionally prevented observations of Tungurahua's summit area during 16-18 June, steam-and-ash plumes were seen that rose to altitudes of 5.5-7 km (18,000-23,000 ft) a.s.l. Daily reports of ashfall came from multiple areas about 8 km W and SW, but ash was noted as far away as 15 km SW on 17 June. Ashfall in Cahuají (8 km SW) covered pastureland, preventing animals from grazing. Roaring noises were occasionally reported. During 17-18 June, incandescence from the crater was seen at night. An explosion was followed by roaring noises, sounds resembling blocks rolling down the flanks, and incandescence. On 19 June steam-and-ash plumes rose 500 m above the crater and large windows vibrated after noises were heard. The next day snow covered parts of the E and S flanks. Steam-and-gas plumes rose 500 m and drifted SSW, E, and NW during 20-21 June. Lahars in drainages to the SW carried blocks up to 50 cm in diameter. On 21 June ashfall was reported in areas 8 km W. Source: Instituto Geofísico-Escuela Politécnica Nacional (IG-EPN)
Ulawun | 16 June-22 June 2010 | New Activity / Unrest Cite this Report
Ulawun Unknown	RVO reported that during 16-17 June white and gray plumes from Ulawun rose 1 km high. Fine ash fell on the SW, W, and NW flanks. Low rumbling noises were heard from the S and SE flanks, and weak fluctuating incandescence was observed for a brief period of time. On 18 and 19 June, white-to-gray plumes rose from the crater, and roaring noises were reported from the NW flank. Seismicity increased to a high level and was dominated by volcanic tremor. During 19-20 June continuing white and gray emissions produced plumes that rose 1 km. Fine ashfall was seen on the NW and SW flanks. Fluctuating incandescence was seen from the S and SE flanks and occasional low roaring noises were noted. Seismicity declined to moderate levels on 20 June. Source: Rabaul Volcano Observatory (RVO)

Aira | 16 June-22 June 2010 | Continuing ActivityCite this Report
Aira Unknown	Based on information from JMA, the Tokyo VAAC reported that during 16-22 June explosions from Sakura-jima sometimes produced plumes. Those plumes, along with ash plumes occasionally seen by pilots, rose to altitudes of 1.2-3 km (4,000-10,000 ft) a.s.l. According to a news article, the JMA noted that two eruptions on 20 June brought the total number of eruptions in 2010 to 550, setting a new annual record. The total number of eruptions in 2009, the previous high at Sakura-jima, was 548. Sources: Tokyo Volcanic Ash Advisory Center (VAAC), The Japan Times
Batu Tara | 16 June-22 June 2010 | Continuing ActivityCite this Report
Batu Tara Unknown	Based on analyses of satellite imagery, the Darwin VAAC reported that during 19-20 June ash plumes from Batu Tara rose to an altitude of 3 km (10,000 ft) a.s.l. and drifted more than 35 km NW. Source: Darwin Volcanic Ash Advisory Centre (VAAC)
Dukono | 16 June-22 June 2010 | Continuing ActivityCite this Report
Dukono Unknown	Based on analyses of satellite imagery, the Darwin VAAC reported that during 18-20 June ash plumes from Dukono rose to an altitude of 2.4 km (8,000 ft) a.s.l. and drifted 120 km W. Source: Darwin Volcanic Ash Advisory Centre (VAAC)
Gaua | 16 June-22 June 2010 | Continuing ActivityCite this Report
Gaua Unknown	Based on information from the Vanuatu Geohazards Observatory, the Wellington VAAC reported that during 16-19 June ash plumes from Gaua rose to an altitude of 3 km (10,000 ft) a.s.l. On 19 June the plume drifted more than 90 km W. Source: Wellington Volcanic Ash Advisory Center (VAAC)
Karymsky | 16 June-22 June 2010 | Continuing ActivityCite this Report
Karymsky Unknown	KVERT reported that during 11-18 June seismic activity from Karymsky was above background levels. Seismic data suggested that possible ash plumes rose to an altitude of 5.2 km (17,000 ft) a.s.l. during 10-12 June and to an altitude of 3.9 km (12,800 ft) a.s.l. on 16 June. Satellite imagery analysis revealed ash plumes that drifted about 195 km E on 10 and 11 June and a thermal anomaly over the volcano on 11, 15, and 16 June. Small ash clouds drifted 22 km E on 17 June. The Aviation Color Code level remained at Orange. Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Kilauea | 16 June-22 June 2010 | Continuing ActivityCite this Report
Kilauea Unknown	During 16-22 June 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 inset 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, and occasionally fresh spatter, 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 520 m elevation. Satellite images showed thermal anomalies from minor lava flows originating from the shields. The Pu'u 'O'o web camera views of a lava pond on the crater floor, that was an estimated 300 x 150 m in dimension, were often obscured by fumes. One small lava flow was seen on the crater floor on 18 June. Scientists saw a new gas vent on the E wall of the crater during an overflight on 21 June that had generated incandescence during the previous few days. Source: US Geological Survey Hawaiian Volcano Observatory (HVO)
Klyuchevskoy | 16 June-22 June 2010 | Continuing ActivityCite this Report
Klyuchevskoy Unknown	KVERT reported that during 11-18 June seismic activity from Kliuchevskoi was above background levels and Strombolian activity was observed. Ashfall was reported in Klyuchi, 30 km NNE on 11 June. Ash plumes occasionally rose to an altitude of 5.5 km (18,000 ft) a.s.l. during 13-16 June. Satellite imagery analysis revealed a large daily thermal anomaly from the volcano and ash plumes that drifted 40 km SE on 13 and 15 June. The Aviation Color Code level remained at Orange. Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Sheveluch | 16 June-22 June 2010 | Continuing ActivityCite this Report
Sheveluch Unknown	KVERT reported that during 11-18 June seismic activity from Shiveluch was above background levels and suggested that possible ash plumes rose to an altitude of 4.9 km (16,100 ft) a.s.l. Strong fumarolic activity and hot avalanches were seen on most days. Satellite imagery showed a large daily thermal anomaly over the lava dome, and a small anomaly near the lava dome on 15 June. The Aviation Color Code level remained at Orange. Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Soufriere Hills | 16 June-22 June 2010 | Continuing ActivityCite this Report
Soufriere Hills Unknown	MVO reported that pyroclastic flows from the Soufrière Hills lava dome occurred during 11-18 June. One of the largest pyroclastic flows traveled W down Gages Valley; others originated from within the collapse scar. A thermal camera showed several hot areas on the lava dome, likely exposed from rockfall and pyroclastic flow activity. On 28 June a small lahar descended the Belham Valley, to the NW. The Hazard Level remained at 3. Source: Montserrat Volcano Observatory (MVO)

Weekly Reports Archive

Since the Weekly Volcanic Activity Report began in November 2000, there have been 20,140 individual reports over 1,221 weeks (average of 16 per week) on 334 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)