All times are local unless otherwise stated.

Gamkonora | 4 July-10 July 2007 | New Activity / Unrest Cite this Report
Gamkonora Halmahera	On 8 July, a phreatic eruption from Gamkonora produced an ash plume that rose to an altitude of 1.8 km (5,900 ft) a.s.l. The plume drifted N and ashfall was reported from villages as far as 7 km downwind. The Alert Level was raised to 2 (on a scale of 1-4). On 9 July, seismic activity increased and eruption plumes rose to altitudes of 2.1-2.6 km (7,000-8,500 ft) a.s.l. The Alert Level was raised to 3. Later that day, ash plumes rose to an altitude of 5.6 km (18,400 ft) a.s.l. and the Alert Level was raised to 4. During 9-10 July, incandescent material was propelled 5-50 m above the crater. On 10 July, booming noises were followed by ash plumes that rose to 4.1 km (13,500 ft) a.s.l. About 8,400 people evacuated from villages within an 8 km radius of the volcano. Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)
Kilauea | 4 July-10 July 2007 | New Activity / Unrest Cite this Report
Kilauea Hawaiian Islands (USA)	On 2 July, HVO scientists confirmed new lava flows at the bottom of Kilauea's Pu'u 'O'o crater and raised the Volcanic Alert Level from Advisory to Watch and Aviation Color Code from Yellow to Orange. During 3-10 July, the lava lake grew and was active. On 6 July, two vents that fed the growing lava lake were identified: the W vent near the former Beehive location and the E vent near the former East Pond location. On 8 July, a small area of crust in the lava lake intermittently fumed. Source: US Geological Survey Hawaiian Volcano Observatory (HVO)
Klyuchevskoy | 4 July-10 July 2007 | New Activity / Unrest Cite this Report
Klyuchevskoy Central Kamchatka (Russia)	KVERT reported that seismic activity at Kliuchevskoi had decreased, but remained above background levels during 29 June-6 July. Based on seismic interpretation, ash plumes possibly rose to altitudes of 6-7 km (19,700-23,000 ft) a.s.l. On 4 July, the Level of Concern Color Code was lowered from Red to Orange. During 2-5 July, ash plumes rose to estimated altitudes of 5-6 km (16,400-20,000 ft) a.s.l. based on atmospheric profiles. Plumes were visible on satellite imagery drifting NNW, W, and SE. Source: Kamchatkan Volcanic Eruption Response Team (KVERT)

Concepcion | 4 July-10 July 2007 | Continuing ActivityCite this Report
Concepcion Nicaragua	INETER reported that explosions in the crater of Concepción on 10 July produced ash-and-gas plumes that drifted NW. Ashfall was reported from areas downwind. Source: Instituto Nicaragüense de Estudios Territoriales (INETER)
Etna | 4 July-10 July 2007 | Continuing ActivityCite this Report
Etna Sicily (Italy)	The Toulouse VAAC reported that minor activity from Etna was detected on satellite imagery on 7 July. Source: Toulouse Volcanic Ash Advisory Centre (VAAC)
Karymsky | 4 July-10 July 2007 | Continuing ActivityCite this Report
Karymsky Eastern Kamchatka (Russia)	During 29 June-6 July, seismic activity at Karymsky was above background levels. The seismic data indicated that ash plumes may have risen to altitudes of 2.7 and 4.6 km (8,900 and 15,100 ft) a.s.l. on 1 and 4 July, respectively. A thermal anomaly in the crater was visible on satellite imagery on 30 June and 1 July. The Level of Concern Color Code remained at Orange. Based on information from KEMSD, the Tokyo VAAC reported that an eruption plume rose to an altitude of 2.4 km (8,000 ft) a.s.l. on 8 July. Ash was not identified on satellite imagery. Sources: Kamchatkan Volcanic Eruption Response Team (KVERT), Tokyo Volcanic Ash Advisory Center (VAAC)
Langila | 4 July-10 July 2007 | Continuing ActivityCite this Report
Langila New Britain (Papua New Guinea)	RVO reported that emission of ash plumes from Langila's Crater 2 continued during 10 June-3 July and were occasionally forceful. Ash plumes rose to altitudes of 2.3-3.3 km (7,500-10,800 ft) a.s.l. and drifted N and NW. Crater 3 was quiet. Source: Rabaul Volcano Observatory (RVO)
Nyiragongo | 4 July-10 July 2007 | Continuing ActivityCite this Report
Nyiragongo DR Congo	According to news articles, a tourist climbed over the rim of Nyiragongo on 6 July to photograph the lava lake and died after slipping and falling about 100 m. Intense heat and gas from the active lava lake made the recovery mission difficult. Sources: Reuters, Agence France-Presse (AFP)
Salak | 4 July-10 July 2007 | Continuing ActivityCite this Report
Salak Western Java	According to news articles, sulfur gas poisoning from one of Salak's fume-filled craters was suspected in the deaths of six teenagers on 7 July. Several more poisoned students were taken to a nearby hospital for treatment. The students were part of a group camping on the volcano for the weekend. Sources: Reuters, Deutsche Presse-Agentur
Sangay | 4 July-10 July 2007 | Continuing ActivityCite this Report
Sangay Ecuador	Based on pilot observations, the Washington VAAC reported that an ash plume from Sangay rose to an altitude between 5.2-7.9 km (17,000-26,000 ft) a.s.l. and drifted W on 3 July. Source: Washington Volcanic Ash Advisory Center (VAAC)
Sheveluch | 4 July-10 July 2007 | Continuing ActivityCite this Report
Sheveluch Central Kamchatka (Russia)	KVERT reported that seismic activity at Shiveluch continued above background levels during 29 June-6 July. Based on seismic interpretation, ash plumes rose to an altitude of 6.5 km (21,300 ft) a.s.l. during the reporting period. A large thermal anomaly was detected in the crater on satellite imagery all days. The Level of Concern Color Code remained at Orange. Based on information from KEMSD, the Tokyo VAAC reported that an eruption plume rose to 4.6 km (15,000 ft) a.s.l. during 27-28 June. Ash was not identified on satellite imagery. Sources: Kamchatkan Volcanic Eruption Response Team (KVERT), Tokyo Volcanic Ash Advisory Center (VAAC)
Soufriere Hills | 4 July-10 July 2007 | Continuing ActivityCite this Report
Soufriere Hills Montserrat	MVO reported that during 29 June-10 July the lava dome at Soufrière Hills changed very little based on visual observations, and seismic activity was very low. Low-level rockfall activity continued, however, and predominantly affected the Tar River Valley to the E. Heavy rainfall generated lahars in E drainages during 4-6 July. The Alert Level remained at 4 (on a scale of 0-5). Source: Montserrat Volcano Observatory (MVO)
St. Helens | 4 July-10 July 2007 | Continuing ActivityCite this Report
St. Helens Washington	Data from deformation-monitoring instruments indicated that during 4-10 July lava-dome growth at Mount St. Helens continued. Seismicity persisted at low levels, punctuated by M 1.5-2.5, and occasionally larger, earthquakes. In some instances, clouds inhibited visual observations. Source: US Geological Survey Cascades Volcano Observatory (CVO)
Tungurahua | 4 July-10 July 2007 | Continuing ActivityCite this Report
Tungurahua Ecuador	During 3-10 July, IG reported that ash plumes from Tungurahua rose to altitudes of 6-7.5 km (19,700-24,600 ft) a.s.l. and drifted mainly SW and W. Ashfall was reported from areas downwind during 4 and 6-9 July. Incandescence was visible at the crater on 4 and 9 July and noises were reported during 4-5, 7, and 10 July. On 8 July, incandescence was again seen at the summit and blocks rolled 500 m down the flanks. On 9 July, two explosions were accompanied by "cannon shots" that vibrated windows at the Tungurahua Observatory (OVT) in Guadalupe, 11 km N. Strombolian activity was observed and blocks rolled 1 km down the flanks. On 10 July, a lahar occurred in a W drainage. Based on pilot reports, information from IG, and satellite imagery, the Washington VAAC reported that during 9-10 July, ash plumes rose to altitudes of 4.9-7 km (16,000-23,000 ft) a.s.l. and drifted W. Sources: Instituto Geofísico-Escuela Politécnica Nacional (IG-EPN), Washington Volcanic Ash Advisory Center (VAAC)
Ubinas | 4 July-10 July 2007 | Continuing ActivityCite this Report
Ubinas Peru	Based on a Significant Meteorological Information (SIGMET) advisory, the Buenos Aires VAAC reported that an ash plume from Ubinas rose to an altitude between 5.5-6.1 km (18,000-20,000 ft) a.s.l. and drifted S on 4 July. Ash was not identified on satellite imagery. Source: Buenos Aires Volcanic Ash Advisory Center (VAAC)

Weekly Reports Archive

Since the Weekly Volcanic Activity Report began in November 2000, there have been 19,363 individual reports over 1,185 weeks (average of 16 per week) on 331 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)