All times are local unless otherwise stated.

Kavachi (Solomon Islands) | 19 November-25 November 2003 | New Activity / Unrest Cite this Report
Kavachi Solomon Volcanic Province	An observer from The Wilderness Lodge reported that a 15-m-high island formed at Kavachi during an eruptive cycle 3 months prior to a visit on 16 November. By 16 November the summit had reduced to ~32 m below sea level. No evidence of volcanic activity was observed during the 3 previous months, which is the first time this has occurred in 4 years of observation. Source: The Wilderness Lodge

Colima (Mexico) | 19 November-25 November 2003 | Continuing ActivityCite this Report
Colima Trans-Mexican Volcanic Arc	A subtle ash plume, visible in satellite imagery, was emitted from Colima on 18 November at 1900 and rose to ~5.5 km a.s.l. Source: Washington Volcanic Ash Advisory Center (VAAC)
Dukono (Indonesia) | 19 November-25 November 2003 | Continuing ActivityCite this Report
Dukono Halmahera Volcanic Arc	Satellite imagery showed ash plumes emitted from Dukono on 19 November at 1403, 20 November at 0713, and 21 November at 1428, extending ~185 km NE, ~170 km NE, and ~150 km ESE, respectively. A possible ash plume was observed on 22 November at 1349. All plumes were below ~3 km a.s.l. Source: Darwin Volcanic Ash Advisory Centre (VAAC)
Fuego (Guatemala) | 19 November-25 November 2003 | Continuing ActivityCite this Report
Fuego Central America Volcanic Arc	Small explosive eruptions at Fuego produced gas-and-ash plumes up to 1.2 km above the crater. During the night of 18-19 November moderate-sized avalanches were observed in the upper Santa Teresa and Trinidad ravines. Night-time incandescence at the summit was common during the week. Periods of harmonic tremor, lasting between 0.5-3 hours, were recorded on 23 November, and almost continuous harmonic tremor was recorded for a period of 21 hours on 24 November. Source: Instituto Nacional de Sismologia, Vulcanologia, Meteorologia, e Hidrologia (INSIVUMEH)
Karymsky (Russia) | 19 November-25 November 2003 | Continuing ActivityCite this Report
Karymsky Eastern Kamchatka Volcanic Arc	During 15-21 November, intermittent explosive eruptions at Karymsky produced gas-and-ash plumes that rose to 1.5-2 km above the crater. Karymsky remained at Concern Color Orange. Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Kilauea (United States) | 19 November-25 November 2003 | Continuing ActivityCite this Report
Kilauea Hawaiian-Emperor Hotspot Volcano Group	Minor surface lava flows were observed upslope of Kilauea's coastal plain the week of 19-25 November. Small amounts of inflation and deflation were recorded through the week with sharp deflation beginning at both Uwekahuna and Pu`u O`o early on the morning of 25 November. Moderate, shallow seismicity was recorded beneath the summit, and moderate-to-high seismicity occurred beneath Pu`u O`o. Source: US Geological Survey Hawaiian Volcano Observatory (HVO)
Klyuchevskoy (Russia) | 19 November-25 November 2003 | Continuing ActivityCite this Report
Klyuchevskoy Eastern Kamchatka Volcanic Arc	Strombolian activity was observed at Kliuchevskoi on 14-15 November. During 14-15 and 18 November, gas-and-ash plumes rose to ~2.5 km above the crater and extended more than 10 km W, E, and NE. During 15-20 November, seismic activity continued to be above background levels with 75 shallow M 1.9-2.5 earthquakes and many small, shallow earthquakes recorded. Kliuchevskoi remained at Concern Color Code Orange. Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Popocatepetl (Mexico) | 19 November-25 November 2003 | Continuing ActivityCite this Report
Popocatepetl Trans-Mexican Volcanic Arc	Activity at Popocatépetl remained stable during the week with numerous gas-and-steam emissions. Based on information from the Mexico City MWO, the Washington VAAC reported that an ash plume was emitted on 22 November that rose to ~9.5 km a.s.l. and extended ~19 km NE. Sources: Washington Volcanic Ash Advisory Center (VAAC), Centro Nacional de Prevencion de Desastres (CENAPRED)
Santa Maria (Guatemala) | 19 November-25 November 2003 | Continuing ActivityCite this Report
Santa Maria Central America Volcanic Arc	Small eruptions on 18 and 23 November at Santa María's Santiaguito lava dome produced localized tephra fall. Small avalanches from the SW portion of the dome occurred on 18 November. On 24 November at 0745, five explosions occurred at 1-minute intervals, producing a gas-and-ash plume that rose to 2 km above the crater and was dispersed up to 12 km SSW. Source: Instituto Nacional de Sismologia, Vulcanologia, Meteorologia, e Hidrologia (INSIVUMEH)
Tungurahua (Ecuador) | 19 November-25 November 2003 | Continuing ActivityCite this Report
Tungurahua Northern Andean Volcanic Arc	During 19-25 November, activity at Tungurahua remained high, with numerous moderate explosions producing plumes that were frequently visible on satellite imagery and rose up to 2 km above the crater. Ash was dispersed to the SSW and SW on 19 and 20 November and WNW and NW on 23 and 24 November, respectively. Throughout the week Strombolian activity was visible at night. Sources: Washington Volcanic Ash Advisory Center (VAAC), Instituto Geofísico-Escuela Politécnica Nacional (IG-EPN)

Weekly Reports Archive

Since the Weekly Volcanic Activity Report began in November 2000, there have been 21,447 individual reports over 1,277 weeks (average of 17 per week) on 339 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)