All times are local unless otherwise stated.

Kavachi (Solomon Islands) | 24 March-30 March 2004 | New Activity / Unrest Cite this Report
Kavachi Solomon Volcanic Arc	Based on a report by an observer from The Wilderness Lodge, a news article indicated that Kavachi recently began to erupt after a long quiet period. Source: People First Network
Three Sisters (United States) | 24 March-30 March 2004 | New Activity / Unrest Cite this Report
Three Sisters High Cascades Volcanic Arc	On 23 March at around 1000 a seismic swarm began at South Sister that lasted ~48 hours. Over 300 volcano-tectonic earthquakes up to M 1.9 were recorded. The earthquakes were located in the NE quadrant of the area of on-going uplift. Sources: Pacific Northwest Seismic Network, US Geological Survey Cascades Volcano Observatory (CVO)

Aira (Japan) | 24 March-30 March 2004 | Continuing ActivityCite this Report
Aira Ryukyu Volcanic Arc	Based on information from the Japanese Meteorological Agency, the Tokyo VAAC reported that explosions at Sakura-jima on 26 March at 1715 and 27 March at 0607 produced plumes that extended S and rose to ~2.5 km a.s.l. and ~2 km a.s.l., respectively. Source: Tokyo Volcanic Ash Advisory Center (VAAC)
Dukono (Indonesia) | 24 March-30 March 2004 | Continuing ActivityCite this Report
Dukono Halmahera Volcanic Arc	According to the Darwin VAAC, during 24-28 March ash plumes were visible on satellite imagery reaching a height of ~3 km a.s.l. On 24 March one of these plumes extended ~185 km E. Source: Darwin Volcanic Ash Advisory Centre (VAAC)
Fuego (Guatemala) | 24 March-30 March 2004 | Continuing ActivityCite this Report
Fuego Central America Volcanic Arc	During 24-30 March, sporadic weak explosions and three strong explosions were recorded at Fuego. On 26 March a strong explosion produced an ash plume that reached ~1 km above the vent and caused incandescent avalanches in the Zanjón Barranca Seca and Trinidad ravines. On 29 March two explosions within 7 minutes produced gas-and-ash plumes that reached heights of ~1 km above the vent. A lahar occurred on 29 March in the Zanjón Barranca Seca ravine. Source: Instituto Nacional de Sismologia, Vulcanologia, Meteorologia, e Hidrologia (INSIVUMEH)
Karymsky (Russia) | 24 March-30 March 2004 | Continuing ActivityCite this Report
Karymsky Eastern Kamchatka Volcanic Arc	During 19-26 March seismicity was above background levels at Karymsky with 250-300 shallow earthquakes per day. Based on interpretations of seismic data, daily explosions may have produced ash-and-gas plumes to a height of ~3.5 km a.s.l. Karymsky remained at Concern Color Code Orange. Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Kikai (Japan) | 24 March-30 March 2004 | Continuing ActivityCite this Report
Kikai Ryukyu Volcanic Arc	Based on information from the Japanese Meteorological Agency, the Tokyo VAAC reported that Kikai erupted on 24 March at 1755 and on 25 March at 0715, producing plumes that reached a height of ~1.5 km a.s.l. and extended S and NW, respectively. No ash was visible on satellite imagery. Source: Tokyo Volcanic Ash Advisory Center (VAAC)
Kilauea (United States) | 24 March-30 March 2004 | Continuing ActivityCite this Report
Kilauea Hawaiian-Emperor Hotspot Volcano Group	During 24-30 March, two surface lava flows were active at the southern part of Kilauea's rootless-shield complex: the MLK flow and the Kuhio flow. The summit-deflation event that began on 20 March ended on 23 March, with only minor inflation and deflation events recorded after 23 March. A weak swarm of low-frequency earthquakes and a 2-hour period of moderate-to-strong volcano-tectonic earthquakes were recorded during 24-25 March. Overall, seismicity was at low levels during the reporting period. Source: US Geological Survey Hawaiian Volcano Observatory (HVO)
Popocatepetl (Mexico) | 24 March-30 March 2004 | Continuing ActivityCite this Report
Popocatepetl Trans-Mexican Volcanic Belt	Popocatépetl remained at a low level of activity for the reporting period, occasionally producing gas-and-steam plumes. On 25 March the volcanic alert status was lowered to Yellow-1. Source: Centro Nacional de Prevencion de Desastres (CENAPRED)
Santa Maria (Guatemala) | 24 March-30 March 2004 | Continuing ActivityCite this Report
Santa Maria Central America Volcanic Arc	Weak to moderate explosions at Santa María's Santiaguito lava dome produced plumes up to 1 km above the vent. Light ashfall occurred in nearby areas on several occasions during the reporting period. On 25 March incandescent avalanches derived from the S flank of the Caliente dome flowed to the SE along various routes. Lahars descended the Nimá I river on 28 March and the Nimá I and Nimá II rivers on the evening of 29 March. Source: Instituto Nacional de Sismologia, Vulcanologia, Meteorologia, e Hidrologia (INSIVUMEH)
Sheveluch (Russia) | 24 March-30 March 2004 | Continuing ActivityCite this Report
Sheveluch Eastern Kamchatka Volcanic Arc	During 19-26 March, seismic activity was above background levels at Shiveluch with many shallow earthquakes up to M 1.75 recorded. Based on interpretations of seismic data, a pyroclastic flow occurred on 19 March and explosions produced gas-and-ash plumes on 19-20 and 25 March that might have reached 6-7 km a.s.l. on two occasions and 3.5-4.5 km a.s.l. on nine other occasions. Shiveluch remained at Concern Color Code Orange. Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Soufriere Hills (United Kingdom) | 24 March-30 March 2004 | Continuing ActivityCite this Report
Soufriere Hills Lesser Antilles Volcanic Arc	During 19-26 March, activity remained elevated at Soufrière Hills. The seismic network recorded four long-period and seven hybrid earthquakes. Continuous low-level tremor was interrupted by several periods of moderate-level tremor lasting from less than 1 hour to 12 hours. Sulfur-dioxide flux ranged between 550 and 700 metric tons per day. On 29 March at 0745, the Washington VAAC reported that a ~9-km-wide ash plume was observed at a height of ~1 km a.s.l. The plume initially drifted SW until about 1015 the same day when it was observed in satellite imagery drifting NE. On 30 March an ash plume was observed that reached a height of ~2 km and drifted NE. Sources: Montserrat Volcano Observatory (MVO), Washington Volcanic Ash Advisory Center (VAAC)
Tungurahua (Ecuador) | 24 March-30 March 2004 | Continuing ActivityCite this Report
Tungurahua Andean Northern Volcanic Arc	Tungurahua remained at a low level of activity with constant degassing only interrupted by sporadic small explosions. During the night of 28-29 March incandescent material was observed avalanching on the upper slopes. Sources: Instituto Geofísico-Escuela Politécnica Nacional (IG-EPN), Washington 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.

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)