All times are local unless otherwise stated.

East Epi (Vanuatu) | 31 March-6 April 2004 | New Eruptive Activity Cite this Report
East Epi Vanuatu Volcanic Arc	According to a report from John Seach, an eruption at East Epi caldera in early March marked the first reported activity at the largely undersea caldera since 1988. Source: Volcano Live
Ambrym (Vanuatu) | 31 March-6 April 2004 | Continuing Eruptive Activity Cite this Report
Ambrym Vanuatu Volcanic Arc	According to a report from John Seach, during March an active lava lake was present in Ambrym's Mbwelesu crater. Source: Volcano Live
Anatahan (United States) | 31 March-6 April 2004 | Continuing Eruptive Activity Cite this Report
Anatahan Mariana Volcanic Arc	A seismic swarm began beneath Anatahan on 31 March. During 31 March to at least 4 April, volcanic seismicity was at its highest level since the eruption of May-June 2003, with events as large as M 2.5. The earthquakes were usually followed by tremor-like signals that scientists believed indicated steam and/or ash emissions to altitudes well below 1 km. As of 6 April, the seismic swarm continued to intensify slowly. Source: Emergency Management Office of the Commonwealth of the Mariana Islands and United States Geological Survey Volcano Hazards Program
Dukono (Indonesia) | 31 March-6 April 2004 | Continuing Eruptive Activity Cite this Report
Dukono Halmahera Volcanic Arc	During 31 March to 6 April, ash clouds emitted from Dukono were sometimes visible on satellite imagery at a height of ~3 km a.s.l. Source: Darwin Volcanic Ash Advisory Centre (VAAC)
Fuego (Guatemala) | 31 March-6 April 2004 | Continuing Eruptive Activity Cite this Report
Fuego Central America Volcanic Arc	During 31 March to 6 April, weak-to-moderate explosions continued at Fuego. The highest rising ash plume produced from the explosions reached ~1.2 km above the volcano on 5 April and drifted SSE. Lahars flowed down Seca Ravine on 30 March, and near the village of Sangre de Cristo on 3 April. During the report period, incandescent avalanches of volcanic material traveled down several ravines, including Santa Teresa, Ceniza, and Taniluyá. Source: Instituto Nacional de Sismologia, Vulcanologia, Meteorologia, e Hidrologia (INSIVUMEH)
Karymsky (Russia) | 31 March-6 April 2004 | Continuing Eruptive Activity Cite this Report
Karymsky Eastern Kamchatka Volcanic Arc	Seismicity remained above background levels at Karymsky during 26 March to 2 April, with 240-380 shallow earthquakes occurring per day. Based on interpretations of seismic data, plumes from ash-and-gas explosions may have reached 3.5 km a.s.l. every day. On 30 March ash deposits were seen extending SE and SW from the volcano. Karymsky remained at Concern Color Code Orange. Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Kīlauea (United States) | 31 March-6 April 2004 | Continuing Eruptive Activity Cite this Report
Kīlauea Hawaiian-Emperor Hotspot Volcano Group	During 31 March to 5 April, surface lava flows were visible at the southern part of Kīlauea's rootless-shield complex, which is along the Mother's Day lava tube several hundred meters S of Puʻu ʻŌʻō cone. Incandescence was also visible from several vents in the crater of Puʻu ʻŌʻō. Seismicity was at low levels at Kīlauea's summit, and tremor at Puʻu ʻŌʻō remained moderate. During the report period, there were episodes of inflation and deflation at Uwekahuna and Puʻu ʻŌʻō. Source: US Geological Survey Hawaiian Volcano Observatory (HVO)
Santa María (Guatemala) | 31 March-6 April 2004 | Continuing Eruptive Activity Cite this Report
Santa María Central America Volcanic Arc	During 31 March to 6 April, weak-to-moderate explosions continued at Santa Maria's Santiaguito lava-dome complex, producing plumes to 1.3 km above the volcano. Several partial lava-dome collapses produced avalanches down the volcano's S flank. A strong explosion on 1 April at 1706 caused a partial lava-dome collapse and produced a pyroclastic flow that traveled ~4 km SW toward the Nimá II river. Source: Instituto Nacional de Sismologia, Vulcanologia, Meteorologia, e Hidrologia (INSIVUMEH)
Sheveluch (Russia) | 31 March-6 April 2004 | Continuing Eruptive Activity Cite this Report
Sheveluch Eastern Kamchatka Volcanic Arc	According to KVERT, during 26 March to 2 April seismicity was above background levels at Shiveluch. About 14 shallow earthquakes up to M 2 occurred during 25 and 28-31 March. Based on interpretations of seismic data, 15 ash-and-gas explosions may have produced plumes to 5 km a.s.l. during 25 and 28-31 March. Shiveluch remained at Concern Color Code Orange. Sources: Itar-Tass News, Kamchatkan Volcanic Eruption Response Team (KVERT), RIA Novosti
Soufrière Hills (United Kingdom) | 31 March-6 April 2004 | Continuing Eruptive Activity Cite this Report
Soufrière Hills Lesser Antilles Volcanic Arc	Seismic and volcanic activity were at moderate levels at Soufrière Hills during 26 March to 2 April. Seismicity was dominated by near-continuous low-to-moderate tremor. Vigorous steam venting was visible from several areas of the crater, but no new lava-dome growth occurred. The sulfur-dioxide flux remained at moderate levels. Sources: Montserrat Volcano Observatory (MVO), Washington Volcanic Ash Advisory Center (VAAC)
Tungurahua (Ecuador) | 31 March-6 April 2004 | Continuing Eruptive Activity Cite this Report
Tungurahua Northern Andean Volcanic Arc	During 30 March to 3 April, volcanic activity at Tungurahua was at relatively low levels, but emissions of steam and ash occurred and incandescence was visible in the crater. On 4 April at 1902 an explosion produced a plume containing a moderate amount of ash that rose to 800 m above the crater. Sources: Washington Volcanic Ash Advisory Center (VAAC), Instituto Geofísico-Escuela Politécnica Nacional (IG-EPN)
Yasur (Vanuatu) | 31 March-6 April 2004 | Continuing Eruptive Activity Cite this Report
Yasur Vanuatu Volcanic Arc	According to a report from John Seach, eruptive activity at Yasur continued at "normal" levels during March, with an average of 500 explosions occurring per day. Source: Volcano Live

Since the Weekly Volcanic Activity Report began in November 2000, there have been 22,859 individual reports over 1,335 weeks (average of 17 per week) on 351 different volcanoes.

Search by Date

Use the dropdowns to choose the year and week for archived Weekly Reports.

Use the dropdowns to choose the year and week for archived Weekly Reports.

Year   --- 2026 2025 2024 2023 2022 2021 2020 2019 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 2008 2007 2006 2005 2004 2003 2002 2001 2000      Week   ---     

Search by Volcano

RSS Feed, CAP Feed, and Google Earth Placemarks

The RSS (Really Simple Syndication) feed is identical to the Weekly Volcanic Activity Report minus some features including the header information (latitude and longitude and summit elevation), the Geological Summary, and a link to the GVP volcano profile page. At the end of each report is a list of the sources used. Each report includes a link from the volcano's name back to the more complete information on the GVP website.

The CAP (Common Alerting Protocol) feeds are XML files specifically formatted for disaster management. They are similar in content to the RSS feed, but contain no active links.

Loading the network link into Google Earth will automatically load placemarks for volcanoes in the current weekly report. Placemark balloons include the volcano name, report date, report text, sources, and links back to the GVP volcano profile page and to the complete Weekly Report for that week.

Download Smithsonian / USGS Weekly Volcanic Activity Report Network RSS Feed

Download Smithsonian / USGS Weekly Volcanic Activity Report Network CAP Feed

Download Smithsonian / USGS Weekly Volcanic Activity Report Network Link

Criteria

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 essentially continuous eruptive activity for decades or longer, and such routine activity is typically not reported here. Submarine activity is reported when information is available. 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.

Reports categorized as "Activity (New)" indicate eruptive activity that has occurred after at least 3 months of quiescence. Once a volcano is included in this section, updates will remain on that list unless the activity continues for more than 1 month without escalating, after which time updates will be listed in the "Activity (Continuing)" section. Reports are included in the "Unrest" sections (New or Continuing) if the volcano is undergoing non-eruptive activity such as seismicity or deformation that is unusually high for that volcano or is increasing. The "Other" category includes non-eruptive and non-unrest reports, such as Alert Level decreases or previous ash deposits resuspended by winds. Reports through 2025 were only divided into "New Activity/Unrest" and "Continuing Activity", which have been automatically converted to the "Activity (New)" and "Activity (Continuing)" groups, respectively, without a review of content that might change the category to "Unrest" or "Other".

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 have the relevant information at the time.

Disclaimers

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. 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