All times are local unless otherwise stated.

Colima (Mexico) | 10 March-16 March 2004 | Continuing Eruptive Activity Cite this Report
Colima Trans-Mexican Volcanic Arc	Based on information from the Mexico City MWO, the Washington VAAC reported that an emission from Colima on 15 March at 2014 reached ~4.3 km a.s.l. No ash was visible on satellite imagery. Source: Washington Volcanic Ash Advisory Center (VAAC)
Dukono (Indonesia) | 10 March-16 March 2004 | Continuing Eruptive Activity Cite this Report
Dukono Halmahera Volcanic Arc	According to the Darwin VAAC, an ash plume from Dukono was visible on satellite imagery on 14 March at a height of ~4.6 km a.s.l. extending SE. Source: Darwin Volcanic Ash Advisory Centre (VAAC)
Etna (Italy) | 10 March-16 March 2004 | Continuing Eruptive Activity Cite this Report
Etna Sicily Volcanic Province	INGV-CT reported that, following the last eruption of Etna on 28 January 2003, no further eruptive activity had been observed as of 8 March 2004. Summit activity was limited to pulsating gas emissions from Northeast Crater and from one of the two vents within Bocca Nuova crater. The other central crater vents and Southeast Crater were essentially blocked, producing only extremely weak gas emissions. The first significant variation from this very low level of activity occurred between 12 and 14 February 2004, when a weak ash emission was observed within the summit crater plume. The high amount of juvenile components within the ash suggested an uprise of magma into the summit feeder conduit of the volcano, the first to occur since the end of the 2002-2003 flank eruption. Since January, several shallow earthquakes have been recorded at Pernicana fault on the volcano's NE flank. Source: Sezione di Catania - Osservatorio Etneo (INGV)
Fuego (Guatemala) | 10 March-16 March 2004 | Continuing Eruptive Activity Cite this Report
Fuego Central America Volcanic Arc	During 9-15 March, moderate-to-strong explosions continued at Fuego, producing ash plumes to a maximum height of 1.7 km above the volcano. Incandescent avalanches of volcanic material traveled as far as 600 m down ravines on the volcano's W, SW, and S flanks and ash fell in villages from Sangre de Cristo to Panimaché. Source: Instituto Nacional de Sismologia, Vulcanologia, Meteorologia, e Hidrologia (INSIVUMEH)
Karymsky (Russia) | 10 March-16 March 2004 | Continuing Eruptive Activity Cite this Report
Karymsky Eastern Kamchatka Volcanic Arc	Seismicity was above background levels at Karymsky during 5-12 March, with 200-370 shallow earthquakes occurring. Based on interpretations of seismic data, daily ash-and-gas explosions may have reached 3 km a.s.l. Karymsky remained at Concern Color Code Orange. Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Kīlauea (United States) | 10 March-16 March 2004 | Continuing Eruptive Activity Cite this Report
Kīlauea Hawaiian-Emperor Hotspot Volcano Group	During 11-15 March most lava flows at Kīlauea were emitted from the lower and upper ends of the rootless shield complex, which is along the Mother's Day lava tube south of Puʻu ʻŌʻō cone. On 4 March, a lava flow began to issue from vents at the S base of Puʻu ʻŌʻō and traveled ~3 km S. This flow was sporadically active through 15 March. During the report period, very weak background tremor continued at Kīlauea's summit along with a few long-period earthquakes. Tremor at Puʻu ʻŌʻō remained at moderate levels. Small periods of inflation and deflation occurred. Source: US Geological Survey Hawaiian Volcano Observatory (HVO)
Santa María (Guatemala) | 10 March-16 March 2004 | Continuing Eruptive Activity Cite this Report
Santa María Central America Volcanic Arc	During 10-15 March, small-to-medium explosions occurred at Santa María's Santiaguito lava-dome complex, producing ash-and-gas plumes to ~1.3 km above the crater. A small partial lava-dome collapse on 10 March at 0733 produced pyroclastic flows down the volcano's SSW flank. During the rest of the report period, weak avalanches of volcanic material traveled S and SW from the volcano. Source: Instituto Nacional de Sismologia, Vulcanologia, Meteorologia, e Hidrologia (INSIVUMEH)
Sheveluch (Russia) | 10 March-16 March 2004 | Continuing Eruptive Activity Cite this Report
Sheveluch Eastern Kamchatka Volcanic Arc	Seismicity at Shiveluch was above background levels during 5-12 March, with a large number of shallow earthquakes up to M 2 occurring beneath the volcano. Based on interpretations of seismic data, ash-and-gas explosions rose to a maximum height of ~6 km a.s.l. Video footage shot on 9 March showed an ash plume rising to ~4 km a.s.l. and drifting S. Shiveluch remained at Concern Color Code Orange. Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Soufrière Hills (United Kingdom) | 10 March-16 March 2004 | Continuing Eruptive Activity Cite this Report
Soufrière Hills Lesser Antilles Volcanic Arc	Following a lava-dome collapse at Soufrière Hills on 3 March, activity was relatively lower during 5-12 March. Around 0330 on 10 March a short period of elevated seismic activity lasting around 10-20 minutes occurred. Later that day fresh pyroclastic-flow deposits were observed toward the NE in the upper reaches of the Tar River Valley. Several short periods of ash-and-steam venting were observed during 9-12 March, with ash deposited as far N as St. Georges Hill. The sulfur-dioxide flux peaked at 1,250 metric tons on 9 March. Sources: Washington Volcanic Ash Advisory Center (VAAC), Montserrat Volcano Observatory (MVO)
Stromboli (Italy) | 10 March-16 March 2004 | Continuing Eruptive Activity Cite this Report
Stromboli Aeolian Volcanic Arc	INGV-CT reported that explosive activity at Stromboli's three summit craters increased after 10 February, leading to significant growth of the cinder cones inside the craters. Several powerful explosions, especially from Crater 1 (the NE crater) and Crater 3 (the SW crater), sent scoriae 200 m above the craters. These powerful explosions led to fallout of fresh bombs and lapilli on Il Pizzo Sopra la Fossa (an area atop the volcano about 100 m above the crater terrace) in early March. As of 8 March, Strombolian activity was occurring at the volcano, with variations in the number and frequency of explosions within normally observed limits, and the intensity of explosions at the higher limit of commonly observed activity. Source: Sezione di Catania - Osservatorio Etneo (INGV)
Tungurahua (Ecuador) | 10 March-16 March 2004 | Continuing Eruptive Activity Cite this Report
Tungurahua Northern Andean Volcanic Arc	During 11-15 March, degassing continued at Tungurahua with occasional explosions of steam, gas, and ash. On 11 March a lahar traveled in the Pampas sector. Sources: Washington Volcanic Ash Advisory Center (VAAC), Instituto Geofísico-Escuela Politécnica Nacional (IG-EPN)

Since the Weekly Volcanic Activity Report began in November 2000, there have been 22,882 individual reports over 1,336 weeks (average of 17 per week) on 351 different volcanoes.

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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.

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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.

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