All times are local unless otherwise stated.

Eyjafjallajökull (Iceland) | 24 March-30 March 2010 | New Eruptive Activity Cite this Report
Eyjafjallajökull Iceland Neovolcanic Rift Volcanic Province	According to news articles, the fissure eruption from Eyjafjöll continued during 24-30 March. On 24 March, steam explosions were seen. A local scientist described four or five active craters and a 200-meter-high basalt lava-fall into Hrunagil canyon. Two days later reports indicated that lava flows had changed course and had entered the Hvannárgil canyon down a 100-meter-high lava-fall; water levels in that drainage increased. From a helicopter on 28 March, scientists saw lava flowing into both canyons and noted fewer jets of lava. The next evening a swarm of earthquakes in the region measuring M 2-2.5 were detected. A geophysicist noted that seismicity was gradually decreasing. The lava covered an area of 1 square kilometer. Sources: Iceland Review, Iceland Review, Iceland Review, Iceland Review
Karymsky (Russia) | 24 March-30 March 2010 | New Eruptive Activity Cite this Report
Karymsky Eastern Kamchatka Volcanic Arc	KVERT reported that seismic activity from Karymsky increased on 25 March. Two days later, an intense thermal anomaly over the volcano was seen in satellite imagery. During 28-29 March ash plumes were seen in the area of the volcano. The Aviation Color Code level was raised to Orange. Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Mauna Loa (United States) | 24 March-30 March 2010 | New Eruptive Activity Cite this Report
Mauna Loa Hawaiian-Emperor Hotspot Volcano Group	On 30 March, HVO reported that the Aviation Color Code and the Volcano Alert Level for Mauna Loa were both lowered to Green and Normal, respectively. Deformation had not been noted since mid-2009 and seismicity was at normal levels. Source: US Geological Survey Hawaiian Volcano Observatory (HVO)
Aira (Japan) | 24 March-30 March 2010 | Continuing Eruptive Activity Cite this Report
Aira Ryukyu Volcanic Arc	The Tokyo VAAC reported that during 24-30 March explosions from Sakura-jima sometimes produced plumes identified on satellite imagery. Those plumes, along with ash plumes occasionally seen by pilots, rose to altitudes of 1.5-2.7 km (5,000-9,000 ft) a.s.l. and drifted SW, S, SE, and E. Source: Tokyo Volcanic Ash Advisory Center (VAAC)
Batu Tara (Indonesia) | 24 March-30 March 2010 | Continuing Eruptive Activity Cite this Report
Batu Tara Sunda Volcanic Arc	Based on analyses of satellite imagery, the Darwin VAAC reported that during 24-26 March ash plumes from Batu Tara rose to an altitude of 2.4 km (8,000 ft) a.s.l. and drifted about 10-120 km W, NW, and NE. Source: Darwin Volcanic Ash Advisory Centre (VAAC)
Chaitén (Chile) | 24 March-30 March 2010 | Continuing Eruptive Activity Cite this Report
Chaitén Southern Andean Volcanic Arc	Based on analyses of satellite imagery, the Buenos Aires VAAC reported that a plume from Chaitén's lava-dome complex drifted 20 km SW on 29 March. Source: Buenos Aires Volcanic Ash Advisory Center (VAAC)
Kīlauea (United States) | 24 March-30 March 2010 | Continuing Eruptive Activity Cite this Report
Kīlauea Hawaiian-Emperor Hotspot Volcano Group	During 24-30 March, HVO reported incandescence from an active lava surface about 200 m below a vent in the floor of Kīlauea's Halemaʻumaʻu crater. The lava surface circulated and both rose and drained through a pit in the cavity floor. Plumes from the vent drifted mainly SW, dropping small amounts of ash, and occasionally spatter, downwind. Gas measurements on 25 and 26 March indicated that the sulfur dioxide emission rate at the summit remained elevated at 600 and 800 tonnes per day, respectively. The 2003-2007 average rate was 140 tonnes per day. Lava from beneath the Thanksgiving Eve Breakout (TEB) and rootless shield complex flowed SE through the upper portion of a lava tube system and broke out onto the surface. Thermal anomalies detected by satellite, and visual observations, revealed active lava flows above the pali. Source: US Geological Survey Hawaiian Volcano Observatory (HVO)
Klyuchevskoy (Russia) | 24 March-30 March 2010 | Continuing Eruptive Activity Cite this Report
Klyuchevskoy Eastern Kamchatka Volcanic Arc	KVERT reported that during 19-29 March seismic activity from Kliuchevskoi was above background levels. Strombolian activity ejected material 100-300 m above the crater and lava continued to flow down the flanks. Satellite imagery revealed a large daily thermal anomaly from the volcano, and gas-and-steam plumes that drifted over 80 km E during 18-20 March. Ash plumes seen in satellite imagery drifted about 75 km NE on 21 and 24 March. The Aviation Color Code level remained at Orange. Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Llaima (Chile) | 24 March-30 March 2010 | Continuing Eruptive Activity Cite this Report
Llaima Southern Andean Volcanic Arc	SERNAGEOMIN reported that seismicity from Llaima had generally decreased during 5-22 March, to levels detected prior to an earthquake on 27 February. A significant number of earthquakes that indicated fluid movement in the volcano continued to be registered. Gas-and-steam plumes rose 100 m from their source. The Alert Level was lowered to Yellow, (Level 3) on a three-color scale. Source: Servicio Nacional de Geología y Minería (SERNAGEOMIN)
Santa María (Guatemala) | 24 March-30 March 2010 | Continuing Eruptive Activity Cite this Report
Santa María Central America Volcanic Arc	On 29 March, INSIVUMEH reported that explosions from Santa María's Santiaguito lava dome complex produced ash plumes that rose to altitudes of 3-3.3 km (10,000-10,800 ft) a.s.l. and drifted W over inhabited areas. Avalanches from a lava flow descended the SW flank. The Washington VAAC reported that on 30 March a diffuse ash plume seen in satellite imagery drifted between the NW and NE. Sources: Washington Volcanic Ash Advisory Center (VAAC), Instituto Nacional de Sismologia, Vulcanologia, Meteorologia, e Hidrologia (INSIVUMEH)
Sheveluch (Russia) | 24 March-30 March 2010 | Continuing Eruptive Activity Cite this Report
Sheveluch Eastern Kamchatka Volcanic Arc	KVERT reported that during 19-29 March seismic activity from Shiveluch was above background levels, possibly indicating ash plumes rising to an altitude of 4.2 km (13,800 ft) a.s.l. Hot avalanches from the lava dome were seen at night. On 22 March, seismic signals detected an explosion that may have produced an ash plume rising to an altitude of 7 km (23,000 ft) a.s.l. Satellite imagery revealed a large daily thermal anomaly from the volcano, and ash plumes that drifted over 40 km NE on 21 March. The Aviation Color Code level remained at Orange. Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Soufrière Hills (United Kingdom) | 24 March-30 March 2010 | Continuing Eruptive Activity Cite this Report
Soufrière Hills Lesser Antilles Volcanic Arc	MVO reported that during 19-26 March activity from the Soufrière Hills lava dome was at a low level. Small-to-moderate-sized pyroclastic flows on the W and S flanks occurred sporadically. The largest pyroclastic flow traveled 2 km W down Spring Ghaut on 25 March. The Hazard Level remained at 3. Source: Montserrat Volcano Observatory (MVO)
Suwanosejima (Japan) | 24 March-30 March 2010 | Continuing Eruptive Activity Cite this Report
Suwanosejima Ryukyu Volcanic Arc	Based on information from JMA, the Tokyo VAAC reported an explosion from Suwanose-jima on 29 March. Details of possible resulting plumes were not reported. Source: Tokyo Volcanic Ash Advisory Center (VAAC)

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.

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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.

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.

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