All times are local unless otherwise stated.

Karymsky (Russia) | 31 January-6 February 2007 | Continuing Eruptive Activity Cite this Report
Karymsky Eastern Kamchatka Volcanic Arc	Seismic activity at Karymsky was above background levels during 26 January-2 February, with 250-300 shallow earthquakes occurring daily. Ash plumes may have reached altitudes of 3.0 km (9,900 ft) a.s.l. during the reporting period. The Level of Concern Color Code remained at Orange. Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Kīlauea (United States) | 31 January-6 February 2007 | Continuing Eruptive Activity Cite this Report
Kīlauea Hawaiian-Emperor Hotspot Volcano Group	During 31 January-6 February, lava from Kīlauea continued to flow from lava deltas into the ocean at the East Laeʻapuki, Kamokuna, and East Kaʻiliʻili entries. Incandescence was intermittently visible on the pali and from several vents in Puʻu ʻŌʻō's crater. Tremor near Puʻu ʻŌʻō continued at low levels. Source: US Geological Survey Hawaiian Volcano Observatory (HVO)
Rabaul (Papua New Guinea) | 31 January-6 February 2007 | Continuing Eruptive Activity Cite this Report
Rabaul Bismarck Volcanic Arc	RVO reported that on 31 January, a large explosion from Rabaul caldera's Tavurvur cone produced a shockwave. The flanks were showered with lava fragments and an ash plume rose a few hundred meters above the summit and drifted SE and E. Two more explosions occurred later that day. During 31 January-6 February, emissions of steam and of variable amounts of ash produced plumes that rose to a maximum altitude of 2.2 km (7,200 ft) a.s.l. and drifted NE, SE, and E. Roaring noises were audible on 4 February. Source: Rabaul Volcano Observatory (RVO)
Sangay (Ecuador) | 31 January-6 February 2007 | Continuing Eruptive Activity Cite this Report
Sangay Northern Andean Volcanic Arc	Based on information from the Guayaquil MWO and satellite imagery, the Washington VAAC reported that an eruption from Sangay on 6 February produced ash plumes that rose to a maximum altitude of 9.1 km (30,000 ft) a.s.l. and drifted SW. Source: Washington Volcanic Ash Advisory Center (VAAC)
Santa María (Guatemala) | 31 January-6 February 2007 | Continuing Eruptive Activity Cite this Report
Santa María Central America Volcanic Arc	INSIVUMEH reported that explosions from Santa María's Santiaguito lava dome complex on 31 January and 5 February produced ash plumes that rose to altitudes of 4.8 km (15,700 ft) a.s.l. On 5 February, plumes drifted SW and S causing ashfall downwind. Block-and-ash avalanches descended the SW and S flanks of Caliente Dome. Fumarolic plumes drifted SW. Based on satellite imagery, the Washington VAAC reported that ash plumes drifted SW on 31 January and W on 2 February. Sources: Instituto Nacional de Sismologia, Vulcanologia, Meteorologia, e Hidrologia (INSIVUMEH), Washington Volcanic Ash Advisory Center (VAAC)
Sheveluch (Russia) | 31 January-6 February 2007 | Continuing Eruptive Activity Cite this Report
Sheveluch Eastern Kamchatka Volcanic Arc	Activity at Shiveluch continued above background levels during 26 January-2 February, with over 140 shallow earthquakes occurring daily. Based on seismic interpretation, observation, and video data, gas-and-ash plumes rose 3.5-4.5 km (11,500-14,800 ft) a.s.l. throughout the reporting period. Plumes drifted ESE. A large thermal anomaly was visible on satellite imagery. The Tokyo VAAC reported ash plumes that rose to an altitude of 4.3 km (14,000 ft) a.s.l. on 1 February were visible on satellite imagery drifting E. An eruption occurred on 6 February that was not visible on satellite imagery. The Level of Concern Color Code remained at Orange. Sources: Tokyo Volcanic Ash Advisory Center (VAAC), Kamchatkan Volcanic Eruption Response Team (KVERT)
Soufrière Hills (United Kingdom) | 31 January-6 February 2007 | Continuing Eruptive Activity Cite this Report
Soufrière Hills Lesser Antilles Volcanic Arc	Based on satellite imagery, the MVO, and pilot reports, the Washington VAAC reported that a diffuse plume from Soufrière Hills rose to an altitude of 1.5 km (5,000 ft) a.s.l. and drifted WNW on 31 January. Measurable activity was low and visual observations were limited due to cloud cover. On 6 January, a photograph taken from a helicopter showed that the dome had continued to grow towards the W side of the crater. Sources: Montserrat Volcano Observatory (MVO), Washington Volcanic Ash Advisory Center (VAAC)
St. Helens (United States) | 31 January-6 February 2007 | Continuing Eruptive Activity Cite this Report
St. Helens High Cascades Volcanic Arc	Data from deformation-monitoring instruments showed that during 31 January-6 February, a spine on the lava dome at Mount St. Helens continued to grow. Seismicity continued at low levels, punctuated by M 1.5-2.5 and occasionally larger earthquakes. Source: US Geological Survey Cascades Volcano Observatory (CVO)
Suwanosejima (Japan) | 31 January-6 February 2007 | Continuing Eruptive Activity Cite this Report
Suwanosejima Ryukyu Volcanic Arc	Based on information from JMA and satellite imagery, the Tokyo VAAC reported that an explosion from Suwanose-jima produced an eruption plume during 5-6 February. The altitude and direction of the plume were not reported. Source: Tokyo Volcanic Ash Advisory Center (VAAC)
Ubinas (Peru) | 31 January-6 February 2007 | Continuing Eruptive Activity Cite this Report
Ubinas Central Andean Volcanic Arc	Based on pilot reports, the Buenos Aires VAAC reported continuous emissions from Ubinas on 2 and 5 February. Ash plumes rose to 5.5 km (18,000 ft) a.s.l. and drifted SW and S, respectively. Source: Buenos Aires 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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