All times are local unless otherwise stated.

Hakoneyama (Japan) | 8 August-14 August 2001 | New Eruptive Activity Cite this Report
Hakoneyama Izu Volcanic Arc	Elevated seismicity had been recorded at Hakone during June 2001 to at least 8 August. The seismicity was associated with a small amount of inflation that was centered at the volcano. Earthquake hypocenters occurred at depths less than 5 km beneath the volcano. A small swarm was also recorded under the northern end of the Ashino-ko (caldera lake). JMA noted that the change in activity might not be a precursor to an eruption since similar activity has occurred in the past that was not followed by an eruption. Source: Volcano Research Center-Earthquake Research Institute (University of Tokyo)
Mayon (Philippines) | 8 August-14 August 2001 | New Eruptive Activity Cite this Report
Mayon Eastern Philippine Volcanic Arc	A decline in seismic and volcanic activity occurred at Mayon beginning on 8 August. The level of seismicity remained above background, but declined to non-eruptive conditions. The volcano's edifice was less inflated than during previous weeks. Continuing low-level activity in the crater area produced a high SO2 emission rate and visible incandescence. On 9 August PHIVOLCS decreased the Alert Level from 5 (the highest) to 4. The 6-km-radius Permanent Danger Zone and the 7-km-radius Extended Danger Zone remained in effect. Sources: Philippine Institute of Volcanology and Seismology (PHIVOLCS), Inquirer.net
Bezymianny (Russia) | 8 August-14 August 2001 | Continuing Eruptive Activity Cite this Report
Bezymianny Eastern Kamchatka Volcanic Arc	Volcanic activity decreased after an eruption at Bezymianny on 7 August at 1128. Later in the day, smaller explosions produced ash clouds that rose to 2 km above the dome. Seismic activity was above background levels on 7-8 August, with many small earthquakes occurring within the volcano's edifice and several different seismic signals (explosion, avalanche, collapse) recorded locally. On 9 August a three-pixel thermal anomaly was visible on satellite imagery. The anomaly represented a viscous lava flow that had formed at the dome of the volcano. On 9 August the Concern Color Code was reduced from Red (the highest level) to Yellow and was further reduced on 10 August to Green (the lowest level). Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Etna (Italy) | 8 August-14 August 2001 | Continuing Eruptive Activity Cite this Report
Etna Sicily Volcanic Province	As of 13 August lava flows appeared to cease advancing down the slopes of Etna. Slight degassing occurred from many of the fissures and the rate of SO2 emission was low in comparison to average values for the season. Sources: BBC News, Etna Volcan Sicilien (Charles Rivière)
Kīlauea (United States) | 8 August-14 August 2001 | Continuing Eruptive Activity Cite this Report
Kīlauea Hawaiian-Emperor Hotspot Volcano Group	Small amounts of lava continued to enter the ocean at the E Kupapaʻu entry. Surface lava flows were observed issuing from the eastern tube of the current flow field. One of the lobes of lava reached ~1.1 km short of the coast. Generally, weak, rather steady tremor and a few small earthquakes continued beneath Kīlauea's caldera. Near Puʻu ʻŌʻō, continuous tremor occurred at weak-to-moderate levels. Tiltmeters across the volcano showed no significant deformation. Source: US Geological Survey Hawaiian Volcano Observatory (HVO)
Pinatubo (Philippines) | 8 August-14 August 2001 | Continuing Eruptive Activity Cite this Report
Pinatubo Luzon Volcanic Arc	Several news reports stated that rising water in Pinatubo's crater is now approaching dangerous levels. If the water exceeds the crater lip, it could cause the crater to partially collapse and water could inundate the town of Botolan. The town is 40 km NW of the volcano and has 46,000 residents. In recent weeks the water surface has risen from ~6.4 to 5 m below the crater lip. Scientists are worried that the intense rain during the current rainy season will cause the water level to continue to rise. In the next few weeks, with oversight by Philippine officials and geologists, local residents will dig a 5-m notch in the side of the crater that will drain the water away from inhabited areas. Sources: Philippine Institute of Volcanology and Seismology (PHIVOLCS), Disaster Relief.org, Associated Press, Reuters
Popocatépetl (Mexico) | 8 August-14 August 2001 | Continuing Eruptive Activity Cite this Report
Popocatépetl Trans-Mexican Volcanic Arc	The number of small emissions composed of steam, gas, and small amounts of ash increased in comparison to the previous week. The Washington VAAC reported an ash emission on 9 August at 2300 produced an ash cloud that rose to 7.6 km a.s.l. According to CENAPRED, the increase in activity may have been related to several days of intense rain in the area. Sources: Centro Nacional de Prevencion de Desastres (CENAPRED), Washington Volcanic Ash Advisory Center (VAAC)
Sheveluch (Russia) | 8 August-14 August 2001 | Continuing Eruptive Activity Cite this Report
Sheveluch Eastern Kamchatka Volcanic Arc	During the week seismic activity remained above background levels, with many small earthquakes occurring within the volcano's edifice and several different seismic signals (explosion, avalanche, collapse) recorded locally. Small gas-and-steam plumes rose to 200 m above the dome. Thermal anomalies were seen in several areas on satellite imagery. The volcano remained at Concern Color Code Orange. Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Soufrière Hills (United Kingdom) | 8 August-14 August 2001 | Continuing Eruptive Activity Cite this Report
Soufrière Hills Lesser Antilles Volcanic Arc	During the week volcanic activity was low at Soufrière Hills. Small-scale rockfalls and minor pyroclastic flows occurred mainly off of the sides of the scar left after the partial dome collapse on 29 July. Like the previous week, a new dome was seen growing within the scar. Source: Montserrat Volcano Observatory (MVO)
Tungurahua (Ecuador) | 8 August-14 August 2001 | Continuing Eruptive Activity Cite this Report
Tungurahua Northern Andean Volcanic Arc	Ongoing eruptions occurred at Tungurahua since at least 6 August at 0703, sending steam-and-ash clouds to 7.5-11.6 km a.s.l. The ash clouds primarily drifted towards the W. On 13 August three particularly strong emissions occurred at about 0630, 1200, and 1315. Afterward, two distinct areas of ash were visible in satellite imagery; one contained ash from the strong emissions, rose to ~11.6 km a.s.l. and drifted to the E; the other ash cloud was fed from continuous emissions and possibly rose to ~10 km a.s.l. and drifted to the SW. Sources: Associated Press, Washington Volcanic Ash Advisory Center (VAAC), Instituto Geofísico-Escuela Politécnica Nacional (IG-EPN)
Villarrica (Chile) | 8 August-14 August 2001 | Continuing Eruptive Activity Cite this Report
Villarrica Southern Andean Volcanic Arc	Volcanic activity at Villarrica was at relatively normal levels as of 9 August. The amount of incandescent lava decreased in comparison to the amount observed during 19 and 22 July. Strong degassing occurred and ejections of ash, lapilli, and volcanic bombs landed on the W to SW edge of the crater. Source: Villarrica Volcano Visual Surveillance Project

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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