All times are local unless otherwise stated.

Cleveland (United States) | 28 February-6 March 2001 | New Activity / Unrest Cite this Report
Cleveland Aleutian Ridge Volcanic Arc	The AVO reported that no further eruptive activity was observed or detected at Cleveland since the 19 February eruption. During 19 February to 2 March, GOES-10 imagery showed a weak thermal anomaly that was probably related to hot material deposited on the flanks of the volcano on the 19th. Photographs taken a few days after the eruption showed significant accumulation of spatter and lava blocks high on the steep flanks of the volcano; occasional avalanching of this debris may produce small, localized ash plumes. Source: US Geological Survey Alaska Volcano Observatory (AVO)
Klyuchevskoy (Russia) | 28 February-6 March 2001 | New Activity / Unrest Cite this Report
Klyuchevskoy Eastern Kamchatka Volcanic Arc	Based on satellite imagery and pilot reports, the Tokyo VAAC reported that an eruption may have occurred at Kliuchevskoi. The ash cloud produced from the eruption rose to a height of ~9.5 km and was visible on GMS-5 imagery at 1532 on 4 March. By 1832 the same day the ash cloud was no longer visible on satellite imagery. Source: Tokyo Volcanic Ash Advisory Center (VAAC)
Lokon-Empung (Indonesia) | 28 February-6 March 2001 | New Activity / Unrest Cite this Report
Lokon-Empung Sangihe Volcanic Arc	The VSI reported that following the 28 January eruption, activity decreased at Lokon-Empung with only small steam emissions occurring. A small tectonic earthquake (M 1) was reported in the area. The volcano remained at Alert Level 3 (on a scale of 1-4). Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)
Mayon (Philippines) | 28 February-6 March 2001 | New Activity / Unrest Cite this Report
Mayon Eastern Philippine Volcanic Arc	PHIVOLCS reported that during 28 February to 6 March, 15 to 50 low-frequency earthquakes were recorded daily. An average of 1,855 metric tons per day (t/d) of SO2 was recorded during the previous week, which was significantly above the baseline value of 500 t/d. A slight inflationary trend was detected at the volcano's edifice, no incandescence was observed at the crater, and weak-to-moderate steaming was occasionally seen. Mayon remained at Alert Level 3 (on a scale of 0-5). Source: Philippine Institute of Volcanology and Seismology (PHIVOLCS)
Merapi (Indonesia) | 28 February-6 March 2001 | New Activity / Unrest Cite this Report
Merapi Sunda Volcanic Arc	Based on reports from the VSI, the Darwin VAAC stated that the Alert Level at Merapi was downgraded on 25 February from 4, the highest level, to 3. Source: Darwin Volcanic Ash Advisory Centre (VAAC)

Etna (Italy) | 28 February-6 March 2001 | Continuing ActivityCite this Report
Etna Sicily Volcanic Province	According to the Italy's Volcanoes website, during late February fluctuating eruptive activity continued at Etna's summit craters. Strombolian activity continued at two vents in Bocca Nuova Crater and within the central pit of Northeast Crater. In addition, lava continued to slowly flow from the NNE flank of the Southeast Crater. Source: Italy's Volcanoes
Ijen (Indonesia) | 28 February-6 March 2001 | Continuing ActivityCite this Report
Ijen Sunda Volcanic Arc	During 20-26 February, the number of earthquakes recorded was relatively high; 42 shallow volcanic earthquakes and five tectonic earthquakes were detected. The volcano remained at Alert Level 2 (on a scale of 1-4). Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)
Kilauea (United States) | 28 February-6 March 2001 | Continuing ActivityCite this Report
Kilauea Hawaiian-Emperor Hotspot Volcano Group	Lava continued to flow down Pulama pali without reaching the sea. Overall, volcanic tremor near Pu`u `O`o was low-to-moderate and tremor at Kilauea's caldera was low. Tiltmeters in the summit area and along the E rift zone showed flat signals. Source: US Geological Survey Hawaiian Volcano Observatory (HVO)
Popocatepetl (Mexico) | 28 February-6 March 2001 | Continuing ActivityCite this Report
Popocatepetl Trans-Mexican Volcanic Belt	CENAPRED reported that activity remained relatively low at Popocatépetl during the week, with small exhalations accompanied by steam emissions. The volcano remained at Alert Level Yellow Phase III, with a restricted area of 12-km-radius. Source: Centro Nacional de Prevencion de Desastres (CENAPRED)
Semeru (Indonesia) | 28 February-6 March 2001 | Continuing ActivityCite this Report
Semeru Sunda Volcanic Arc	The VSI reported that a small steam plume rose ~100 m above Semeru's summit and that seismicity was dominated by 702 explosion earthquakes. In addition to the explosion earthquakes, three deep volcanic, 58 avalanche, and five tectonic earthquakes occurred. The volcano remained at Alert Level 2 (on a scale of 1 to 4). Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)
Sheveluch (Russia) | 28 February-6 March 2001 | Continuing ActivityCite this Report
Sheveluch Eastern Kamchatka Volcanic Arc	The KVERT reported that during 25-27 February there was an increase in seismic activity. Two- and three-minute-long series of shallow earthquakes were registered and followed by weak volcanic tremor. These outbursts may have corresponded to weak ash-and-gas explosions that reached a height of ~2 km above the crater. On 23, 24, and 28 February gas-and-steam plumes rose 250-600 m above the volcano. The Concern Color Code remained at Yellow. Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Soufriere Hills (United Kingdom) | 28 February-6 March 2001 | Continuing ActivityCite this Report
Soufriere Hills Lesser Antilles Volcanic Arc	The MVO reported that during 23 February to 2 March activity at the Soufrière Hills volcano increased with a marked change in the character of the seismicity, a change in the direction of lava dome growth, and moderate levels of pyroclastic flow activity. An unusually large number of hybrid earthquakes (388) were recorded during the week. On 24 February dome growth was concentrated on the NE side of the lava dome, but the next day the area of growth changed to the S side of the dome. After the change in activity, a small collapse occurred towards the SW down the White River Valley and produced small pyroclastic flows that stopped just short of the sea and started fires in Shooters Hill. Throughout the rest of the week rockfalls and small pyroclastic flows traveled to the top of the White River Valley, with only occasional ones traveling in other directions. This activity was accompanied by banded tremor and weak hybrid earthquakes. The Washington VAAC reported that throughout the week low-level ash clouds (up to ~3 km a.s.l.), presumably produced by rockfalls, and periodic hot-spot activity were visible on GOES-8 imagery. Sources: Washington Volcanic Ash Advisory Center (VAAC), Montserrat Volcano Observatory (MVO)

Weekly Reports Archive

Since the Weekly Volcanic Activity Report began in November 2000, there have been 20,322 individual reports over 1,229 weeks (average of 17 per week) on 336 different volcanoes.

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

 News Feeds and Google Placemarks

 Criteria & Disclaimers

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 more-or-less continuous eruptive activity for decades or longer, and such routine activity is typically not reported here. Moreover, Earth's sea-floor volcanism is seldom reported even though in theory it represents the single most prolific source of erupted material. 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.

Volcanoes are included in the "New Activity/Unrest" section of the Weekly Volcanic Activity Report if the activity occurs after at least 3 months of quiescence. Once a volcano is included in the "New Activity/Unrest" section, updates will remain in that section unless the activity continues for more than 1 month without escalating, after which time updates will be listed in the "Continuing Activity" section. Volcanoes are also included in the "New Activity/Unrest" section if the volcano is undergoing a period of relatively high unrest, or increasing unrest. This is commonly equal to Alert Level Orange on a scale of Green, Yellow, Orange, Red, where Red is the highest alert. Or alert level 3 on a scale of 1-4 or 1-5.

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 receive a report.

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. Because of our emphasis on rapid reporting on the web we have avoided diacritical marks. 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.

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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

 Acronyms and Abbreviations

a.s.l. - above sea level

AVO - Alaska Volcano Observatory

AVHRR - Advanced Very High Resolution Radiometer

CENAPRED - Centro Nacionale de Prevencion de Desastres (México)

CONRED - Coordinadora Nacional para la Reducción de Desastres

COSPEC - Correlation Spectrometer

CVGHM (formerly VSI) - Center of Volcanology and Geological Hazard Mitigation

CVO - Cascades Volcano Observatory (USGS)

GMS - Geostationary Meteorological Satellite

GOES - Geostationary Operational Environmental Satellite

GVO - Goma Volcano Observatory

GVP - Global Volcanism Program (Smithsonian Institution)

HVO - Hawaiian Volcano Observatory (USGS)

ICE - Instituto Costarricense de Electricidad (Costa Rica)

IG - Instituto Geofísico (Ecuador)

IGNS - Institute of Geological and Nuclear Sciences (New Zealand) - now GNS Science

INETER - Instituto Nicaragüense de Estudios Territoriales (Nicaragua)

INGEMMET - Instituto Geológical Minero y Metalúrgico (Peru)

INGEOMINAS - Instituto Colombiano de Geología y Minería (Colombia)

INGV-CT - Istituto Nazionale di Geofisica e Vulcanologia - Sezione di Catania (Italy)

INSIVUMEH - Instituto Nacional de Sismologia, Vulcanologia, Meteorologia e Hidrologia (Guatemala)

IRD - Institut de Recherche pour le Développement (France)

JMA - Japanese Meteorological Agency

KEMSD - Kamchatkan Experimental and Methodical Seismilogical Department

KVERT - Kamchatkan Volcanic Eruption Response Team

M - magnitude

METEOSAT - Meteorological Satellite

MEVO - Mount Erebus Volcano Observatory

MODIS - Moderate Resolution Imaging Spectroradiometer

MVO - Montserrat Volcano Observatory

MWO - Meteorological Watch Office

NEIC - National Earthquake Information Center

NIED - National Research Institute for Earth Science and Disaster Prevention (Japan)

NOAA - National Oceanic and Atmospheric Administration

NOTAM - Notice to Airmen

OVDAS - Observatorio Volcanologico de los Andes del Sur (Chile)

OFDA - Office of US Foreign Disaster Assistance

ONEMI - Oficina Nacional de Emergencia - Ministerio del Interior (Chile)

OVPDLF - Observatoire Volcanologique du Piton de la Fournaise (France)

OVSICORI-UNA - Observatorio Vulcanologico y Sismologico de Costa Rica, Universidad Nacional (Costa Rica)

PHIVOLCS - Philippine Institute of Volcanology and Seismology (Philippines)

RSAM - Real-time Seismic Amplitude Measurement

RVO - Rabaul Volcano Observatory

SERNAGEOMIN - Servicio Nacional de Geologia y Mineria (Chile)

SIGMET - Significant Meteorological Information

SNET - Servicio Nacional de Estudios Territoriales (El Salvador)

SVERT - Sakhalin Volcanic Eruption Response Team (Russia)

USAID - US Agency for International Development

USGS - United States Geological Survey

UTC - Coordinated Universal Time

VAAC - Volcanic Ash Advisory Center

VAFTAD - Volcanic Ash Forecast Transport And Dispersion

VDAP - Volcano Disaster Assistance Program (USGS)

VHP - Volcano Hazards Program (USGS)

VRC - Volcano Research Center (Japan)