All times are local unless otherwise stated.

Cleveland | 7 March-13 March 2001 | New Activity / Unrest Cite this Report
Cleveland Chuginadak Island (USA)	The AVO reported that an explosive eruption at Cleveland began at 0500 on 11 March. The resultant ash cloud was visible on satellite imagery from the onset of the eruption and after it ended 3 hours later. Wind-data analysis suggested that the ash cloud reached a height of 6-7.6 km a.s.l. By 1400 the main part of the ash cloud was detached from the volcano and drifting to the E. Satellite imagery from 2030 showed that the ash cloud was located in two main regions; one region was centered ~80 km S of Dutch Harbor and was ~80 km in diameter, and the other was centered ~160 km SE of Dutch Harbor and extended ~160 km E to W and ~65 km N to S. Both areas of ash were visible on satellite imagery through 1315 on 12 March. In addition, a thermal anomaly on the volcano, which was first detected shortly after the eruption began, persisted. AVO interpreted the thermal anomaly to indicate that unrest was continuing at Cleveland and that further explosive activity could occur at anytime. By 0930 on 13 March the ash cloud was no longer visible on satellite imagery. Sources: Anchorage Volcanic Ash Advisory Center (VAAC), Tokyo Volcanic Ash Advisory Center (VAAC), US Geological Survey Alaska Volcano Observatory (AVO)
Mayon | 7 March-13 March 2001 | New Activity / Unrest Cite this Report
Mayon Luzon (Philippines)	PHIVOLCS reported that during 7 to 13 March, 6-33 low-frequency earthquakes were recorded daily. One SO2 emission measurement was made during the week on 4 March, with a reading of 1,750 metric tons. Like the previous weeks, a slight inflationary trend was detected at the volcano's edifice and weak-to-moderate steaming was occasionally seen. At 1509 on 11 March a brief ash discharge reached a height of 150 m and drifted to the SW. At 1940 the same day faint incandescence was observed at the crater using a telescope; graded as level 1 intensity. Mayon remained at Alert Level 3 (on a scale of 0-5). Source: Philippine Institute of Volcanology and Seismology (PHIVOLCS)
Nyamulagira | 7 March-13 March 2001 | New Activity / Unrest Cite this Report
Nyamulagira DR Congo	The eruption at Nyamuragira that began on 5 February continued, with lava flows mainly travelling down the S flank of the volcano. The UN Integrated Regional Information Network reported on 27 February that a UN-government assessment team that visited the town of Goma, ~40 km S of the volcano, determined that ash and lava from the eruption had damaged agriculture and livestock. The team warned that there was an urgent need for food, medicine, and vegetable seeds in the affected areas of Goma, Kitshanga, and Kalungu. According to the Goma Volcanological Observatory, a new eruption began on 2 March with eruptive activity concentrated mainly on the S flank. The Observatory stated that wind had blown ash towards the W and ash fall had destroyed ~50 km2 of pasture and 150 km2 of crops up to 30 km from the volcano in the towns of Rusaya, Kirolirwe, Burungu, Minova, the Masisi territory, and the S part of Kichanga. Ash and gas from the eruption have caused many people in those areas and Goma to experience fever, diarrhea, headache, conjunctivitis, and respiratory problems. Sources: Observatoire Volcanologique de Goma (OVG), IRIN News, Reuters
Nyiragongo | 7 March-13 March 2001 | New Activity / Unrest Cite this Report
Nyiragongo DR Congo	The Goma Volcanological Observatory reported that there may be renewed volcanic activity at Nyiragongo volcano, ~10 km SE of Nyamuragira volcano. The observatory stated that during the current eruption of Nyamuragira the temperature increased in Nyiragongo's main cone and Shaheru fissure, ~3 km S of the summit. In addition, new fumaroles were observed inside Nyiragongo's main crater and along the fissure connecting the main crater and Shaheru cone. Cracks that were observed in the crater of the main cone suggested that dilatation of the crater had occurred. Source: Observatoire Volcanologique de Goma (OVG)

Etna | 7 March-13 March 2001 | Continuing ActivityCite this Report
Etna Sicily (Italy)	According to the Italy's Volcanoes website, during the first half of March mild, but occasionally vigorous eruptive activity continued at Etna's summit craters much like it has since mid January. Near-continuous Strombolian activity continued at two vents in Bocca Nuova Crater and Strombolian activity intermittently occurred within the central pit of the Northeast Crater. Short lobes of lava continued to form after slowly emerging from a vent on the NNE flank of the Southeast Crater cone. Source: Italy's Volcanoes
Kilauea | 7 March-13 March 2001 | Continuing ActivityCite this Report
Kilauea Hawaiian Islands (USA)	Lava slowly flowed SE down the Pulama pali and across the coastal plain in a broad flow front, ~1.5 km wide. Much of the flow front was within 1-1.3 km of the coastline, with the closest point ~700 m from the coast. 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)
Klyuchevskoy | 7 March-13 March 2001 | Continuing ActivityCite this Report
Klyuchevskoy Central Kamchatka (Russia)	The KVERT reported that during 2-8 March seismicity was at background levels, with weak spasmodic tremor occasionally registered. On 4 March a gas-and-steam plume rose 600-1,000 m above the volcano and extended more than 10 km to the NE. As reported by the Tokyo VAAC, GMS-5 imagery showed that the plume rose to a height of ~9.5 km a.s.l. The Concern Color Code remained at Green. Sources: Kamchatkan Volcanic Eruption Response Team (KVERT), Tokyo Volcanic Ash Advisory Center (VAAC)
Lokon-Empung | 7 March-13 March 2001 | Continuing ActivityCite this Report
Lokon-Empung Sulawesi	The VSI reported that visual observations made during 27 February to 5 March revealed that activity decreased at Lokon-Empung. Only small-to-medium sized steam plumes were observed rising 50-150 m above the crater. The Alert level was reduced from 3 to 2 (on a scale of 1-4). Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)
Merapi | 7 March-13 March 2001 | Continuing ActivityCite this Report
Merapi Central Java	Visual and instrumental monitoring conducted by VSI personnel revealed that volcanic activity at Merapi had decreased; therefore on 7 March the Alert Level was reduced from 3 to 2 (on a scale of 1-4). During 27 February- 5 March, volcanic activity was dominated by an average of 100 lava avalanches per day. The avalanche material traveled to the SW, entering the Sat and Senowo rivers with runout distances of 2.3-2.5 km. On 6 March a pyroclastic flow deposited material up to 1.5 km down the Sat River. Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)
Popocatepetl | 7 March-13 March 2001 | Continuing ActivityCite this Report
Popocatepetl Mexico	CENAPRED reported that Popocatépetl's activity was at low-to-moderate levels during most of the week, with small exhalations accompanied by steam emissions. Based on reports from the Mexico MWO, the Washington VAAC reported that at 2024 on 12 March an ash cloud from an exhalation of Popocatépetl was observed at a height of ~ 7 km a.s.l. The ash cloud was not visible on GOES-8 imagery. The volcano remained at Alert Level Yellow Phase III, with a restricted area of 12-km-radius. Sources: Washington Volcanic Ash Advisory Center (VAAC), Centro Nacional de Prevencion de Desastres (CENAPRED)
Sheveluch | 7 March-13 March 2001 | Continuing ActivityCite this Report
Sheveluch Central Kamchatka (Russia)	The KVERT reported that during 2-6 March, several series of shallow earthquakes were registered, with some followed by weak spasmodic volcanic tremor. The bursts of activity may have corresponded to weak ash-and-gas explosions that rose to heights of 2-3 km above the crater. During 3-4 March, visual and satellite-based data revealed that a gas-and-ash plume rose 300-800 m above the crater and drifted more than 50 km to the E. At 1545 on 7 March seismic data indicated the probable occurrence of a short-lived gas-and-ash explosion, accompanied by a series of shallow and high-frequency earthquakes for ~15 minutes. Observers in Klyuchi town reported that at 1600 the same day the ash-and-gas plume rose 1.5 km above the lava dome and extended to the NW. According to a pilot report, at 1620 the ash plume was visible at a height of 10 km above the volcano drifting towards the NE. The AVO reported that satellite imagery at 1715 showed two plumes: one was at a low altitude, composed mostly of steam, and drifted to the E; the other was located 7-8 km a.s.l., composed mostly of ash, and drifted to the N. At 1625 the Tokyo VAAC detected the ash cloud on GMS-5 imagery at a height of ~10 km a.s.l. The ash cloud was no longer visible on satellite imagery by 0342 on 8 March. The Concern Color Code remained at Yellow. Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Soufriere Hills | 7 March-13 March 2001 | Continuing ActivityCite this Report
Soufriere Hills Montserrat	The MVO reported that during 2-9 March activity decreased at Soufrière Hills volcano in comparison to the previous week, with the lava dome returning to a steady growth rate. Early in the report week the banded tremor recorded the previous week died away, as did the associated hybrid earthquakes. Rockfall activity increased during the middle of the week, returning to more usual levels. The volcano appeared to have resumed steady dome growth by the end of the week. Observations confirmed that the main area of lava-dome growth had switched to the S of the dome on 25 February, which led to a concentration of rockfall activity in the upper portions of the White River Valley. Light ashfall from activity during the week was blown over the N of the island, although by the end of the week the wind switched back to the more usual direction towards the W. 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 19,996 individual reports over 1,215 weeks (average of 16 per week) on 332 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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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)