All times are local unless otherwise stated.

Lokon-Empung (Indonesia) | 12 February-18 February 2003 | New Eruptive Activity Cite this Report
Lokon-Empung Sangihe Volcanic Arc	On 10 February at 2219 an ash explosion occurred at Lokon-Empung, but the height of the resultant ash cloud could not be determined due to heavy rain. On 12 February, mainly during 0100-1000, there was a significant increase in volcanic earthquakes. At 1048 an explosion occurred, followed by seismic data indicating a larger explosion at 1102. On 12 February during 0800-1100 the Alert Level was raised from 3 to 4 (the highest level). Tremor was continuously recorded during 1255 on the 12th to 0046 the following day. According to the Darwin VAAC, an explosion occurred on 19 February at 0403 that produced a plume to 500 m above the summit. Sources: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM), Darwin Volcanic Ash Advisory Centre (VAAC)
Nyiragongo (DR Congo) | 12 February-18 February 2003 | New Eruptive Activity Cite this Report
Nyiragongo Albertine Rift Volcanic Province	Beginning around 10 February volcanic activity increased at Nyiragongo. Fine ash covered cars in the city of Goma and at 1142 a long-period earthquake occurred for more than 2 minutes that was followed by several small events and an increase in tremor amplitude. Residents near the volcano noticed an increase in plume height, a change in plume color from white to black, and a sustained rain of ash and Pele's hair. As of the 14th, Pele's hair continued to fall in Goma and an ash plume was visible rising at least 5 km above the crater. At this time seismicity was probably lower than the previous week. GVO stated that the Pele's hair that fell in Goma was produced by lava fountaining inside Nyiragongo's crater. Residents in Goma and surrounding villages experienced a water shortage due to the contamination of rain water, which is their only source of water. According to the MODIS Thermal Alerts website, thermal alerts have been visible at Nyiragongo every month since June 2002. Two alert pixels were visible at the volcano on 13 February. Sources: Observatoire Volcanologique de Goma (OVG), The Open University Volcano Dynamics Group
Etna (Italy) | 12 February-18 February 2003 | Continuing Eruptive Activity Cite this Report
Etna Sicily Volcanic Province	According to the Italy's Volcanoes website, on 12 February a series of ten earthquakes occurred on Etna's NE flank in the same area that was affected by vigorous seismicity and ground deformation before and during the initial phase of the 27 October 2002 to 28 January 2003 eruption. The largest earthquake occurred on 13 February at 0632, with a magnitude of 3.8 and a focal depth of 1.65 km. Source: Italy's Volcanoes
Kīlauea (United States) | 12 February-18 February 2003 | Continuing Eruptive Activity Cite this Report
Kīlauea Hawaiian-Emperor Hotspot Volcano Group	During 12-19 February at Kīlauea, lava continued to flow into the sea at the West Highcastle entry. Lava flowed through lava tubes down Pūlama pali and Paliuli as it traveled to the sea. Surface lava flows continued to travel through vegetation, igniting fires and causing methane explosions. Rangers' office huts, restrooms, and signs were moved out of the path of the lava flow, which reached the Chain of Craters Road on 19 February at 1005. Generally, seismicity remained at normal levels, with the long-lasting swarm of long-period earthquakes and tremor at Kīlauea's summit, which began last June, continuing at low-to-moderate levels. Small periods of inflation and deformation, which were consistent in magnitude and patterns, were recorded at Uwekahuna and Puʻu ʻŌʻō tiltmeters during the report period. Sources: Honolulu Advertiser, US Geological Survey Hawaiian Volcano Observatory (HVO)
Klyuchevskoy (Russia) | 12 February-18 February 2003 | Continuing Eruptive Activity Cite this Report
Klyuchevskoy Eastern Kamchatka Volcanic Arc	Seismicity was slightly above background levels during 7-14 February at Kliuchevskoi, with 17-30 earthquakes occurring each day at depths of ~30 km. Continuous spasmodic volcanic tremor was registered during the report week, and gas-and-steam plumes rose to 1.5 km above the crater. The Concern Color Code remained at Yellow. Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Popocatépetl (Mexico) | 12 February-18 February 2003 | Continuing Eruptive Activity Cite this Report
Popocatépetl Trans-Mexican Volcanic Arc	A moderate explosion at Popocatépetl on 14 February at 0534 ejected incandescent fragments as far away as 3 km around the crater. Also, a dense ash column rose 5 km above the volcano and drifted NE. The ejected fragments caused some fires in pasture land. This eruption was related to the partial destruction of the lava dome. After the eruption, activity returned to low-to-moderate emissions of steam, gas, and ash. Sources: Centro Nacional de Prevencion de Desastres (CENAPRED), Washington Volcanic Ash Advisory Center (VAAC)
Santa María (Guatemala) | 12 February-18 February 2003 | Continuing Eruptive Activity Cite this Report
Santa María Central America Volcanic Arc	Based on information from INSIVUMEH, the Washington VAAC reported that explosions occurred at Santa María during the evening of 16 February and the following morning. The explosions from Santiaguito lava dome produced ash plumes that rose to 600 m above the summit. An ash plume was visible on satellite imagery. Source: Washington Volcanic Ash Advisory Center (VAAC)
Sheveluch (Russia) | 12 February-18 February 2003 | Continuing Eruptive Activity Cite this Report
Sheveluch Eastern Kamchatka Volcanic Arc	During 7-14 February, seismicity remained above background levels at Shiveluch and many shallow earthquakes were recorded. Seismic data indicated that 10 ash-and-gas explosions reached heights of 1 km above the lava dome, and hot avalanches possibly occurred. Volcanic spasmodic tremor occurred and gas-and-steam plumes rose to 1 km above the crater. Thermal anomalies were visible on satellite imagery. Shiveluch remained at Concern Color Code Yellow. Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Soufrière Hills (United Kingdom) | 12 February-18 February 2003 | Continuing Eruptive Activity Cite this Report
Soufrière Hills Lesser Antilles Volcanic Arc	Activity at Soufrière Hills was at moderate levels during 7-14 February. Lava-dome growth was focused towards the NNE and produced pyroclastic flows and rockfalls in Tuitt's Ghaut, White's Ghaut, and along the N side of the Tar River Valley. Rockfalls and small pyroclastic flows also occurred off the N flank of the dome onto the area of Riley's Estate. The Washington VAAC stated that several low-level ash plumes were visible on satellite imagery. Sources: Washington Volcanic Ash Advisory Center (VAAC), Montserrat Volcano Observatory (MVO)
Tungurahua (Ecuador) | 12 February-18 February 2003 | Continuing Eruptive Activity Cite this Report
Tungurahua Northern Andean Volcanic Arc	Seismic and volcanic activity remained at low-to-moderate levels at Tungurahua during 7-14 February, with emissions of steam, gas, and ash producing low-level plumes. Based on information from IG, the Washington VAAC reported that an emission occurred on 12 February at 1657 that rose to low levels and drifted W. No ash was visible on satellite imagery. Sources: Washington Volcanic Ash Advisory Center (VAAC), Instituto Geofísico-Escuela Politécnica Nacional (IG-EPN)
Veniaminof (United States) | 12 February-18 February 2003 | Continuing Eruptive Activity Cite this Report
Veniaminof Aleutian Ridge Volcanic Arc	The elevated seismicity that began at Veniaminof in mid-December 2002 continued through 7-14 February. Discrete seismic events occurred at rates up to 1 event per minute. AVO stated that at this level of seismic unrest, low-level steaming, and minor ash emissions may occur at any time. No elevated surface temperatures, ash emissions, or ash deposits were noted on satellite images. The Concern Color Code remained at Yellow. Source: US Geological Survey Alaska Volcano Observatory (AVO)

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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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.

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