All times are local unless otherwise stated.

Etna (Italy) | 18 December-24 December 2002 | Continuing Eruptive Activity Cite this Report
Etna Sicily Volcanic Province	Eruptive activity continued during 16-21 December at Etna. According to the Italy's Volcanoes website, during the evening of 16-17 December explosive activity changed from lava-and-ash fountaining to discrete, ash-poor Strombolian explosions. Lava continued to flow from two vents at the S base of the active pyroclastic cone at 2,750-m elevation. During 19-21 December there were frequent shifts from lava fountaining and ash emissions to Strombolian explosions, and vice versa. Lava was no longer traveling towards the Rifugio Sapienza tourist complex. Ash had not fallen at the Catania airport since 8 December, so the airport returned to full service. Sources: Etna Volcan Sicilien (Charles Rivière), Italy's Volcanoes, Toulouse Volcanic Ash Advisory Centre (VAAC)
Karymsky (Russia) | 18 December-24 December 2002 | Continuing Eruptive Activity Cite this Report
Karymsky Eastern Kamchatka Volcanic Arc	Seismicity remained above background levels at Karymsky during 13-20 December, with about 190-210 shallow events recorded per day. The character of seismicity indicated that ash-and-gas explosions reached heights of ~1 km above the volcano, and vigorous, 5- to 10-minute-long gas emissions possibly occurred. Karymsky remained at Concern Color Code Yellow. Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Kīlauea (United States) | 18 December-24 December 2002 | Continuing Eruptive Activity Cite this Report
Kīlauea Hawaiian-Emperor Hotspot Volcano Group	During 18-22 December, lava continued to enter the sea at several points along the coast at three lava deltas. Surface lava flows were visible along the E arm that feeds a new lava delta, and sporadically along Paliuli. Generally, seismicity was at normal levels. The swarm of long-period earthquakes and tremor beneath Kīlauea's caldera, occasionally seismically active since June, continued at a relatively low level. No significant deformation was recorded. Source: US Geological Survey Hawaiian Volcano Observatory (HVO)
Klyuchevskoy (Russia) | 18 December-24 December 2002 | Continuing Eruptive Activity Cite this Report
Klyuchevskoy Eastern Kamchatka Volcanic Arc	Seismicity was above background levels at Kliuchevskoi during 13-20 December. Seismographs recorded 6-12 earthquakes per day during the report period at depths of ~ 30 km. In addition, intermittent spasmodic volcanic tremor was recorded. Gas-and-steam plumes rose ~1.5 km above the crater and extended E and SE. Kliuchevskoi remained at Concern Color Code Yellow. Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Piton de la Fournaise (France) | 18 December-24 December 2002 | Continuing Eruptive Activity Cite this Report
Piton de la Fournaise Reunion Hotspot Volcano Group	OVPDLF reported on 19 December that after effusive activity stopped on 3 December very strong seismicity was recorded with more than 1,000 earthquakes occurring per day. The earthquakes were located a few hundred meters below Dolomieu crater. OVPDLF stated that crater collapse is possible. Source: Observatoire Volcanologique du Piton de la Fournaise (OVPF)
Popocatépetl (Mexico) | 18 December-24 December 2002 | Continuing Eruptive Activity Cite this Report
Popocatépetl Trans-Mexican Volcanic Arc	Moderate explosions occurred at Popocatépetl on 18 December. After a period of high-frequency tremor, an explosion occurred at 0148 that produced an ash cloud that reached 2 km above the crater. Later, at 0209 and 0214 two explosions sent ash to ~0.5 km above the crater. that drifted to the NE. Fragments were sent around the crater a distance of ~1.5 km. The volcano returned to its previous relatively low level of activity. Popocatépetl remained at Alert Level Yellow phase II. Sources: Centro Nacional de Prevencion de Desastres (CENAPRED), EFE News Service, Washington Volcanic Ash Advisory Center (VAAC)
Rabaul (Papua New Guinea) | 18 December-24 December 2002 | Continuing Eruptive Activity Cite this Report
Rabaul Bismarck Volcanic Arc	During 17-20 December, the eruption of Rabaul volcano's Tavurvur cone was characterized by slow, convoluted ash plumes that rose several hundred to more than a thousand meters above the summit. Seismicity was low to moderate and no significant ground deformation was recorded. Source: Rabaul Volcano Observatory (RVO) via the Darwin Volcanic Ash Advisory Center
Reventador (Ecuador) | 18 December-24 December 2002 | Continuing Eruptive Activity Cite this Report
Reventador Northern Andean Volcanic Arc	During 18-23 December, volcanic and seismic activity were low at Reventador. Seismicity was characterized by low-frequency tremor. No new activity was recorded at the volcano. Sources: Washington Volcanic Ash Advisory Center (VAAC), Instituto Geofísico-Escuela Politécnica Nacional (IG-EPN)
Sheveluch (Russia) | 18 December-24 December 2002 | Continuing Eruptive Activity Cite this Report
Sheveluch Eastern Kamchatka Volcanic Arc	During 13-20 December, seismicity remained above background levels at Shiveluch. Seismic data indicated that seven ash-and-gas explosions reached heights of 1-2 km above the lava dome, and hot avalanches possibly occurred. A number of smaller earthquakes at depths of 0-6 km and weak intermittent spasmodic tremor was recorded. On 19 December around 0045 a pyroclastic flow traveled ~3 km down Shiveluch's SE slope. The associated plume rose 5.5 km a.sl. 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) | 18 December-24 December 2002 | Continuing Eruptive Activity Cite this Report
Soufrière Hills Lesser Antilles Volcanic Arc	Volcanic activity at Soufrière Hills increased to a high level during 13-20 December. Activity generally remained at moderate levels during the first half of the report period, but increased to a high level over the last 3 days. Spectacular incandescence of the dome was observed on most nights. The active extruded lobe on the dome's N side continued to grow, producing numerous rockfalls and small-to-moderate pyroclastic flows. Most of the activity was concentrated on the NNE and N flanks, producing numerous pyroclastic flows in White's Ghaut, the Tar River Valley and Tuitt's Ghaut. Pyroclastic flows and rockfalls also traveled down the W and NW flanks. On 19 December mudflows occurred in White River, Tar River Valley and Fort Ghaut. Sources: Montserrat Volcano Observatory (MVO), Washington Volcanic Ash Advisory Center (VAAC)
Tungurahua (Ecuador) | 18 December-24 December 2002 | Continuing Eruptive Activity Cite this Report
Tungurahua Northern Andean Volcanic Arc	During 18-22 December, emissions of steam, gas, and ash continued at Tungurahua. Plumes rose to ~1 km above the volcano. Sources: Washington Volcanic Ash Advisory Center (VAAC), Instituto Geofísico-Escuela Politécnica Nacional (IG-EPN)

Since the Weekly Volcanic Activity Report began in November 2000, there have been 22,882 individual reports over 1,336 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.

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