All times are local unless otherwise stated.

Agung (Indonesia) | 27 December-2 January 2018 | New Eruptive Activity Cite this Report
Agung Sunda Volcanic Arc	PVMBG reported that during 27 December 2017-2 January 2018 gray-and-white plumes rose as high as 2 km above Agung’s crater rim and drifted W, SW, and E. Incandescence from the crater was often observed at night. Ash fell in several local villages including Badeg, Yeha, Temukus, Besakih (11 km WSW), and Muncan (12 km SW) on 1 January, and Rendang post on 2 January. The Alert Level remained at 4 (on a scale of 1-4), and the exclusion zones continued at a general 8-km radius and 10 km in the NNE, SE, S, and SW directions. Sources: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM), Badan Nacional Penanggulangan Bencana (BNPB)
Bezymianny (Russia) | 27 December-2 January 2018 | New Eruptive Activity Cite this Report
Bezymianny Eastern Kamchatka Volcanic Arc	On 29 December KVERT reported that activity at Bezymianny was characterized by moderate gas-and-steam emissions; a lava flow likely continued to effuse onto the N flank of the lava dome. A thermal anomaly over the volcano was identified in satellite images. The Aviation Color Code was lowered to Yellow. Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Kanlaon (Philippines) | 27 December-2 January 2018 | New Eruptive Activity Cite this Report
Kanlaon Negros-Sulu Volcanic Arc	PHIVOLCS reported that there were three or fewer volcanic earthquakes detected at Kanlaon each day during 27 December 2017-2 January 2018. Dense weather clouds prevented visual observations, though on 30 December a steam plume was seen rising 500 m above the crater rim and drifting SW. The Alert Level remained at 2 (on a scale of 0-5). Source: Philippine Institute of Volcanology and Seismology (PHIVOLCS)
Pacaya (Guatemala) | 27 December-2 January 2018 | New Eruptive Activity Cite this Report
Pacaya Central America Volcanic Arc	INSIVUMEH reported continuing Strombolian explosions at Pacaya’s Mackenney cone during 31 December 2017-1 January 2018. Source: Instituto Nacional de Sismologia, Vulcanologia, Meteorologia, e Hidrologia (INSIVUMEH)
Aira (Japan) | 27 December-2 January 2018 | Continuing Eruptive Activity Cite this Report
Aira Ryukyu Volcanic Arc	JMA reported that very small events occurred at Minamidake and Showa craters (at Aira Caldera’s Sakurajima volcano) during 25-28 December. An event at 0414 on 25 December ejected material from Minamidake Crater as far as 300 m from the crater. The Alert Level remained at 3 (on a 5-level scale). Source: Japan Meteorological Agency (JMA)
Cleveland (United States) | 27 December-2 January 2018 | Continuing Eruptive Activity Cite this Report
Cleveland Aleutian Ridge Volcanic Arc	AVO reported that on 27 and 31 December 2017 and 1 January 2018 elevated surface temperatures in Cleveland's summit crater were identified in satellite data; no other activity was noted using satellite data during 28 December 2017-2 January 2018, though weather clouds often hindered observations. Seismic and infrasound data were at background levels. The Aviation Color Code remained at Orange and the Volcano Alert Level remained at Watch. Source: US Geological Survey Alaska Volcano Observatory (AVO)
Dukono (Indonesia) | 27 December-2 January 2018 | Continuing Eruptive Activity Cite this Report
Dukono Halmahera Volcanic Arc	Based on analyses of satellite imagery, wind model data, and notices from PVMBG, the Darwin VAAC reported that during 26 December 2017-2 January 2018 ash plumes from Dukono rose to an altitude of 2.1 km (7,000 ft) a.s.l. and drifted in multiple directions. Source: Darwin Volcanic Ash Advisory Centre (VAAC)
Ebeko (Russia) | 27 December-2 January 2018 | Continuing Eruptive Activity Cite this Report
Ebeko Kuril Volcanic Arc	Based on observations by volcanologists in Severo-Kurilsk (Paramushir Island), about 7 km E of Ebeko, explosions on 25 December generated ash plumes that rose as high as 1.5 km (4,900 ft) a.s.l. The Aviation Color Code remained at Orange (the second highest level on a four-color scale). Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Kīlauea (United States) | 27 December-2 January 2018 | Continuing Eruptive Activity Cite this Report
Kīlauea Hawaiian-Emperor Hotspot Volcano Group	During 27 December 2017-2 January 2018 HVO reported that the lava lake continued to rise, fall, and spatter in Kīlauea's Overlook crater. Webcams recorded incandescence from long-active sources within Puʻu ʻŌʻō Crater and from a small lava pond in a pit on the W side of the crater. Surface lava flows were active above and on the pali, and on the coastal plain. Source: US Geological Survey Hawaiian Volcano Observatory (HVO)
Klyuchevskoy (Russia) | 27 December-2 January 2018 | Continuing Eruptive Activity Cite this Report
Klyuchevskoy Eastern Kamchatka Volcanic Arc	Based on satellite observations KVERT reported that gas-and-steam plumes from Klyuchevskoy contained some ash and drifted about 220 km E during 22-25 December. A weak thermal anomaly was visible on 22 December. The Aviation Color Code remained at Orange. Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Sheveluch (Russia) | 27 December-2 January 2018 | Continuing Eruptive Activity Cite this Report
Sheveluch Eastern Kamchatka Volcanic Arc	KVERT reported that a thermal anomaly over Sheveluch was identified in satellite images during 22-25 December. Explosions on 26 December generated ash plumes that rose as high as 8 km (26,200 ft) a.s.l. and drifted about 300 km NE. The Aviation Color Code remained at Orange. Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Sinabung (Indonesia) | 27 December-2 January 2018 | Continuing Eruptive Activity Cite this Report
Sinabung Sunda Volcanic Arc	PVMBG reported that during 27 December 2017-2 January 2018 events at Sinabung generated ash plumes that rose as high as 3.2 km above the crater rim, and avalanches of material that traveled as far as 1.5 km E, SE, and S. Pyroclastic flows descended the E, SSE, and S flanks during 27-29 December, traveling 4.6 km SSE and 3.5 km E and S. Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

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.

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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