All times are local unless otherwise stated.

Etna (Italy) | 27 November-3 December 2013 | New Eruptive Activity Cite this Report
Etna Sicily Volcanic Province	INGV reported on the 18th paroxysm occurred from Etna’s New Southeast Crater (NSEC) late in the afternoon on 28 November. Weather clouds prevented observations of the event. Vigorous Strombolian activity on 2 December produced a plume comprised mostly of gas drifting N. The activity intensified during the evening and evolved into a paroxysmal event that finished by 2330. The event was characterized by tall lava fountains, lava flows, and a plume laden with pyroclastic material that drifted NNW and deposited ash and lapilli in that area. The lava flows traveled SSE, SE, NE, and S. The next day sporadic explosions continued, inclement weather however prevented visual observations. Source: Sezione di Catania - Osservatorio Etneo (INGV)
Klyuchevskoy (Russia) | 27 November-3 December 2013 | New Eruptive Activity Cite this Report
Klyuchevskoy Eastern Kamchatka Volcanic Arc	KVERT reported that moderate seismic activity continued at Kliuchevskoi during 22-29 November. Video data showed Strombolian activity during that period. Satellite images recorded a daily thermal anomaly on the volcano; gas-and-steam plumes containing small amounts of ash were visible drifting 90 km SE on 25 November. On 3 December KVERT noted that since 19 November ash-plume altitudes had been decreasing. The Aviation Color Code was lowered to Yellow. Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Nishinoshima (Japan) | 27 November-3 December 2013 | New Eruptive Activity Cite this Report
Nishinoshima Ogasawara Volcanic Arc	The Japan Coast Guard reported that the eruption at Nishimo-shima, that generated a new island called Niijima continued on 1 December. The crater remained very hot and lava flows continued to expand. Source: Japan Coast Guard
Sheveluch (Russia) | 27 November-3 December 2013 | New Eruptive Activity Cite this Report
Sheveluch Eastern Kamchatka Volcanic Arc	Based on visual observations and analyses of satellite data, KVERT reported that during 22-29 November a new lava dome extruded onto the NW part of Shiveluch's older lava dome. Moderate ash explosions generated ash plumes that rose to altitudes of 4-5 km (13,100-16,400) a.s.l. Lava-dome extrusion was accompanied by hot avalanches, incandescence, and fumarolic activity. A thermal anomaly was detected daily in satellite images. On 3 December activity increased and hot avalanches occurred continuously. Video data showed ash plumes rising to altitudes of 4-5 km (13,100-16,400) a.s.l. and drifting 20 km NW. A strong explosive event began at 1325 and generated ash plumes that rose to altitudes of 8-9 km (26,200-29,500 ft) a.s.l. and drifted NW. Pyroclastic flows descended the SW and NW flanks. The Aviation Color Code was raised to Red. Later that day KVERT noted that the strong explosive phase had ended; the Aviation Color Code was lowered back to Orange. An ash plume observed in satellite images was 200 km long and extended N. Ashfall was reported in Ivashka Village. Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Sinabung (Indonesia) | 27 November-3 December 2013 | New Eruptive Activity Cite this Report
Sinabung Sunda Volcanic Arc	Based on webcam data and wind data, the Darwin VAAC reported that during 28-31 November and 2 December ash plumes from Sinabung rose to altitudes of 3-5.5 km (10,000-18,000 ft) a.s.l. Ash plumes drifted 150 km W during 30-31 November and 55 km Won 2 December. On 3 December ash plumes rose to an altitude of 8.2 km (27,000 ft) a.s.l. and drifted W. According to a news report on 2 December, landslides killed nine people in the Gundaling village, 12 km E. Sources: Darwin Volcanic Ash Advisory Centre (VAAC), Associated Press
Aira (Japan) | 27 November-3 December 2013 | Continuing Eruptive Activity Cite this Report
Aira Ryukyu Volcanic Arc	JMA reported that three explosions from Sakura-jima's Showa Crater ejected tephra as far as 800 m during 29 November-2 December. On 29 November an explosion ejected tephra, up to 1 cm in diameter, 4 km away. The Alert Level remained at 3 (on a scale of 1-5).The Tokyo VAAC reported that during 29-30 November, and 1 and 4 December, explosions generated plumes that rose to altitudes of 2.1-2.7 km (7,000-9,000 ft) a.s.l. and drifted E and SE. Sources: Japan Meteorological Agency (JMA), Tokyo Volcanic Ash Advisory Center (VAAC)
Chirinkotan (Russia) | 27 November-3 December 2013 | Continuing Eruptive Activity Cite this Report
Chirinkotan Kuril Volcanic Arc	SVERT reported that steam-and-gas emissions from Chirinkotan drifted more than 50 km on 25 November. The Aviation Color Code remained at Yellow. Source: Sakhalin Volcanic Eruption Response Team (SVERT)
Chirpoi (Russia) | 27 November-3 December 2013 | Continuing Eruptive Activity Cite this Report
Chirpoi Kuril Volcanic Arc	SVERT reported that steam-and-gas emissions from Snow, a volcano of Chirpoi, were detected in satellite images drifting 90 km SE on 25 November. A thermal anomaly was detected during 27-28 November. The Aviation Color Code remained at Yellow. Source: Sakhalin Volcanic Eruption Response Team (SVERT)
Karymsky (Russia) | 27 November-3 December 2013 | Continuing Eruptive Activity Cite this Report
Karymsky Eastern Kamchatka Volcanic Arc	KVERT reported that moderate seismic activity at Karymsky was detected during 22-29 November. Satellite images detected a bright thermal anomaly on the volcano during 25-26 November, possibly indicating Vulcanian and Strombolian activity. The Aviation Color Code remained at Orange. Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Kīlauea (United States) | 27 November-3 December 2013 | Continuing Eruptive Activity Cite this Report
Kīlauea Hawaiian-Emperor Hotspot Volcano Group	During 27 November-3 December HVO reported that the circulating lava lake occasionally rose and fell in the deep pit within Kīlauea's Halemaʻumaʻu Crater. The plume from the vent continued to deposit variable amounts of ash, spatter, and Pele's hair onto nearby areas. At Puʻu ʻŌʻō Crater, glow emanated from spatter cones on the N and S portions of the crater floor. The 7.3-km-long Kahauale’a 2 lava flow, fed by the NE spatter cone, was active with scattered break-out flows and burned the forest N of Puʻu ʻŌʻō; the flow however was most active between 3.3 and 5.8 km NE of Puʻu ʻŌʻō based on a satellite images from 30 November. Source: US Geological Survey Hawaiian Volcano Observatory (HVO)
Manam (Papua New Guinea) | 27 November-3 December 2013 | Continuing Eruptive Activity Cite this Report
Manam Bismarck Volcanic Arc	RVO reported that activity at both Manam's Southern Crater and Main Crater was low during 16-30 November; white vapor emissions rose from both craters. Incandescence from Southern Crater was visible on 28 and 30 November, and on 30 November diffuse gray ash plumes rose from the crater. Source: Rabaul Volcano Observatory (RVO)
Pacaya (Guatemala) | 27 November-3 December 2013 | Continuing Eruptive Activity Cite this Report
Pacaya Central America Volcanic Arc	On 28 November INSIVUMEH reported that activity at Pacaya remained unchanged; weak explosions, gas emissions, and the ejection of tephra continued. Pilots reported that ash plumes rose 2.5-2.7 km and drifted 10 km SW. Source: Instituto Nacional de Sismologia, Vulcanologia, Meteorologia, e Hidrologia (INSIVUMEH)
Rabaul (Papua New Guinea) | 27 November-3 December 2013 | Continuing Eruptive Activity Cite this Report
Rabaul Bismarck Volcanic Arc	RVO reported that Rabaul caldera's Tavurvur cone was generally quiet during 16-30 November. A few explosions during 15-18 November generated ash plumes that rose to low altitudes (no more than 1 km) and drifted E, SE, and NW. Small amounts of fine-grained ash fell around Rabaul town (3-5 km NW). White-to-light-gray emissions rose from the crater the remainder of the month. Source: Rabaul Volcano Observatory (RVO)
Suwanosejima (Japan) | 27 November-3 December 2013 | Continuing Eruptive Activity Cite this Report
Suwanosejima Ryukyu Volcanic Arc	Based on information from JMA, the Tokyo VAAC reported that an explosion from Suwanose-jima on 27 November generated a plume that rose to an altitude of 1.8 km (6,000 ft) a.s.l. and drifted E. Source: Tokyo Volcanic Ash Advisory Center (VAAC)
Ulawun (Papua New Guinea) | 27 November-3 December 2013 | Continuing Eruptive Activity Cite this Report
Ulawun Bismarck Volcanic Arc	RVO reported that activity at Ulawun was low during 16-30 November. Small volumes of gray to gray-brown ash plumes rose 100 m from the crater on most days and drifted S. On 21 November ashfall was reported in Navo on the SW flank. Source: Rabaul Volcano Observatory (RVO)

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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