All times are local unless otherwise stated.

Fuego (Guatemala) | 25 November-1 December 2015 | New Eruptive Activity Cite this Report
Fuego Central America Volcanic Arc	INSIVUMEH reported that on 29 November activity at Fuego increased significantly, characterized by large and strong explosions, ash plumes, and lava flows. Ash plumes rose as high as 2.2 km above the crater and drifted 40 km W and SW. Lava fountains rose 500 m above the crater, feeding four lava flows that traveled 3-4 km down the Ceniza, Trinidad, Las Lajas, and Santa Teresa drainages. Ash fell in Panimache I and II (8 km SW), Morelia (9 km SW), Santa Sofía (12 km SW), El Porvenir (8 km ENE), Yucales (12 km SW), Rochelle, Ceylon, and other neighboring communities. Activity declined on 30 November; lava fountains rose 100-150 m, and ash plumes rose 1 km and drifted 25 km WSW. Lava flows were active in five drainages, including the Honda drainage (E flank). On 1 December weak-to-moderate explosions generated ash plumes that rose 400-800 m and drifted 10-12 km W and SW. Lava fountains continued to rise as high as 150 m. The five lava flows were at most 3 km long, and small pyroclastic flows descended the Honda drainage. Source: Instituto Nacional de Sismologia, Vulcanologia, Meteorologia, e Hidrologia (INSIVUMEH)
Kanlaon (Philippines) | 25 November-1 December 2015 | New Eruptive Activity Cite this Report
Kanlaon Negros-Sulu Volcanic Arc	PHIVOLCS reported that the seismic network for Kanlaon detected 11 volcanic earthquakes during 24-25 November. Emissions of gas and ash rose 150 m above the crater and drifted SW on 25 November. The Alert Level remained at 1 (on a scale of 0-5). Source: Philippine Institute of Volcanology and Seismology (PHIVOLCS)
Momotombo (Nicaragua) | 25 November-1 December 2015 | New Eruptive Activity Cite this Report
Momotombo Central America Volcanic Arc	INETER reported that at 0749 on 1 December an explosion at Momotombo generated a gas-and-ash plume that rose 1 km above the crater and drifted SW. Explosions at 0817, 0842, and 0855 generated ash plumes that rose 300 m. Gas emissions were visible the rest of the day. SINAPRED reported that during 1-2 December explosions ejected incandescent tephra and a slow-moving lava flow on the N flank was observed. Ashfall was reported in nearby communities to the W and SW, including La Concha, Los Arcos, Flor de la Piedra, La Paz Centro, and Leóin. Some families in La Paz Centro self-evacuated. Sources: Instituto Nicaragüense de Estudios Territoriales (INETER), La Prensa (Nicaragua), Sistema Nacional para la Prevención, Mitigación y Atención de Desastres (SINAPRED)
Telica (Nicaragua) | 25 November-1 December 2015 | New Eruptive Activity Cite this Report
Telica Central America Volcanic Arc	INETER reported that four 5-minute-long explosions at Telica were detected at 0602, 0818, 0934, and 1124 on 25 November, and generated ash-and-ash emissions. On 26 November multiple gas-and-ash explosions were detected; the strongest explosion occurred at 0941 and produced an ash plume that rose more than 800 m above the crater. During 26-27 November a total of 29 explosions were detected, with 16 of those producing ash plumes. Source: Instituto Nicaragüense de Estudios Territoriales (INETER)
Zhupanovsky (Russia) | 25 November-1 December 2015 | New Eruptive Activity Cite this Report
Zhupanovsky Eastern Kamchatka Volcanic Arc	Based on satellite images, KVERT reported that on 28 November ash plumes from Zhupanovsky rose to altitudes of 5-6 km (16,400-19,700 ft) a.s.l. and drifted 285 km E. The Aviation Color Code was raised to Orange. IVS FED RAS (Institute Volcanology and Seismology Far East Division of the Russian Academy of Sciences) observers noted an ash explosion at 0356 on 1 December; the Tokyo VAAC reported that the resulting ash plume rose to an altitude of 9 km (29,500 ft) a.s.l. and drifted 60 km SE. Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Colima (Mexico) | 25 November-1 December 2015 | Continuing Eruptive Activity Cite this Report
Colima Trans-Mexican Volcanic Arc	Based on satellite images, wind data, webcam images, and notices from the Mexico City MWO, the Washington VAAC reported that during 24 November-1 December ash plumes from Colima rose to altitudes of 5.2-6.6 km (17,000-22,000 ft) a.s.l. and drifted multiple directions. Source: Washington Volcanic Ash Advisory Center (VAAC)
Copahue (Chile-Argentina) | 25 November-1 December 2015 | Continuing Eruptive Activity Cite this Report
Copahue Southern Andean Volcanic Arc	SERNAGEOMIN reported that during 16-30 November continuous ash emissions from explosions at Copahue's El Agrio crater were recorded by the webcam; plumes rose as high as 1.3 km above the crater on 29 November. Satellite images detected ash plumes drifting as far as 560 km SE and ESE. During an overflight on 28 November scientists observed the absence of the acidic lake and a growing pyroclastic cone. Impact craters from ballistics ejected during minor explosions were within a radius of 300 m of El Agrio. Satellite images detected a thermal anomaly during 28-29 November. The Alert Level remained at Yellow; SERNAGEOMIN recommended no entry into a restricted area within 1.5 km of the crater. ONEMI maintained Level Yellow for the community of Alto Biobío (40 km W) in the Biobío region (since 3 June 2013). Source: Servicio Nacional de Geología y Minería (SERNAGEOMIN)
Cotopaxi (Ecuador) | 25 November-1 December 2015 | Continuing Eruptive Activity Cite this Report
Cotopaxi Northern Andean Volcanic Arc	IG reported that during 25 November-1 December seismic activity at Cotopaxi was characterized by volcano-tectonic, hybrid, and long-period events. Seismic signals indicating emissions and explosions were also detected. Although cloud cover often prevented observations, gas-and-steam emissions were visible daily. The plumes contained ash on most days and rose as high as 1 km, drifting W and SW. Lahar descended the Agualongo river during 28-29 November and the Mariscal Sucre river on 29 November. Source: Instituto Geofísico-Escuela Politécnica Nacional (IG-EPN)
Dukono (Indonesia) | 25 November-1 December 2015 | Continuing Eruptive Activity Cite this Report
Dukono Halmahera Volcanic Arc	Based on analyses of satellite imagery and wind data, the Darwin VAAC reported that during 25 November-1 December ash plumes from Dukono rose to altitudes of 2.1-2.4 km (7,000-8,000 ft) a.s.l. and drifted 35-165 km in multiple directions. Source: Darwin Volcanic Ash Advisory Centre (VAAC)
Karymsky (Russia) | 25 November-1 December 2015 | Continuing Eruptive Activity Cite this Report
Karymsky Eastern Kamchatka Volcanic Arc	KVERT reported that moderate explosive activity at Karymsky continued during 20-27 November. Satellite images detected a thermal anomaly on 20 November. According to pilot reports, an explosion at 1555 on 30 November generated an ash plume that rose to an altitude of 7.5 km (24,600 ft) a.s.l. and drifted 80 km ESE. The Aviation Color Code remained at Orange. Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Kīlauea (United States) | 25 November-1 December 2015 | Continuing Eruptive Activity Cite this Report
Kīlauea Hawaiian-Emperor Hotspot Volcano Group	HVO reported that seismicity beneath Kīlauea's summit, upper East Rift Zone, and Southwest Rift Zone was at background levels during 25 November-1 December. The lava lake continued to circulate and spatter in the Overlook vent. Webcams recorded multiple incandescent outgassing vents within Puʻu ʻŌʻō; lava flowed from two of the vents on 25 November. The June 27th NE-trending lava flow continued to be active within 6 km NE of Puʻu ʻŌʻō Crater. Source: US Geological Survey Hawaiian Volcano Observatory (HVO)
Rinjani (Indonesia) | 25 November-1 December 2015 | Continuing Eruptive Activity Cite this Report
Rinjani Sunda Volcanic Arc	Based on satellite and ground observations, the Darwin VAAC reported that during 24-30 November ash plumes from Rinjani rose to altitudes of 3.7-4.3 km (12,000-14,000 ft) a.s.l. and drifted as far as 320 km SW and W. Source: Darwin Volcanic Ash Advisory Centre (VAAC)
Sheveluch (Russia) | 25 November-1 December 2015 | Continuing Eruptive Activity Cite this Report
Sheveluch Eastern Kamchatka Volcanic Arc	KVERT reported that during 20-27 November lava-dome extrusion onto Sheveluch’s N flank was accompanied by fumarolic activity, dome incandescence, ash explosions, and hot avalanches. Satellite images detected a daily thermal anomaly over the dome and SE-drifting ash plumes during 22 and 25-26 November. The Aviation Color Code remained at Orange. Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Sinabung (Indonesia) | 25 November-1 December 2015 | Continuing Eruptive Activity Cite this Report
Sinabung Sunda Volcanic Arc	Based on information from PVMBG, the Darwin VAAC reported that on 26 November ash plumes from Sinabung rose to an altitude of 4.3 km (14,000 ft) a.s.l. and drifted SW. On 1 December an ash plume rose to an altitude of 3.4 km (11,000 ft) a.s.l. Source: Darwin Volcanic Ash Advisory Centre (VAAC)
Tungurahua (Ecuador) | 25 November-1 December 2015 | Continuing Eruptive Activity Cite this Report
Tungurahua Northern Andean Volcanic Arc	IG reported high seismic activity at Tungurahua during 25 November-1 December, although the number of earthquakes decreased. During periods of clear weather on most days observers noted gas-and-steam plumes rising as high as 1.5 km and drifting mainly W. Source: 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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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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