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Smithsonian / USGS Weekly Volcanic Activity Report

Weekly Volcanic Activity Map

The Weekly Volcanic Activity Report is a cooperative project between the Smithsonian's Global Volcanism Program and the US Geological Survey's Volcano Hazards Program. Updated by 2300 UTC every Wednesday and averaging 16 reported volcanoes, this is not a comprehensive list of all eruptions this week, but rather a summary of activity that meet criteria discussed in the "Criteria and Disclaimers" section below.

Volcanic activity reported here is preliminary and subject to change. Carefully reviewed, detailed narratives over longer time periods are published as reports of the Bulletin of the Global Volcanism Network available through volcano profile pages.

Smithsonian / USGS Weekly Volcanic Activity Report for the week of 29 October-4 November 2008
Name Location Eruption Start Date Report Status
Chaiten Southern Chile New
Colima Mexico New
Galeras Colombia New
Klyuchevskoy Central Kamchatka (Russia) New
Nevado del Huila Colombia New
Karymsky Eastern Kamchatka (Russia) Continuing
Kilauea Hawaiian Islands (USA) 2021 Sep 29 Continuing
Masaya Nicaragua 2015 Oct 3 Continuing
Pacaya South-Central Guatemala Continuing
Piton de la Fournaise Reunion Island (France) Continuing
Popocatepetl Mexico 2005 Jan 9 Continuing
Rabaul New Britain (Papua New Guinea) Continuing
Sheveluch Central Kamchatka (Russia) 1999 Aug 15 Continuing
Soufriere Hills Montserrat Continuing
Suwanosejima Ryukyu Islands (Japan) 2004 Oct 23 Continuing
Tungurahua Ecuador Continuing
Ubinas Peru Continuing
All times are local unless otherwise stated.
Weekly Reports Archive

Since the Weekly Volcanic Activity Report began in November 2000, there have been 18,389 individual reports over 1,142 weeks (average of 16 per week) on 328 different volcanoes.

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Agung Cotopaxi Iliamna Little Sitkin Planchon-Peteroa Stromboli
Ahyi Cuicocha Iliwerung Llaima Poas Sulu Range
Aira Cumbal Inielika Lokon-Empung Popocatepetl Sumbing
Akan Dabbahu Ioto Lonquimay Purace Sundoro
Alaid Davidof Irazu Lopevi Puyehue-Cordon Caulle Suretamatai
Alu-Dalafilla Dempo Iya Machin Rabaul Suwanosejima
Ambae Descabezado Grande Izu-Torishima Makushin Raikoke Taal
Ambang Dieng Volcanic Complex Jackson Segment Maly Semyachik Ranakah Tair, Jebel at
Ambrym Dukono Kaba Manam Raoul Island Takawangha
Anatahan Ebeko Kadovar Manda Hararo Rasshua Talang
Aniakchak Ebulobo Kaitoku Seamount Marapi Raung Tambora
Antillanca Volcanic Complex Edgecumbe Kama'ehuakanaloa Maroa Redoubt Tanaga
Antuco Egon Kambalny Martin Reventador Tandikat-Singgalang
Apoyeque Ekarma Kanaga Masaya Reykjanes Tangkoko-Duasudara
Arenal Epi Kanlaon Maule, Laguna del Rincon de la Vieja Tangkuban Parahu
Asamayama Erebus Karangetang Mauna Loa Rinjani Tara, Batu
Askja Erta Ale Karkar Mayon Ritter Island Ta'u
Asosan Etna Karthala McDonald Islands Rotorua Taupo
Atka Volcanic Complex Etorofu-Yakeyama [Grozny Group] Karymsky Melimoyu Ruang Telica
Augustine Eyjafjallajokull Kasatochi Merapi Ruapehu Tenerife
Avachinsky Fagradalsfjall Katla Midagahara Ruiz, Nevado del Tengger Caldera
Awu Fernandina Katmai Misti, El Sabancaya Three Sisters
Axial Seamount Fogo Kavachi Miyakejima Sakar Tinakula
Azul, Cerro Fonualei Kelimutu Momotombo Salak Tofua
Azumayama Fournaise, Piton de la Kelud Monowai San Cristobal Tokachidake
Bagana Fourpeaked Kerinci Montagu Island San Miguel Tolbachik
Balbi Fuego Ketoi Moyorodake [Medvezhia] San Vicente Toliman
Bamus Fujisan Kharimkotan Mutnovsky Sangay Tongariro
Banda Api Fukutoku-Oka-no-Ba Kick 'em Jenny Myojinsho Sangeang Api Trident
Bardarbunga Galeras Kie Besi Nabro Santa Ana Tungurahua
Barren Island Galunggung Kikai Negra, Sierra Santa Maria Turrialba
Batur Gamalama Kilauea Negro, Cerro Sao Jorge Ubinas
Bezymianny Gamkonora Kirishimayama Nightingale Island Sarigan Ugashik-Peulik
Bogoslof Gareloi Kita-Ioto Nishinoshima Sarychev Peak Ukinrek Maars
Brava Gaua Kizimen Nisyros Saunders Ulawun
Bristol Island Gorely Klyuchevskoy Novarupta Savo Unnamed
Bulusan Great Sitkin Kolokol Group NW Rota-1 Semeru Unnamed
Calbuco Grimsvotn Koryaksky Nyamulagira Semisopochnoi Veniaminof
Callaqui Guagua Pichincha Krakatau Nyiragongo Seulawah Agam Villarrica
Cameroon Guallatiri Krummel-Garbuna-Welcker Ofu-Olosega Sheveluch Vulcano
Campi Flegrei del Mar di Sicilia Guntur Krysuvik-Trolladyngja Okataina Shishaldin West Mata
Cayambe Hachijojima Kuchinoerabujima Okmok Simbo Westdahl
Chachadake [Tiatia] Hakoneyama Kurikomayama Ontakesan Sinabung Whakaari/White Island
Chaiten Heard Kusatsu-Shiranesan Oraefajokull Sinarka Witori
Chiginagak Hekla Kverkfjoll Osorno Siple Wolf
Chikurachki Helgrindur La Palma Pacaya Sirung Yakedake
Chiles-Cerro Negro Hierro Lamington Pagan Slamet Yasur
Chillan, Nevados de Hokkaido-Komagatake Lamongan Palena Volcanic Group Snaefellsjokull Yufu-Tsurumi
Chirinkotan Home Reef Langila Paluweh Soputan Zaozan [Zaosan]
Chirpoi Hood Lanin Panarea Sorikmarapi Zavodovski
Ciremai Huaynaputina Lascar Papandayan Sotara Zhupanovsky
Cleveland Hudson, Cerro Lateiki Parker Soufriere Hills Zubair Group
Colima Huila, Nevado del Lengai, Ol Doinyo Pavlof Soufriere St. Vincent
Colo Hunga Tonga-Hunga Ha'apai Leroboleng Pelee South Sarigan Seamount
Concepcion Ibu Lewotobi Peuet Sague Spurr
Copahue Ijen Lewotolok Pinatubo St. Helens
 News Feeds and Google Placemarks


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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 Geologic Summary, and a link to the volcano's page from the Global Volcanism Program. At the end of each report is a list of the sources used. Each volcano report includes a link from the volcano's name back to the more complete information in the Weekly Volcanic Activity Report on the Smithsonian website. This feature was first made available on 5 March 2008.



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A Google Earth network link for the Weekly Volcanic Activity Report can be loaded into the free Google Earth software, and in turn will load placemarks for volcanoes in the current weekly report. Placemark balloons include the volcano name, report date, report text, sources, and links back to the GVP volcano profile page and to the complete Weekly Report for that week. This feature was first made available on 1 April 2009.

 Criteria & Disclaimers

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 more-or-less continuous eruptive activity for decades or longer, and such routine activity is typically not reported here. Moreover, Earth's sea-floor volcanism is seldom reported even though in theory it represents the single most prolific source of erupted material. 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.

Volcanoes are included in the "New Activity/Unrest" section of the Weekly Volcanic Activity Report if the activity occurs after at least 3 months of quiescence. Once a volcano is included in the "New Activity/Unrest" section, updates will remain in that section unless the activity continues for more than 1 month without escalating, after which time updates will be listed in the "Continuing Activity" section. Volcanoes are also included in the "New Activity/Unrest" section if the volcano is undergoing a period of relatively high unrest, or increasing unrest. This is commonly equal to Alert Level Orange on a scale of Green, Yellow, Orange, Red, where Red is the highest alert. Or alert level 3 on a scale of 1-4 or 1-5.

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 receive a report.

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. Because of our emphasis on rapid reporting on the web we have avoided diacritical marks. 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.

5. USGS Disclaimer Statement for this Website:

Information presented on this website is considered public information and may be distributed or copied. Use of appropriate byline/photo/image credit is requested. We strongly recommend that USGS data be acquired directly from a USGS server and not through other sources that may change the data in some way. While USGS makes every effort to provide accurate and complete information, various data such as names, telephone numbers, etc. may change prior to updating. USGS welcomes suggestions on how to improve our home page and correct errors. USGS provides no warranty, expressed or implied, as to the accuracy, reliability or completeness of furnished data.

Some of the documents on this server may contain live references (or pointers) to information created and maintained by other organizations. Please note that USGS does not control and cannot guarantee the relevance, timeliness, or accuracy of these outside materials.

For site security purposes and to ensure that this service remains available to all users, this government computer system employs software programs to monitor network traffic to identify unauthorized attempts to upload or change information, or otherwise cause damage. Unauthorized attempts to upload information or change information on this website are strictly prohibited and may be punishable under the Computer Fraud and Abuse Act of 1986 and the National Information Infrastructure Protection Act. Information may also be used for authorized law enforcement investigations. (Last modified September 21, 1999.)

U.S. Department of the Interior, U.S. Geological Survey, Reston, VA, USA
URL: https://volcano.si.edu/reports_weekly.cfm

 Acronyms and Abbreviations

a.s.l. - above sea level

AVO - Alaska Volcano Observatory

AVHRR - Advanced Very High Resolution Radiometer

CENAPRED - Centro Nacionale de Prevencion de Desastres (México)

CONRED - Coordinadora Nacional para la Reducción de Desastres

COSPEC - Correlation Spectrometer

CVGHM (formerly VSI) - Center of Volcanology and Geological Hazard Mitigation

CVO - Cascades Volcano Observatory (USGS)

GMS - Geostationary Meteorological Satellite

GOES - Geostationary Operational Environmental Satellite

GVO - Goma Volcano Observatory

GVP - Global Volcanism Program (Smithsonian Institution)

HVO - Hawaiian Volcano Observatory (USGS)

ICE - Instituto Costarricense de Electricidad (Costa Rica)

IG - Instituto Geofísico (Ecuador)

IGNS - Institute of Geological and Nuclear Sciences (New Zealand) - now GNS Science

INETER - Instituto Nicaragüense de Estudios Territoriales (Nicaragua)

INGEMMET - Instituto Geológical Minero y Metalúrgico (Peru)

INGEOMINAS - Instituto Colombiano de Geología y Minería (Colombia)

INGV-CT - Istituto Nazionale di Geofisica e Vulcanologia - Sezione di Catania (Italy)

INSIVUMEH - Instituto Nacional de Sismologia, Vulcanologia, Meteorologia e Hidrologia (Guatemala)

IRD - Institut de Recherche pour le Développement (France)

JMA - Japanese Meteorological Agency

KEMSD - Kamchatkan Experimental and Methodical Seismilogical Department

KVERT - Kamchatkan Volcanic Eruption Response Team

M - magnitude

METEOSAT - Meteorological Satellite

MEVO - Mount Erebus Volcano Observatory

MODIS - Moderate Resolution Imaging Spectroradiometer

MVO - Montserrat Volcano Observatory

MWO - Meteorological Watch Office

NEIC - National Earthquake Information Center

NIED - National Research Institute for Earth Science and Disaster Prevention (Japan)

NOAA - National Oceanic and Atmospheric Administration

NOTAM - Notice to Airmen

OVDAS - Observatorio Volcanologico de los Andes del Sur (Chile)

OFDA - Office of US Foreign Disaster Assistance

ONEMI - Oficina Nacional de Emergencia - Ministerio del Interior (Chile)

OVPDLF - Observatoire Volcanologique du Piton de la Fournaise (France)

OVSICORI-UNA - Observatorio Vulcanologico y Sismologico de Costa Rica, Universidad Nacional (Costa Rica)

PHIVOLCS - Philippine Institute of Volcanology and Seismology (Philippines)

RSAM - Real-time Seismic Amplitude Measurement

RVO - Rabaul Volcano Observatory

SERNAGEOMIN - Servicio Nacional de Geologia y Mineria (Chile)

SIGMET - Significant Meteorological Information

SNET - Servicio Nacional de Estudios Territoriales (El Salvador)

SVERT - Sakhalin Volcanic Eruption Response Team (Russia)

USAID - US Agency for International Development

USGS - United States Geological Survey

UTC - Coordinated Universal Time

VAAC - Volcanic Ash Advisory Center

VAFTAD - Volcanic Ash Forecast Transport And Dispersion

VDAP - Volcano Disaster Assistance Program (USGS)

VHP - Volcano Hazards Program (USGS)

VRC - Volcano Research Center (Japan)

Report for Chaiten
On 29 October, SERNAGEOMIN received reports of an increase in activity at Chaitén characterized by several explosions that darkened the plume and caused it to rise from about 1.6 km (5,200 ft) a.s.l to about 3.1 km (10,200 ft) a.s.l. SERNAGEOMIN reported that variations in seismicity remained similar to patterns detected during the pervious weeks. A gas plume was continually emitted to an altitude of 3.1 km (10,200 ft) a.s.l. during the previous week. ONEMI reported that during an overflight on 30 October, scientists observed a landslide that had originated from the active lava dome. The next day observers described a plume emitted from multiple areas that rose to an altitude of 2.1 km (6,900 ft) a.s.l. The white component of the plume (steam and gas) emitted mainly from the center and S parts of the lava dome. Vents on the N and NE area produced a gray plume. The Alert Level remained Red.

Based on observations of satellite imagery, Puerto Montt Flight Information Region (FIR) notices, web camera views, SIGMET notices, and pilot reports, the Buenos Aires VAAC reported that during 29-30 October and 1-3 November ash plumes from Chaitén rose to altitudes 2.4-3.7 km (8,000-12,000 ft) a.s.l. and drifted N, NE, and E. Thermal anomalies were present on 30 October and 2 November.

On 4 November, SERNAGEOMIN reported that a recent overflight confirmed the presence of a second new lava dome. The new dome grew in the NE part of the first dome that started to form in May 2008, and had a diameter of about 300 m and a height of about 150 m. Spines protruded from the top. Seismicity was concentrated underneath that area.
Sources: Servicio Nacional de Geología y Minería (SERNAGEOMIN), Oficina Nacional de Emergencia-Ministerio del Interior (ONEMI), Buenos Aires Volcanic Ash Advisory Center (VAAC)
Report for Colima
White plumes from Colima were observed rising to altitudes of 4.1-4.3 km (13,500-14,100 ft) a.s.l. during 30-31 October and 2 November. Gray plumes seen on 2 November rose to an altitude of 4.6 km (15,100 ft) a.s.l. Plumes drifted mainly SW and E.
Source: Gobierno del Estado de Colima
Report for Galeras
On 4 November, INGEOMINAS reported that during the previous week pulsating white plumes, occasionally tinged gray or blue, rose from Galeras to altitudes of 4.5-6.8 km (14,800-22,300 ft) a.s.l. and drifted W. During an overflight on 30 October, incandescence was observed on some parts of the lava dome.
Source: Servicio Geológico Colombiano (SGC)
Report for Klyuchevskoy
KVERT reported that seismic activity at Kliuchevskoi was above background levels during 24-31 October. Video and visual observations showed fumarolic activity during 24-25 and 28-30 October. "Bursting" sounds from the volcano were heard in Klyuchi, about 30 km to the NE. Analysis of satellite imagery revealed a daily thermal anomaly in the crater. The Level of Concern Color Code remained Orange.
Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Report for Nevado del Huila
INGEOMINAS reported that on 3 November residents in an area to the S of Nevado del Huila observed intense fumarolic activity from at or near the summit that was white in color and turned grayish for short intervals. Residents of Wila, Tóez, and Plan de Caloto, to the SW, reported ashfall and strong sulfur odors.
Source: Servicio Geológico Colombiano (SGC)
Report for Karymsky
KVERT reported that seismic activity at Karymsky was above background levels during 24-27 October and at background levels during 28-31 October. Possible explosions may have generated ash plumes to an altitude of 2.8 km (9,200 ft) a.s.l. Analysis of satellite imagery revealed a thermal anomaly in the crater on 23, 24, and 28 October; clouds prevented observations on the other days. The Level of Concern Color Code remained at Orange.

Based on analysis of satellite imagery and information from KEMSD, the Tokyo VAAC reported that an eruption generated a plume to an altitude of 4 km (13,000 ft) a.s.l. on 2 November.
Sources: Kamchatkan Volcanic Eruption Response Team (KVERT), Tokyo Volcanic Ash Advisory Center (VAAC)
Report for Kilauea
HVO reported that during 29 October-4 November lava flowed SE through a tube system from underneath Kilauea's Thanksgiving Eve Breakout (TEB) and rootless shield complex, reaching the Waikupanaha ocean entry. Thermal anomalies detected on satellite imagery indicated active surface flows, especially in the abandoned Royal Gardens subdivision. Explosive activity at the ocean entry was reported on 31 October and 1 November. The sulfur dioxide emission rate at Pu'u 'O'o was 1,200 and 1,700 tonnes per day on 30 October and 3 November, respectively, half of the background rate of the 2005-2007 average.

During the reporting period, Kilauea earthquakes were variously located beneath and to the S of the caldera and along the S-flank fault. Beneath Halema'uma'u crater earthquakes ranged from 40 to 60 (background is about 40), but were too small to be located more precisely. The vent in Halema'uma'u crater continued to produce a predominantly white plume that drifted mainly SW. Night-time incandescence was intermittently seen at the base of the plume, and sounds resembling distant surf and rock clattering were heard in the vicinity of the crater. The sulfur dioxide emission rate was 500-700 tonnes per day during 29-31 October and 3 November. The 2003-2007 rate average was 140 tonnes per day.
Source: US Geological Survey Hawaiian Volcano Observatory (HVO)
Report for Masaya
Based on analysis of satellite imagery, the Washington VAAC reported that on 4 and 5 November possible diffuse ash and steam plumes from Masaya drifted SW and S.
Source: Washington Volcanic Ash Advisory Center (VAAC)
Report for Pacaya
Based on analysis of satellite imagery, the Washington VAAC reported that on 2 November a possible ash-and-gas plume was emitted from Pacaya and drifted E. On 3 November, INSIVUMEH reported that fumarolic plumes drifted S at a low altitude. Ash occasionally entrained by strong winds drifted S. Multiple lava flows on the S and SW flanks of MacKenney cone traveled a maximum distance of 400 m on 3 and 4 November, and continued to fill in the area between the cone and Cerro Chino crater to the N. Fumarolic plumes drifted E on 4 November.
Sources: Washington Volcanic Ash Advisory Center (VAAC), Instituto Nacional de Sismologia, Vulcanologia, Meteorologia, e Hidrologia (INSIVUMEH)
Report for Piton de la Fournaise
OVPDLF reported that a seismic crisis at Piton de la Fournaise on 31 October was characterized by hundreds of earthquakes. The Alert Level was not changed.
Source: Observatoire Volcanologique du Piton de la Fournaise (OVPF)
Report for Popocatepetl
CENAPRED reported that emissions of steam and gas from Popocatépetl were visible during 29 October-4 November. The plumes occasionally contained slight amounts of ash.
Source: Centro Nacional de Prevencion de Desastres (CENAPRED)
Report for Rabaul
RVO reported that during 27 October-2 November ash plumes from Rabaul caldera's Tavurvur cone rose to an altitude of 1.7 km (5,600 ft) a.s.l. and drifted NW and SE. Ashfall was reported in areas downwind. Sub-continuous incandescence from the vent was observed and rumbling and roaring noises were reported on some days. Explosions or forceful emissions sometimes ejected incandescent lava fragments.

Based on analysis of satellite imagery, the Darwin VAAC reported that on 3 November ash plumes rose to an altitude of 2.4 km (8,000 ft) a.s.l.
Sources: Darwin Volcanic Ash Advisory Centre (VAAC), Rabaul Volcano Observatory (RVO)
Report for Sheveluch
KVERT reported that seismic activity at Shiveluch was above background levels during 24-31 October. Based on interpretations of seismic data, a large number of hot avalanches were inferred to have descended the lava dome and produced ash plumes that rose to an altitude of 5.2 km (17,100 ft) a.s.l. Ash plumes that rose to an altitude of 5 km (16,400 ft) a.s.l. were seen on 24 October. Fumarolic activity was visible on the web camera during 23-25 and 28-30 October. Analysis of satellite imagery revealed a daily thermal anomaly on the lava dome. The Level of Concern Color Code remained at Orange.

Based on information from KEMSD and analysis of satellite imagery, the Tokyo VAAC reported that on 2 and 4 November eruption plumes rose to altitudes of 5.2 and 4.6 km (17,000 and 15,000 ft) a.s.l., respectively.
Sources: Kamchatkan Volcanic Eruption Response Team (KVERT), Tokyo Volcanic Ash Advisory Center (VAAC)
Report for Soufriere Hills
MVO reported that during 24-31 October the activity level at the Soufrière Hills lava dome was low. There was no evidence of lava extrusion. On 26 October, observers aboard a fixed-wing aircraft confirmed that a few small pyroclastic flows traveled about 1.5 km down the Tar River Valley. Erosion down several V-shaped chutes continued at the E and SE bases of the dome further deepened the moat in the talus around the dome. Ongoing erosion of the talus pile on the W flank resulted in a well-incised network of gullies leading into the White River. On 27 October, a small pyroclastic flow seen from MVO traveled about 1 km down the Tar River Valley and generated a small ash plume that drifted over unpopulated areas to the W and SW, towards Plymouth. The Hazard Level remained at 3.
Source: Montserrat Volcano Observatory (MVO)
Report for Suwanosejima
Based on information from JMA, the Tokyo VAAC reported that during 29-30 October and 3 November Suwanose-jima produced explosion or eruption plumes that rose to altitudes of 1.5-1.8 km (5,000-6,000 ft) a.s.l. and drifted E. Explosions were reported on 31 October and 1 November, but details of possible ash plumes were not reported.
Source: Tokyo Volcanic Ash Advisory Center (VAAC)
Report for Tungurahua
The IG reported that inclement weather mostly prevented observations of Tungurahua from 28 October to 4 November; steam plumes were noted on 2 November. On 28 October a lahar lasting about 30 minutes descended the Vascún River to the N. Lahars caused by rain descended multiple drainages on 1 November. Blocks about 50-70 cm in diameter were reported in Juive, (about 7 km NNW), La Pampas, (about 6 km S), and Bilbao (about 8 km N). Rolling blocks up to 1 m in diameter were reported in the SW. Residents bordering the Vascún River temporarily evacuated and then returned to their homes after the rain stopped.
Source: Instituto Geofísico-Escuela Politécnica Nacional (IG)
Report for Ubinas
Based on SIGMET notices, the Buenos Aires VAAC reported that on 31 October ash plumes were continuously emitted from Ubinas and rose to altitudes of 5.5-6.7 km (18,000-22,000 ft) a.s.l. The plumes drifted E.
Source: Buenos Aires Volcanic Ash Advisory Center (VAAC)