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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, notices of volcanic activity posted on these pages are preliminary and subject to change as events are studied in more detail.

This is not a comprehensive list of all of Earth's volcanoes erupting during the week, but rather a summary of activity that meet criteria discussed in detail in the "Criteria and Disclaimers" section. Carefully reviewed, detailed narratives on various volcanoes are published as reports of the Bulletin of the Global Volcanism Network.

Smithsonian / USGS Weekly Volcanic Activity Report for the week of 10 September-16 September 2014
Name Location Eruption Start Date Report Status
Askja Iceland New
Asosan Kyushu (Japan) New
Bardarbunga Iceland New
Kuchinoerabujima Ryukyu Islands (Japan) New
Kusatsu-Shiranesan Honshu (Japan) New
Mayon Luzon (Philippines) New
Nishinoshima Japan New
Slamet Central Java (Indonesia) New
Aira Kyushu (Japan) 2017 Mar 25 Continuing
Ambrym Vanuatu Continuing
Bezymianny Central Kamchatka (Russia) 2010 May 21 (?) Continuing
Chirpoi Kuril Islands (Russia) Continuing
Copahue Central Chile-Argentina border Continuing
Fuego Guatemala 2002 Jan 4 Continuing
Karymsky Eastern Kamchatka (Russia) Continuing
Kilauea Hawaiian Islands (USA) 2020 Dec 20 Continuing
Pacaya Guatemala 2015 Jun 7 ± 1 days Continuing
Popocatepetl Mexico 2005 Jan 9 Continuing
Reventador Ecuador 2008 Jul 27 Continuing
Santa Maria Guatemala 1922 Jun 22 Continuing
Sheveluch Central Kamchatka (Russia) 1999 Aug 15 Continuing
Shishaldin Fox Islands (USA) Continuing
Tungurahua Ecuador Continuing
Ubinas Peru Continuing
Zhupanovsky Eastern Kamchatka (Russia) Continuing
Weekly Reports Archive

Since the Weekly Volcanic Activity Report began in November 2000, there have been 16,566 individual reports over 1,058 weeks (average of 16 per week) on 310 different volcanoes.

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


Download Smithsonian / USGS Weekly Volcanic Activity Report Network RSS Feed

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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Download Smithsonian/USGS Weekly Volcanic Activity Report Network Link Download Smithsonian / USGS Weekly Volcanic Activity Report Network Link

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 monthly, and 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 Askja
IMO had maintained the Aviation Colour Code for Askja at Yellow since 28 August due to elevated seismicity and localized deformation. On 11 September the Colour Code was reduced to Green when seismicity had diminished significantly.
Source: Icelandic Meteorological Office (IMO)
Report for Asosan
JMA reported that Alert Level 2 at Asosan continued during 8-16 September. A persistent white plume was observed 1,000 m above the crater.

Preliminary counts for volcanic earthquakes (394-564 per day) and tremor (80-174 per day) were reported during 8-15 September. Field surveys conducted on 9 and 12 September yielded elevated temperatures from fumaroles and the surface of the S crater wall.
Source: Japan Meteorological Agency (JMA)
Report for Bardarbunga
During 10-16 September, IMO maintained Aviation Colour Code Orange due to continued activity at Bárdarbunga’s Holuhraun eruptive fissure. Lava flows continued to advance at a consistent rate toward the E and W, and by 13 September, the lava field measured 24.5 km2. The main flow had entered the river bed of Jökulsá á Fjöllum and continued to follow its course; steam rose from the river where the lava was in contact but no explosive activity occurred. Persistent subsidence was detected from the Bárðarbunga caldera; approximately 23 m of total subsidence was measured during a survey on 14 September.

Seismicity persisted mainly around the caldera and the Dyngjujökull glacier. The largest earthquakes, M 5.5, M 5.3, and M 5.0, were detected on 10, 11, and 15 September respectively.

IMO reported continued elevated SO2 emissions during 10-16 September and issued warnings to the public in the municipality of Fjarðarbyggð on 13 September.
Source: Icelandic Meteorological Office (IMO)
Report for Kuchinoerabujima
During 8-16 September JMA reported that Alert Level 3 conditions persisted at Kuchinoerabujima, but no eruptive activity was observed. Low-level seismicity continued and tremor was absent. White plumes were visible on webcamera images rising 800 m from the crater during 8-12 September and to 600 m during 13-16 September. A field survey on 12 September measured SO2 emissions that were similar to pre-eruptive levels (300 tons/day).
Source: Japan Meteorological Agency (JMA)
Report for Kusatsu-Shiranesan
During 5-12 September JMA maintained Alert Level 2 for Kusatsu-Shiranesan due to continued unrest. GPS measurements indicated inflation, although thermal anomalies had been absent since July. Volcanic earthquakes continued at a low level (a maximum of 3 per day) and tremor was absent.
Source: Japan Meteorological Agency (JMA)
Report for Mayon
PHIVOLCS reported Mayon’s earthquakes, rockfall events, and an inflationary trend from leveling surveys on 15 September. A noticeable escalation occurred later that day, including 39 rockfall events and 32 low-frequency volcanic earthquakes. Crater glow became visible around 2000 and PHIVOLCS released an informational bulletin at 2200 announcing Alert Level 3. On 16 September incandescent rockfalls spread to the upper reaches of Bonga Gully on the SE flank.

News reports highlighted the evacuation orders announced by the governor of Albay province, which included the 6 km permanent danger zone surrounding the volcano; an assisted evacuation was enforced for the 6-8 km extended danger zone. In an interview with the press, the governor noted that some residents had already fled their homes in Guinobatan (11.8 km SW) on the evening of 15 September.
Sources: Philippine Institute of Volcanology and Seismology (PHIVOLCS), ABS-CBN News
Report for Nishinoshima
The Tokyo VAAC reported an ash plume from Nishinoshima that rose to an altitude of about 3 km (10,000 ft) a.s.l. and drifted S on 16 September.

The University of Hawaii reported that satellite data from the Moderate Resolution Imaging Spectroradiometer (MODIS) resulted in frequent MODVOLC alerts for Nishinoshima, as recently as 11 September.
Sources: Hawai'i Institute of Geophysics and Planetology (HIGP) Thermal Alerts Team, Tokyo Volcanic Ash Advisory Center (VAAC)
Report for Slamet
PVMBG reported explosive activity from Slamet during 4-12 September. During the past week, activity peaked with incandescent explosions; rumbling sounds were heard by scientists at the Slamet observation post. On 11 September the largest ash plume was observed (200-1,500 m above the summit) and incandescent plumes reached 400 m above the summit. Seismicity was dominated by emissions and explosion signals. Deformation data indicated that relatively little pressure was accumulating due to magma movement. PVMBG maintained the Alert Level 3 (on a scale of 1-4).
Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)
Report for Aira
During 8-16 September JMA maintained Alert Level 3 for Aira Caldera’s Sakurajima volcano. Volcanic earthquakes and tremor were detected during this time period. There were 12 explosions that ejected tephra up to 1,300 m above Showa crater. Sustained eruptions from the crater were recorded on 10 and 11 September and nighttime incandescence was detected during 11-16 September.

During 10-16 September JMA reported ash eruptions, causing the Tokyo VAAC to issue regular advisories; however, ash was not visible in satellite images.
Sources: Japan Meteorological Agency (JMA), Tokyo Volcanic Ash Advisory Center (VAAC)
Report for Ambrym
On 11 September, the Vanuatu Geohazards Observatory reported increased seismicity from Ambrym and raised the Alert Level from 1 to 2 (on a scale of 0-4).
Source: Vanuatu Meteorology and Geo-Hazards Department (VMGD)
Report for Bezymianny
KVERT maintained Alert Level Yellow during the week of 12 September for Bezymianny. Weak seismic activity continued, and according to video data, moderate gas and steam activity occurred, although the volcano was frequently obscured by clouds. Satellite data showed a weak thermal anomaly over the volcano during 4-5 and 11 September.
Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Report for Chirpoi
During 1 to 16 September thermal anomalies were detected from Chirpoi in satellite images when clear conditions permitted. On 4 September SVERT increased the Aviation Color Code from Green to Yellow due to renewed activity including thermal anomalies. Gas-and-steam plumes were visible on 11 and 15-16 September.
Source: Sakhalin Volcanic Eruption Response Team (SVERT)
Report for Copahue
On 14 September SERNAGEOMIN reported elevated seismicity from Copahue. A seismic swarm occurred during 1200-1900 comprising 389 LP earthquakes; epicenters were within the crater area and hypocenters were at depths less than 3 km. SERNAGEOMIN noted that this unrest was similar to that from May and October 2013. Web cameras located nearby captured a persistent vapor plume that reached ~250 m above the crater and drifted ~700 m ENE. The Alert Level remained at Yellow.
Source: Servicio Nacional de Geología y Minería (SERNAGEOMIN)
Report for Fuego
During 10-16 September INSIVUMEH reported that white fumarolic plumes rose 200-600 m above Fuego’s summit. Variable explosions generated ash plumes 500-1,00 m above the summit; during 24-hour periods there were daily counts of 28, 32, 21, 12, 0, 8, and 11. The lava flow was active within the Ceniza drainage (SSW) on 13 September and had extended 100 m.

Moderate rumbling was heard and shockwaves caused roofs to shake on some houses near the volcano. On 10-13, 15, and 16 September incandescent plumes were observed 100-200 m above the crater.

Weak avalanches were frequently channeled into the drainages of Ceniza, Trinidad (S), Taniluyá (SW), Santa Teresa (W), Las Lajas (SE), and Honda (E) during 10-16 September.

During 10-13 and 15 September fine gray ash from explosions fell over the areas of Sangre de Cristo (8 km WSW), Panimaché I and II (8 km SW), Morelia (10 km SW), Santa Sofía (12 km SW), and others. During 14 September ashfall was reported in Yepocapa (8 km WNW), Panimaché, Sangre de Cristo, Morelia, and others. During 16 September ashfall was reported in Alotenango (8 km ENE), Antigua (18 km NE), Ciudad Vieja (13.5 km NE), and other areas.
Source: Instituto Nacional de Sismologia, Vulcanologia, Meteorologia, e Hidrologia (INSIVUMEH)
Report for Karymsky
KVERT reported that moderate-to-weak seismic activity continued at Karymsky and maintained Yellow Alert during the week of 12 September. On 10 September satellite data showed an ash plume at that extended about 100 km SE. The volcano was quiet or obscured by clouds on the other days of week.

According to the Tokyo VAAC, ash plumes were detected by satellite images during 10 and 16 September. Plume heights were 2,100-3,000 m (7,000-10,000 ft) a.s.l..
Sources: Kamchatkan Volcanic Eruption Response Team (KVERT), Tokyo Volcanic Ash Advisory Center (VAAC)
Report for Kilauea
During 10-16 September HVO reported that the circulating lava lake occasionally rose and fell in the deep pit within Kilauea's Halema'uma'u Crater, remaining 50-60 m below the Overlook Crater rim. Elevated gas emissions were detected during the week of 9 September, with amounts of 3,300-6,700 tonnes per day, and persisted through this reporting period. The plume from the vent continued to deposit variable amounts of ash, spatter, and Pele's hair onto nearby areas; smaller particles may have fallen several kilometers away.

During 10-16 September little change was recorded from Pu`u `O`o; glow was visible overnight above several outgassing openings in the crater floor. By 16 September the NE-trending lava flow extended 15.5 km from the vent, placing the active flow front within the NW portion of the Kaohe Homesteads, a vacant forested portion of the subdivision. The flow had advanced at an average rate of 215 m/day between 12 and 15 September and continued to generate smoke and localized fires as it spread through the forest.

The Aviation Color Code remained at Orange and the Volcano Alert Level remained at Warning.
Source: US Geological Survey Hawaiian Volcano Observatory (HVO)
Report for Pacaya
During 10-16 September INSIVUMEH reported that a weak fumarolic plume was frequently visible rising 50-75 m above the summit of Pacaya. The plume tended to drift 500-600 m S, SW, and W. On 14 September, B-type earthquakes were detected associated with gas emissions.
Source: Instituto Nacional de Sismologia, Vulcanologia, Meteorologia, e Hidrologia (INSIVUMEH)
Report for Popocatepetl
During 10-16 September CENAPRED maintained Alert Level Yellow Phase 2 for Popocatepetl. Nighttime incandescence from the crater was visible during this time. Low-intensity exhalations were observed during 24-hour periods with consecutive daily counts of 31, 5, 7, 36, 64, 36, and 1. VT earthquakes of magnitude 1.9 and 2.2 was detected on 11 and 13 September, respectively. Weather conditions frequently prevented visual observations.
Source: Centro Nacional de Prevencion de Desastres (CENAPRED)
Report for Reventador
IG reported moderate volcanic activity including explosions, long-period earthquakes, and tremor at Reventador during 10-16 September. On 10 September continuous steam with minor ash plumes rose 1,000 m above the summit and drifted NW. Cloudy conditions frequently obscured views of the summit.
Source: Instituto Geofísico-Escuela Politécnica Nacional (IG)
Report for Santa Maria
During 10-16 September INSIVUMEH reported white fumarolic plumes rising 150-500 m above Santa Maria’s active cone, Santiaguito. The active lava flow on the E flank continued to generate ash plumes and incandescence. On 14 September INSIVUMEH observed that the lava flow advancing within the Nimá 1 drainage had reached a total of 3,500 m from the summit.

INSIVUMEH reported hot lahars in the drainages of Cabello de Ángel and Río Nimá 1 on 11 September. Tree trunks and branches were entrained and the flow was 20 m wide and 2 m deep. Moderate vibrations could be felt from the ground as it passed the observatory; sulfur odors were also noticed.
Source: Instituto Nacional de Sismologia, Vulcanologia, Meteorologia, e Hidrologia (INSIVUMEH)
Report for Sheveluch
KVERT reported that the explosive and effusive eruption of Shiveluch continued and maintained Alert Level Orange during the week of 12 September. Activity was dominated by lava dome growth on the SE flank, moderate ash explosions, fumarolic activity, and hot avalanches. Satellite data showed a persistent thermal anomaly from the dome region during 4-5, 7 and 11 September. Remobilized ash was observed in a dust plume on 11 September that rose 1-2 km (3,280-6,562 ft) a.s.l. and drifted SE.
Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Report for Shishaldin
AVO reported that low-level seismicity and eruptive activity continued from Shishaldin during 10-16 September. Observations were frequently restricted due to cloudy conditions, although elevated temperatures were observed on 15 September in one satellite image.
Source: US Geological Survey Alaska Volcano Observatory (AVO)
Report for Tungurahua
IG reported moderate volcanic activity including explosions, long-period earthquakes, and tremor at Tungurahua during 10-16 September. On 10 September a minor ash plume was visible drifting SE from the summit. Ahfall was reported in the area of Quero (20 km NW) and Tisaleo (29 km NW) on 10 September. In the morning of 11 September, small explosions were reported that generated rockfalls on the flanks. Moderate rainfall on 12 and 15 September generated lahars within the NW drainages of Achupashal and La Pampa. Light ashfall was reported from Cusúa (~8 km NW of the summit) on 16 September and, during clear viewing conditions, snowfall was noted on Tungurahua’s upper flanks. Cloudy conditions frequently obscured views of the summit.
Source: Instituto Geofísico-Escuela Politécnica Nacional (IG)
Report for Ubinas
During 10-16 September IGP reported that the eruption of Ubinas was continuing and maintained Alert Level Orange. On 10 September there were 15 explosions with plumes 900-1,700 m above the crater and 10 exhalation events; on 11 September there was one explosion with a plume 3,000 m above the crater and 8 exhalation events (600-900 m above the crater). There were no explosions or exhalations during 12-16 September, although seismicity (LP, VT, and hybrid earthquakes) continued except on 13 September when hybrid earthquakes were absent.
Source: Instituto Geofísico del Perú (IGP)
Report for Zhupanovsky
KVERT reported ashfall from Zhupanovsky in the area of IVS FEB RAS (Petropavlovsk-Kamchatsky) during 1100-1300 on 7-8 September. The moderate explosive eruption continued and Alert Level Orange was maintained through the week of 12 September. According to visual data, ash plumes extended about 50 and 70 km S and SE of the volcano on 10 and 11 September, respectively. Persistent thermal anomalies were detected from the summit area based on satellite images during 4-5 and 10-11 September.

Satellite data showed ash plumes up to 3.5-4.0 km (11,500-13,100 ft) a.s.l. mainly during 9-11 September, and ash plumes drifted about 1,113 km SE and S.

According to the Tokyo VAAC, ash plumes were detected by satellite images during 10-16 September with the exception of 15 September. Plume heights were 2,400-3,700 m (8,000-12,000 ft) a.s.l..
Sources: Kamchatkan Volcanic Eruption Response Team (KVERT), Tokyo Volcanic Ash Advisory Center (VAAC)