Logo link to homepage

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 5 April-11 April 2017
Name Location Eruption Start Date Report Status
Aira Kyushu (Japan) 2017 Mar 25 New
Banda Api Indonesia New
Cerro Azul Isla Isabela (Ecuador) New
Dempo Indonesia New
Ibu Halmahera (Indonesia) 2008 Apr 5 New
Kambalny Southern Kamchatka (Russia) New
Bagana Bougainville (Papua New Guinea) 2000 Feb 28 (in or before) Continuing
Bezymianny Central Kamchatka (Russia) 2010 May 21 (?) Continuing
Bogoslof Fox Islands (USA) Continuing
Chirinkotan Kuril Islands (Russia) Continuing
Cleveland Chuginadak Island (USA) Continuing
Colima Mexico Continuing
Dukono Halmahera (Indonesia) 1933 Aug 13 Continuing
Ebeko Paramushir Island (Russia) 2016 Oct 20 Continuing
Etna Sicily (Italy) 2013 Sep 3 Continuing
Fuego Guatemala 2002 Jan 4 Continuing
Kilauea Hawaiian Islands (USA) Continuing
Klyuchevskoy Central Kamchatka (Russia) Continuing
Nevado del Ruiz Colombia 2017 Dec 18 Continuing
Nevados de Chillan Chile 2016 Jan 8 Continuing
Pacaya Guatemala 2015 Jun 7 ± 1 days Continuing
Sabancaya Peru 2016 Nov 6 Continuing
Sheveluch Central Kamchatka (Russia) 1999 Aug 15 Continuing
Sinabung Indonesia 2020 Aug 8 Continuing
Weekly Reports Archive

Since the Weekly Volcanic Activity Report began in November 2000, there have been 16,153 individual reports over 1,038 weeks (average of 16 per week) on 307 different volcanoes.

Search by Date



Use the dropdowns to choose the year and week for archived Weekly Reports.

Use the dropdowns to choose the year and week for archived Weekly Reports.          



Search by Volcano



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



Download Smithsonian / USGS Weekly Volcanic Activity Report Network CAP Feed

The CAP (Common Alerting Protocol) feeds are XML files specifically formatted for disaster management. They are similar in content to the RSS feed, but contain no active links.



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 Aira
JMA reported that an explosion from the Minamidake summit crater (at Aira Caldera’s Sakurajima volcano) at 1004 on 4 April generated an ash plume that rose 1.2 km above the crater rim. During field work later that day, scientists observed ashfall in Sakurajima Koike-cho in Kagoshima (3 km NW). The Alert Level remained at 3 (on a 5-level scale).
Source: Japan Meteorological Agency (JMA)
Report for Banda Api
PVMBG reported that seismicity at Banda Api had been increasing since the beginning of March, though during 1-4 April seismic patterns were similar to those recorded before an eruption in 1988. The Alert Level was raised to 2 (on a scale of 1-4); visitors and residents were warned not to approach Banda Api within a 1-km radius of the summit area.
Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)
Report for Cerro Azul
IG reported that deformation data showed continued inflation after 20 March, indicating that the volume of the magma intrusion below Cerro Azul's SSE flank had increased. Seismicity decreased after 25 March possibly signifying a halt in the intrusion.
Source: Instituto Geofísico-Escuela Politécnica Nacional (IG)
Report for Dempo
Observers at the PVMBG Dempo observation post reported that during January and February no plumes rose from Dempo's crater, and during 1 March-4 April diffuse white plumes rose no higher than 50 m above the crater. Seismicity increased from 21 March to 4 April. The Alert Level was raised to 2 (on a scale from 1-4) on 5 April. Visitors and residents were advised not to approach the craters within 3 km.
Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)
Report for Ibu
Based on ground observations, PVMBG reported that during 7-8 April ash plumes from Ibu rose to an altitude of 1.7 km (5,500 ft) a.s.l. and drifted N. During 10-11 April ash plumes rose to altitudes of 1.5-1.6 km (4,900-5,200 ft) a.s.l. and drifted S.
Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)
Report for Kambalny
Based on satellite data, KVERT reported that Kambalny was quiet on 1 April. Explosions on 2 April generated ash plumes that rose to an altitude of 7 km (23,000 ft) a.s.l., and then minor ash emissions occurred at least through 6 April. Ash plumes drifted 200 km E and SE during 2-4 April, and a thermal anomaly was identified in satellite images during 3-4 April. The Aviation Color Code remained at Orange.
Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Report for Bagana
Based on analyses of satellite imagery and wind model data, the Darwin VAAC reported that during 6-9 April ash plumes from Bagana rose to an altitude of 2.1 km (7,000 ft) a.s.l. and drifted NE, E, S, and W.
Source: Darwin Volcanic Ash Advisory Centre (VAAC)
Report for Bezymianny
KVERT reported that during 1-6 April lava continued to advance down the NW flank of Bezymianny's lava dome. A thermal anomaly was identified in satellite images daily. The Aviation Color Code remained at Orange.
Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Report for Bogoslof
On 5 April AVO reported that the Aviation Color Code for Bogoslof was lowered to Yellow and the Volcano Alert Level was lowered to Advisory based on the absence of detected activity at the volcano for the past three weeks; the last large explosion occurred on 8 March. No significant volcanic activity was detected in seismic, infrasound, or satellite data during 6-11 April.
Source: US Geological Survey Alaska Volcano Observatory (AVO)
Report for Chirinkotan
Based on Tokyo VAAC data, SVERT reported that on 7 April an ash plume from Chirinkotan rose to an altitude of 5 km (16,400 ft) a.s.l. and drifted NE. The Aviation Color Code remained at Yellow (on a four-color scale).
Source: Sakhalin Volcanic Eruption Response Team (SVERT)
Report for Cleveland
AVO reported that no significant volcanic activity at Cleveland was detected in seismic, infrasound, or satellite data since an explosion occurred on 24 March. The Aviation Color Code was lowered to Yellow and the Volcano Alert Level was lowered to Advisory on 5 April.
Source: US Geological Survey Alaska Volcano Observatory (AVO)
Report for Colima
On 7 April the Centro Universitario de Estudios e Investigaciones de Vulcanologia - Universidad de Colima reported that during the previous week the seismic data revealed 38 high-frequency events, 23 long-period events, 2.4 hours of tremor, 18 landslides, and two low-intensity explosions. The sulfur dioxide flux was as high as 640 tons/day.
Source: Centro Universitario de Estudios e Investigaciones de Vulcanologia - Universidad de Colima
Report for Dukono
Based on analyses of satellite imagery, wind model data, and notices from PVMBG, the Darwin VAAC reported that during 5-11 April ash plumes from Dukono rose to altitudes of 1.8-2.1 km (6,000-7,000 ft) a.s.l. and drifted NE, SE, and S.
Source: Darwin Volcanic Ash Advisory Centre (VAAC)
Report for Ebeko
KVERT reported that during 4-6 April several explosions at Ebeko were observed by residents of Severo-Kurilsk (Paramushir Island) about 7 km E. Ash plumes rose as high as 4 km (13,100 ft) a.s.l. Minor amounts of ash fell in Severo-Kurilsk on 6 April. The Aviation Color Code remained at Orange (the second highest level on a four-color scale).
Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Report for Etna
INGV reported that the eruptive episode that began on 15 March from a vent in the saddle between Etna's Southeast Crater (SEC) - New Southeast Crater (NSEC) cone complex was characterized by Strombolian activity and ash emissions. Lava had traveled down into the Valle del Bove from the W rim; by the afternoon of 18 March almost continuous collapses of parts of the lava flow produced several avalanches of incandescent material which reached the base of the wall. Explosive activity had greatly declined earlier that morning. The collapsing stopped by early the next evening, 19 March, and the lava reached the base of the valley. That lava flow stopped advancing on 20 March though a few lava flows closer to the vent remained active the next few days.

On 21 March a new lava flow expanded SSW, but then stopped in the last days of March at an elevation of 2,300 m. A few more lava flows had followed a similar path in early April and then also stopped at the same elevation. Around 28 March a new pit crater had formed on the S part of the pyroclastic cone which had formed around the SEC-NSEC saddle vent. Strong glow form the pit crater was observed at night.
Source: Sezione di Catania - Osservatorio Etneo (INGV)
Report for Fuego
INSIVUMEH reported that during 6-11 April explosions at Fuego generated ash plumes that rose as high as 850 m above the crater rim and drifted as far as11 km W, SW, and S. Ashfall was reported in areas downwind including Panimaché I and II (8 km SW), Morelia (9 km SW), and Santa Sofía (12 km SW). Rumbling from the explosions was sometimes heard. During 10-11 April incandescent material was ejected 100-150 m above the crater, generating minor avalanches in the area of the cone.
Source: Instituto Nacional de Sismologia, Vulcanologia, Meteorologia, e Hidrologia (INSIVUMEH)
Report for Kilauea
During 5-11 April HVO reported that the lava lake continued to rise, fall, and spatter in Kilauea’s Overlook crater. Webcams recorded incandescence from long-active sources within Pu'u 'O'o Crater, from a vent high on the NE flank of the cone, and from a small lava pond in a pit on the W side of the crater. The 61G lava flow, originating from a vent on Pu'u 'O'o Crater's E flank, continued to enter the ocean at Kamokuna from the end of the lava tube, about 20 m above the water. A growing lava delta was an estimated 25 m out from the base of the sea cliff by 10 April. Surface lava flows were active above the pali and on the coastal plain.
Source: US Geological Survey Hawaiian Volcano Observatory (HVO)
Report for Klyuchevskoy
KVERT reported that during 1-4 April explosions at Klyuchevskoy generated ash plumes that rose to altitudes of 5-6 km (16,400-19,700 ft) a.s.l. Satellite images showed a thermal anomaly over the volcano during 1-2 and 4 April, and ash plumes that drifted 400 km in multiple directions. No explosions were recorded after 4 April; the Aviation Color Code was lowered to Yellow on 10 April.
Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Report for Nevado del Ruiz
Servicio Geológico Colombiano’s (SGC) Observatorio Vulcanológico y Sismológico de Manizales reported that during 4-11 April seismicity at Nevado del Ruiz continued to indicate unrest. Signals indicating fracturing rock slightly increased in both size and number as compared to the previous week. During 10-11 April a period of short-duration and very low energy drumbeat signals were recorded, indicating rising magma. Water vapor and gas continued to be emitted. Gas, steam, and ash plumes rose 1.5 km above the crater rim on 10 April and drifted NW. Thermal anomalies were identified on 4, 6, and 7 April. The Alert Level remained at III (Yellow; the second lowest level on a four-color scale).
Source: Servicio Geológico Colombiano (SGC)
Report for Nevados de Chillan
The Buenos Aires VAAC reported that on 6 and 8 April a webcam recorded ash emissions rising from Nevados de Chillán and dissipating quickly. On 6 April the emissions rose as high as 4 km (13,000 ft) a.s.l. Minor ash emissions were observed on 10 April.
Source: Buenos Aires Volcanic Ash Advisory Center (VAAC)
Report for Pacaya
INSIVUMEH reported that incandescence from Pacaya’s Mackenney cone was visible at night and at dawn during 6-11 April. Weak explosions accompanied by rumbling was sometimes noted.
Source: Instituto Nacional de Sismologia, Vulcanologia, Meteorologia, e Hidrologia (INSIVUMEH)
Report for Sabancaya
Observatorio Vulcanológico del Sur del IGP (OVS-IGP) and Observatorio Vulcanológico del INGEMMET (OVI) reported that during 3-9 April seismicity at Sabancaya declined compared to the previous week, with an average of 27 explosions recorded per day. Ash plumes rose as high as 3.2 km above the crater rim (on 8 April) and drifted more than 40 km NW and NE. Ashfall was reported in Pinchollo (20 km N), Maca, and Chivay. The Buenos Aires VAAC reported that diffuse ash plumes drifted 100 km E on 9 April. Intermittent ash emissions during 10-11 April rose as high as 7 km (23,000 ft) a.s.l. and drifted SE. The Alert Level remained at Orange (the second highest level on a four-color scale).
Sources: Instituto Geofísico del Perú (IGP), Instituto Geológico Minero y Metalúrgico (INGEMMET), Buenos Aires Volcanic Ash Advisory Center (VAAC)
Report for Sheveluch
KVERT reported that during 1-6 April lava-dome extrusion onto Sheveluch’s N flank was accompanied by strong fumarolic activity, dome incandescence, ash explosions, and hot avalanches. Satellite images showed a daily thermal anomaly over the dome, and ash plumes that drifted 20 km SE on 3 April. The Aviation Color Code remained at Orange (the second highest level on a four-color scale).
Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Report for Sinabung
Based on PVMBG observations and wind data, the Darwin VAAC reported that during 7 and 9-11 April ash plumes from Sinabung rose to altitudes of 3.4-8.2 km (11,000-27,000 ft) a.s.l. and drifted E, SE, and WNW.
Source: Darwin Volcanic Ash Advisory Centre (VAAC)