All times are local unless otherwise stated.

Ciremai | 24 June-30 June 2015 | New Activity / Unrest Cite this Report
Ciremai Western Java	According to the Darwin VAAC a pilot observed a small "smoke" plume rising from Cereme on 24 June; ash was not identified in satellite images. Source: Darwin Volcanic Ash Advisory Centre (VAAC)
Cleveland | 24 June-30 June 2015 | New Activity / Unrest Cite this Report
Cleveland Chuginadak Island (USA)	AVO reported that no significant activity was detected at Cleveland in seismic or infrasound data during 24-30 June. Elevated surface temperatures were detected during 28-30 June, and webcam images from 29 June showed fresh ash deposits at the summit. The Aviation Color Code remained at Yellow and the Volcano Alert Level remained at Advisory. Source: US Geological Survey Alaska Volcano Observatory (AVO)
Colo | 24 June-30 June 2015 | New Activity / Unrest Cite this Report
Colo Sulawesi	PVMBG reports that seismicity significantly increased on 8 June, particularly volcanic and shallow-volcanic earthquakes; 12 volcanic earthquakes were recorded on 22 June (previously, 1-5 events per day had been recorded), and there were 11 shallow volcanic earthquakes on 23 June (previously, 1-8 events per day had been recorded). On 24 June the Alert Level was raised to 2 (on a scale of 1-4). However, observers at the Colo Volcano Observation Post in the Wakai village did not see plumes during April-23 June. Residents and tourists were warned not to approach the volcano within a radius of 1.5 km. Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)
Concepcion | 24 June-30 June 2015 | New Activity / Unrest Cite this Report
Concepcion Nicaragua	INETER reported that gas explosions continued to be detected at Concepción; by 30 June a total of 2,417 explosions, 113 since 23 June, had been detected by the network since activity increased (date not specified). Source: Instituto Nicaragüense de Estudios Territoriales (INETER)
Hakoneyama | 24 June-30 June 2015 | New Activity / Unrest Cite this Report
Hakoneyama Honshu (Japan)	JMA reported that on 29 June scientists visiting Hakoneyama observed new fumaroles in a landslide-prone area, appearing after a possible landslide had occurred. Fresh sediment deposits within 2 km were possibly caused by the formation of the fumaroles. Seismicity began increasing at 1930, and a 5-minute-period of volcanic tremor began at 1932. At 1230 on 30 June a small-scale eruption occurred. The Alert Level was raised to 3 (on a 5-level scale). Source: Japan Meteorological Agency (JMA)
Raung | 24 June-30 June 2015 | New Activity / Unrest Cite this Report
Raung Eastern Java	PVMBG reported that, during times of clear weather during 1-28 June, white plumes were observed rising as high as 300 m above Raung's crater rim. Rumbling was frequently heard at the observation post. Seismic tremor sharply increased on 21 June, and crater incandescence was observed on 25 and 28 June. BNPB reported that increased activity on 28 June was characterized by Strombolian activity, roaring, ash plumes that rose 300 m, and a loud thumping sound heard 20 km away at 2000. Incandescence from the crater was clearly visible from the observation post in Banyuwangi. PVMBG raised the Alert Level to 3 (on a scale of 1-4) on 29 June, and reminded the public not to approach the crater within a 3-km radius. Sources: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM), Badan Nacional Penanggulangan Bencana (BNPB)
Sinabung | 24 June-30 June 2015 | New Activity / Unrest Cite this Report
Sinabung Northwestern Sumatra	PVMBG reported that foggy weather sometimes prevented visual observations of Sinabung during 22-29 June. White plumes rose as high as 500 m above the crater, and lava flows on the flanks were incandescent as far as 3 km S and SE. Multiple pyroclastic flows per day during 22-26 and 28 June traveled 2.5-4 km down the flanks from the SSE to the SE. One pyroclastic flow was observed on 27 June. Ash plumes rose generally 3.5 km on most days, drifting E, SE, and S, although an ash plume rose as high as 5 km on 25 June. Seismicity consisted of avalanche signals, low-frequency and hybrid events, tremor, tectonic events, and volcanic earthquakes; RSAM values increased due to an increase of avalanche signals. Deformation data showed a trend of inflation. The Alert Level remained at 4 (on a scale of 1-4), indicating that people within 7 km of the volcano on the SSE sector, and within 6 km in the ESE sector, should evacuate. Sources: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM), Badan Nacional Penanggulangan Bencana (BNPB)

Aira | 24 June-30 June 2015 | Continuing ActivityCite this Report
Aira Kyushu (Japan)	JMA reported 26 explosions during 22-29 June from Showa Crater at Aira Caldera’s Sakurajima volcano, some that ejected tephra as far as 1,300 m, and incandescence from the crater that was visible during 22-23 and 27 June. A small-scale eruption occurred from Minami-Dake Crater on 22 June. The Alert Level remained at 3 (on a 5-level scale). Source: Japan Meteorological Agency (JMA)
Colima | 24 June-30 June 2015 | Continuing ActivityCite this Report
Colima Mexico	The Washington VAAC reported that an ash-and-gas plume from an explosion at Colima was recorded by the webcam on 24 June; weather clouds prevented views of the volcano. Source: Washington Volcanic Ash Advisory Center (VAAC)
Dukono | 24 June-30 June 2015 | Continuing ActivityCite this Report
Dukono Halmahera	Based on analyses of satellite imagery and wind data, the Darwin VAAC reported that during 27-28 June ash plumes from Dukono rose to an altitude of 1.8 km (6,000 ft) a.s.l. and drifted 55-75 km NE. Source: Darwin Volcanic Ash Advisory Centre (VAAC)
Fuego | 24 June-30 June 2015 | Continuing ActivityCite this Report
Fuego South-Central Guatemala	In a special report from 28 June at 2100, INSIVUMEH reported that activity at Fuego had been changing during the previous few hours, characterized by 4-5 explosions per hour and ash plumes rising 850 m. During 28-30 June ash plumes drifted W, causing ashfall in areas downwind. Shock waves from the explosions vibrated structures in areas including Panimache and Panimache II (8 km SW), Morelia (9 km SW), Santa Sofía (12 km SW), and Sangre de Cristo (8 km WSW). Block avalanches descended the flanks. Rumbling was audible as far as 25 km away. During 29-30 June a 300-m-long lava flow was visible in the Las Lajas drainage on the SE flank. Source: Instituto Nacional de Sismologia, Vulcanologia, Meteorologia, e Hidrologia (INSIVUMEH)
Karangetang | 24 June-30 June 2015 | Continuing ActivityCite this Report
Karangetang Sangihe Islands	PVMBG reported that on 18 June a lahar in Karangetang’s Batuawang drainage (E) was 25 cm thick, carried boulders, and covered a 100-m section of roadway. The lahar also damaged or destroyed four homes. Based on observations conducted at the Karangetang Volcano Observation Post in the village of Salili, white plumes rose as high as 150 m above the main crater and 25 m above Crater II during 22-29 June. Incandescence from the lava dome was observed at night. Lava flowed from the S part of the dome; incandescent avalanches from the front the lava flow traveled as far as 2.3 km towards Batuawang and Kahetang drainages (E). Seismicity was dominated by signals characteristic of avalanches, and indicated that activity continued to be high. The Alert Level remained at 3 (on a scale of 1-4); visitors and residents were warned not to approach Karangetang within a 4-km radius. Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)
Karymsky | 24 June-30 June 2015 | Continuing ActivityCite this Report
Karymsky Eastern Kamchatka (Russia)	KVERT reported that explosive activity at Karymsky likely continued during 19-26 June; weather clouds obscured views of the volcano. The Aviation Color Code remained at Orange. Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Kilauea | 24 June-30 June 2015 | Continuing ActivityCite this Report
Kilauea Hawaiian Islands (USA)	HVO reported that seismicity beneath Kilauea's summit and upper East Rift Zone was at background levels during 24-30 June. The lava lake continued to be active in the deep pit within the Overlook vent, exhibiting vigorous spattering. The June 27th NE-trending lava flow continued to be active with surface flows within 8 km NE of Pu'u 'O'o. Source: US Geological Survey Hawaiian Volcano Observatory (HVO)
Manam | 24 June-30 June 2015 | Continuing ActivityCite this Report
Manam Northeast of New Guinea	Based on observations of satellite imagery and wind data analyses, the Darwin VAAC reported that during 28-30 June ash plumes from Manam rose to altitudes of 1.8-3 km (6,000-10,000 ft) a.s.l. and drifted as far as 75 km NE. Source: Darwin Volcanic Ash Advisory Centre (VAAC)
Nishinoshima | 24 June-30 June 2015 | Continuing ActivityCite this Report
Nishinoshima Izu Islands	According to NASA's Earth Observatory, a satellite image of Nishinoshima acquired on 21 June showed a sulfur dioxide-and-steam plume rising from the 2.45-square-kilometer island and drifting NE. Hot spots from lava that had emerged from lava tubes were visible on a lava delta at the SE part of the island. Source: NASA Earth Observatory
Sheveluch | 24 June-30 June 2015 | Continuing ActivityCite this Report
Sheveluch Central Kamchatka (Russia)	KVERT reported that during 19-26 June lava-dome extrusion onto Sheveluch’s N flank was accompanied by fumarolic activity. Satellite images showed a thermal anomaly over the volcano during 23-24 June; weather clouds obscured the volcano on the other days. The Aviation Color Code remained at Orange. Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Shishaldin | 24 June-30 June 2015 | Continuing ActivityCite this Report
Shishaldin Fox Islands (USA)	AVO reported that seismicity at Shishaldin continued to be elevated over background levels 24-30 June, indicating that low-level eruptive activity confined to the summit crater likely continued. Elevated surface temperatures were periodically detected in satellite images. Webcam images showed ash deposits around the summit crater rim on 29 and 30 June. The Aviation Color Code remained at Orange and the Volcano Alert Level remained at Watch. Source: US Geological Survey Alaska Volcano Observatory (AVO)
Ubinas | 24 June-30 June 2015 | Continuing ActivityCite this Report
Ubinas Peru	Instituto Geofísico del Perú (IGP) Observatorio Volcanológico del Sur (OVS) reported that during 23-29 June seismic tremor at Ubinas, often associated with emissions, slightly increased compared to the previous week. Ash-and-gas plumes rose as high as 3 km above the crater base, drifting in multiple directions, and four explosions were detected during 24-27 June. Source: Instituto Geofísico del Perú (IGP)
Zhupanovsky | 24 June-30 June 2015 | Continuing ActivityCite this Report
Zhupanovsky Eastern Kamchatka (Russia)	KVERT reported that explosive activity at Zhupanovsky probably continued during 19-26 June; weather clouds obscured views of the volcano. The Aviation Color Code remained at Orange. Source: Kamchatkan Volcanic Eruption Response Team (KVERT)

Weekly Reports Archive

Since the Weekly Volcanic Activity Report began in November 2000, there have been 19,996 individual reports over 1,215 weeks (average of 16 per week) on 332 different volcanoes.

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

 News Feeds and Google Placemarks

 Criteria & Disclaimers

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.

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.

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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)