All times are local unless otherwise stated.

Kuchinoerabujima (Japan) | 30 July-5 August 2014 | New Activity / Unrest Cite this Report
Kuchinoerabujima Ryukyu Volcanic Arc	On 3 August, JMA reported that Kuchinoerabujima erupted in the vicinity of Shin-dake crater and an overflight confirmed traces of ash on the west side of the volcano. Tokyo VAAC reported an ash plume rose to 1.5 km (5,000 ft) a.s.l. and drifted N. JMA raised the Alert Level for Kuchinoerabujima from 2 to 3 (on a scale of 1-5). On 5 August, volcanic seismicity and volcanic tremor decreased and views from a remote web camera showed a white plume 50 m above the crater rim. Sources: Japan Meteorological Agency (JMA), Tokyo Volcanic Ash Advisory Center (VAAC)
Kusatsu-Shiranesan (Japan) | 30 July-5 August 2014 | New Activity / Unrest Cite this Report
Kusatsu-Shiranesan Northeast Japan Volcanic Arc	On 5 August, JMA reported a notable increase of volcanic earthquakes at Kusatsu-Shiranesan’s crater, although tremor was absent. The Alert Level remains at 2 (on a scale of 1-5). Source: Japan Meteorological Agency (JMA)
Tungurahua (Ecuador) | 30 July-5 August 2014 | New Activity / Unrest Cite this Report
Tungurahua Andean Northern Volcanic Arc	During 30 July-5 August IG reported that Tungurahua had moderate and increasing levels of seismicity. On 1-4 August ash plumes rose 1-4 km (3,300-13,100 ft) a.s.l. and drifted N, NW, W, SW, and E. Incandescent blocks ejected 700-1000m above the crater and traveled 500-700m down the flanks of Tungurahua from an explosion on 1 August, followed by 4 small to moderate explosions on 3 August and an explosion 4 August that rattled the observatory. IG reported incandescence within the crater on 2-4 August; observations were supplemented with a thermal camera when the summit was obscured by clouds. Washington VAAC reported ash emissions on 1-5 August that rose 6-8.5 km (20,000-28000 ft) a.s.l. Ashfall was reported in Choglontús, El Manzano, Motilones, Cusúa, Tisaleo, Mocha, Bilbao, Pillate, Chacauco, Pondoa, Sua, Cevallos, Motilones, Quero, Rumipamba, Yanayacu, Pinchicoto, and Tizaleo. Sources: Instituto Geofísico-Escuela Politécnica Nacional (IG-EPN), Washington Volcanic Ash Advisory Center (VAAC)
Ubinas (Peru) | 30 July-5 August 2014 | New Activity / Unrest Cite this Report
Ubinas Andean Central Volcanic Arc	On 31 July and 3-5 August the Buenos Aires VAAC reported continuous emission of light ash from Ubinas. On 30 July INGEMMET reportedsteam-and-gas plumes that rose 500-1100 m above the summit. On 31 July INGEMMET reported an eruption column rose to 3 km (9,800 ft) a.s.l. and drifted NW. On 1 and 3 August gas-and-ash emission rose 200-1200 m above the crater and drifted W. Sources: Buenos Aires Volcanic Ash Advisory Center (VAAC), Instituto Geológico Minero y Metalúrgico (INGEMMET)

Aira (Japan) | 30 July-5 August 2014 | Continuing ActivityCite this Report
Aira Ryukyu Volcanic Arc	JMA reported an explosion from Showa Crater at Aira Caldera’s Sakurajima volcano on 30 July that ejected ballistics 300-500 m from Showa crater and six other explosions on 31 July accompanied by volcanic earthquakes and volcanic tremor. In general, explosions, volcanic tremor and volcanic earthquakes decreased 1-4 August. On 31 July-4 August, incandescence was clearly visible by high-sensitivity camera at night. The Tokyo VAAC reported that a plume from the 30 July explosion rose to an altitude of 1.2 km (4,000 ft) a.s.l. and drifted NW. The Alert Level remained at 3 (on a scale of 1-5). Sources: Japan Meteorological Agency (JMA), Tokyo Volcanic Ash Advisory Center (VAAC)
Fuego (Guatemala) | 30 July-5 August 2014 | Continuing ActivityCite this Report
Fuego Central America Volcanic Arc	During 30 July-5 August, INSIVUMEH reported weak to moderate explosions at Fuego with incandescent blocks expelled 100-200 m above the crater accompanied by minor gray ash 300-400 m above the crater that drifted S. Shock waves from those explosions produced rumbling that rattled structures up to 4 km from the volcano. On most days, weak to moderate avalanches of blocks moved down the flanks towards Taniluya, Ceniza and Santa Teresa canyons. Gray to white plumes rose 4.2-4.6 km (13,800-15,100 ft) a.s.l. and drifted 9-12 km W and SW. Ashfall was reported in villages of Yepocapa, Finca La Conchita, Sangre de Cristo, Morelia and Panimaché. Source: Instituto Nacional de Sismologia, Vulcanologia, Meteorologia, e Hidrologia (INSIVUMEH)
Kilauea (United States) | 30 July-5 August 2014 | Continuing ActivityCite this Report
Kilauea Hawaiian-Emperor Hotspot Volcano Group	During 30 July-5 August HVO reported that the circulating lava lake occasionally rose and fell in the deep pit within Kilauea’s Halema’uma’u Crater. Gas emissions remained elevated. The plume from the vent continued to deposit variable amounts of ash, spatter, and Pele’s hair onto nearby areas; smaller particles may have been deposited several kilometers away. On 30 June the mapped June 27th flow front had reached 4.2 km from vent on northeast flank of Pu’u ‘O’o’. The flow front has continued to advance reaching about 5 km NE of Pu’u ‘O’o’ on 4 August. Two small lava ponds remained active on the south side of Pu’u ‘O’o’s crater. On 30 July-2 August small lava flows were fed by the eastern lava pond. Source: US Geological Survey Hawaiian Volcano Observatory (HVO)
Pacaya (Guatemala) | 30 July-5 August 2014 | Continuing ActivityCite this Report
Pacaya Central America Volcanic Arc	INSIVUMEH reported that during 30 July-5 August, white to light blue fumarolic plumes rose 50 m above Mackenney Crater at Pacaya and drifted up to 600 m W, SW, and S. Source: Instituto Nacional de Sismologia, Vulcanologia, Meteorologia, e Hidrologia (INSIVUMEH)
Reventador (Ecuador) | 30 July-5 August 2014 | Continuing ActivityCite this Report
Reventador Andean Northern Volcanic Arc	IG reported moderate volcanic activity including explosions, long period earthquakes, harmonic tremor, and tremor at Reventador during 30 July-5 August. On most days IG reported inclement weather with intermittent views of steam-and-ash plumes that rose above the crater and drifted W. On 2 August IG noted a steam-and-ash plume rose 2 km above the crater accompanied by seven emission tremor events. On 31 July Washington VAAC reported on-going ash emissions and detected hotspots at the crater. Sources: Instituto Geofísico-Escuela Politécnica Nacional (IG-EPN), Washington Volcanic Ash Advisory Center (VAAC)
San Miguel (El Salvador) | 30 July-5 August 2014 | Continuing ActivityCite this Report
San Miguel Central America Volcanic Arc	SNET reported decreasing seismic activity and reduced emissions at San Miguel during 30 July-5 August. A remote camera and infrared visual display showed minor white fumarolic emissions that rose less than 200 m above the crater. Source: Servicio Nacional de Estudios Territoriales (SNET)
Santa Maria (Guatemala) | 30 July-5 August 2014 | Continuing ActivityCite this Report
Santa Maria Central America Volcanic Arc	On 30 July-5 August INSIVUMEH reported weak fumerolic columns rose to 2.7-2.8 km (8,800-9,100 ft) a.s.l. above Santiaguito. On most days, weak avalanches flowed from the lava flow (2.1 km in length) towards Canyon Nima River I. On 4 August INSIVUMEH reported incandescence at the crater. Source: Instituto Nacional de Sismologia, Vulcanologia, Meteorologia, e Hidrologia (INSIVUMEH)
Sheveluch (Russia) | 30 July-5 August 2014 | Continuing ActivityCite this Report
Sheveluch Eastern Kamchatka Volcanic Arc	KVERT reported that during 25 July-1 August lava-dome extrusion onto Shiveluch’s SE flank was accompanied by moderate ash explosions, incandescence of the dome summit, hot avalanches, and fumarolic activity. Satellite images were obscured by clouds over the past week. The Aviation Color Code remained at Orange. Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Shishaldin (United States) | 30 July-5 August 2014 | Continuing ActivityCite this Report
Shishaldin Aleutian Ridge Volcanic Arc	AVO reported that during 30 July-5 August low-level eruptive activity continued at Shishaldin volcano. Elevated surface temperatures at the summit were detected from satellite data most days except for cloudy conditions 4-5 August. Steaming from the summit crater was visible in web cam images 30 July-1 August and 5 August. The Aviation Color Code remained at Orange and the Volcano Alert Level remained at Watch. Source: US Geological Survey Alaska Volcano Observatory (AVO)
Zhupanovsky (Russia) | 30 July-5 August 2014 | Continuing ActivityCite this Report
Zhupanovsky Eastern Kamchatka Volcanic Arc	KVERT reported that during 25 July-1 August the moderate explosive eruption continues at Zhupanovsky. On 27 July, satellite data showed ash plumes rose to 4 km (13,100 ft) a.s.l. and extended 150 km N. The volcano was obscured by clouds 25 July-1 August. On 30 July Tokyo VAAC reported an ash plume rose 5.2 km (17,000 ft) a.s.l. and drifted W. Sources: Kamchatkan Volcanic Eruption Response Team (KVERT), Tokyo Volcanic Ash Advisory Center (VAAC)

Weekly Reports Archive

Since the Weekly Volcanic Activity Report began in November 2000, there have been 20,322 individual reports over 1,229 weeks (average of 17 per week) on 336 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.

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)