All times are local unless otherwise stated.

Izu-Torishima | 3 July-9 July 2013 | New Activity / Unrest Cite this Report
Izu-Torishima Izu Islands	According to the Tokyo VAAC a pilot observed an ash plume from Tori-shima drifting at an altitude of 2.1 km (7,000 ft) a.s.l. on 6 July. Source: Tokyo Volcanic Ash Advisory Center (VAAC)
Popocatepetl | 3 July-9 July 2013 | New Activity / Unrest Cite this Report
Popocatepetl Mexico	CENAPRED reported that on 3 July the seismic network detected 84 emissions from Popocatépetl. Diffuse ash plumes at 0705 and 0825 rose almost 2 km above the crater. Starting at 1742 tremor was accompanied by persistent emissions of gas and ash that rose 3.5 km. Incandescent tephra was ejected short distances onto the N and E flanks. During 3-4 July tremor and 99 emissions were detected, and incandescence from the crater was observed. Steam-and-gas plumes continued to rise above the crater and incandescent tephra was ejected onto the N and E flanks. According to news articles, multiple airlines canceled 47 flights to and from the México City (65 km NW) and Toluca (105 km WNW) airports on 4 July. Flights resumed later that day. Ash fell in areas as far as México City (70 km NW). Gas, steam, and ash plumes drifted NW on 5 July, and almost continuous tremor was recorded. CENAPRED staff, with support of the Ministry of the Navy of México, conducted an overflight and observed continuously ejected incandescent tephra deposited at most 1.5 km away on almost all flanks, and an ash plume that rose 2 km. Cloud cover often obscured visual observations. A news article stated that four airlines canceled a total of 17 flights. On 6 July low-frequency, high-amplitude tremor was accompanied by gas, steam, and ash emissions that rose 2 km and drifted NW. At 1330 the low-frequency tremor amplitude decreased, followed by diminishing emissions of gas and ash which drifted NW. The National Coordination of Civil Protection (CNPC) of the Ministry of Interior (SEGOB), CENAPRED, and Scientific Advisory Committee raised the Alert Level to Yellow, Phase Three. The public was reminded not to approach the crater within a 12-km radius. Later that day gas-and-ash plumes rose 3 km and drifted NW. Three explosions were detected, but cloud cover prevented visual confirmation. News articles noted ash again in parts of México City; ash accumulation was much greater in areas closer to the volcano. During 7-9 July tremor was accompanied by persistent emissions of steam, gas, and small amounts of ash that drifted WSW and NW; cloud cover continued to hinder visual observations. Three explosions increased gas-and-ash emissions. Incandescence and ejected incandescent tephra were sometimes observed. During an overflight on 7 July, scientists observed that a new lava dome, 250 m in diameter, had recently formed in the crater. Explosions on 8 July generated ash plumes that rose 1 km and drifted NW, and explosions on 9 July generated an ash plume that rose 1.5 km and drifted SW. Sources: Centro Nacional de Prevencion de Desastres (CENAPRED), Agence France-Presse (AFP), Associated Press, Stuff
Sheveluch | 3 July-9 July 2013 | New Activity / Unrest Cite this Report
Sheveluch Central Kamchatka (Russia)	Based on visual observations and analyses of satellite data, KVERT reported that during 28 June-5 July a viscous lava flow effused on the N flank of Shiveluch's lava dome, accompanied by hot avalanches, incandescence, and fumarolic activity. Ash plumes as high as 6 km (19,700 ft) a.s.l. were observed during 27-28 June and 3 July. Satellite images detected a daily thermal anomaly, and ash plumes that drifted 35 km SE on 3 July. The Aviation Color Code remained at Orange. Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Suwanosejima | 3 July-9 July 2013 | New Activity / Unrest Cite this Report
Suwanosejima Ryukyu Islands (Japan)	According to the Tokyo VAAC, a pilot observed an ash plume from Suwanose-jima that rose to an altitude of 1.5 km (5,000 ft) a.s.l. Ash was not detected in satellite images. Source: Tokyo Volcanic Ash Advisory Center (VAAC)

Aira | 3 July-9 July 2013 | Continuing ActivityCite this Report
Aira Kyushu (Japan)	JMA reported that two explosions at Sakura-jima's Showa Crater were detected during 5-8 July; cloud cover prevented visual observations of the crater. Crater incandescence was occasionally detected at night. Based on information from JMA, the Tokyo VAAC reported that during 8-9 July explosions generated plumes that rose to altitudes of 1.8-3.7 km (6,000-12,000 ft) a.s.l. and drifted NE, E, and SE. Sources: Japan Meteorological Agency (JMA), Tokyo Volcanic Ash Advisory Center (VAAC)
Chirinkotan | 3 July-9 July 2013 | Continuing ActivityCite this Report
Chirinkotan Kuril Islands (Russia)	Based on analysis of satellite images, SVERT reported that steam-and-gas emissions from Chirinkotan were observed on 3 July and a thermal anomaly was detected on 4 July. The Aviation Color Code remained at Yellow. Source: Sakhalin Volcanic Eruption Response Team (SVERT)
Fuego | 3 July-9 July 2013 | Continuing ActivityCite this Report
Fuego South-Central Guatemala	INSIVUMEH reported that explosions from Fuego during 3-9 July generated ash plumes that rose 100-750 m above the crater and drifted 4-10 km W and NW on most days. During 4-5 and 8-9 July shock waves vibrated structures in areas including Sangre de Cristo (8 km WSW), Panimaché (8 km SW), and Morelia (9 km SW). On 5 July lahars descended the Las Lajas and El Jute drainages (SE), carrying blocks up to 50 cm in diameter. Source: Instituto Nacional de Sismologia, Vulcanologia, Meteorologia, e Hidrologia (INSIVUMEH)
Gamkonora | 3 July-9 July 2013 | Continuing ActivityCite this Report
Gamkonora Halmahera	CVGHM reported that observers at the Gamkonora observation post in Gamsungi (6 km NW), West Halmahera, reported that during 27 May-30 June diffuse white plumes rose up to 300 m above the crater rim. Seismicity declined overall, but a seismic crisis characterized by continuous tremor was detected on 10 June; tremor was not detected during 13-30 June. The Alert Level was lowered to 2 (on a scale of 1-4) on 1 July. Residents and tourists were asked not to venture near the crater within a radius of 1.5 km. Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)
Kilauea | 3 July-9 July 2013 | Continuing ActivityCite this Report
Kilauea Hawaiian Islands (USA)	During 3-9 July HVO reported that the circulating lava lake occasionally rose and fell in the deep pit within Kilauea's Halema'uma'u Crater. The plume from the vent continued to deposit variable amounts of ash, spatter, and Pele's hair onto nearby areas. At Pu'u 'O'o Crater, glow emanated from three spatter cones and a small lava pond on the E part of the crater floor. Branches of the Kahauale’a 2 lava flow, fed by the NE spatter cone, were active as far N as 2.6 km and as far NNW as 1.9 km, and burned forest in both areas. Peace Day activity, fed by lava tubes extending from Pu'u 'O'o, consisted of some breakout activity on the pali and coastal plain, and ocean entries at locations inside and outside the National Park boundary. Source: US Geological Survey Hawaiian Volcano Observatory (HVO)
Kizimen | 3 July-9 July 2013 | Continuing ActivityCite this Report
Kizimen Eastern Kamchatka (Russia)	KVERT reported that during 28 June-5 July moderate seismic activity continued at Kizimen. Video and satellite data showed that lava continued to extrude from the summit, producing incandescence, strong gas-and-steam activity, and hot avalanches on the W and E flanks. A thermal anomaly was detected in satellite images on 28 June, and during 1 and 3-4 July. The Aviation Color Code remained at Orange. Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Tolbachik | 3 July-9 July 2013 | Continuing ActivityCite this Report
Tolbachik Central Kamchatka (Russia)	KVERT reported that the S fissure along the W side of Tolbachinsky Dol, a lava plateau on the SW side of Tolbachik, continued to produce very fluid lava flows during 28 June-5 July that traveled to the W, S, and E sides of the plateau. Cinder cones continued to grow along the S fissure and weak gas-and-steam plumes were observed. A large thermal anomaly on the N part of Tolbachinsky Dol was visible daily in satellite imagery. The Aviation Color Code remained at Orange. Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Veniaminof | 3 July-9 July 2013 | Continuing ActivityCite this Report
Veniaminof Alaska Peninsula, Alaska	AVO reported that the ongoing low-level eruption of Veniaminof, characterized by lava effusion and emission of minor amounts of ash and steam, continued during 3-9 July, indicated by nearly continuous volcanic tremor and occasional small explosions detected by the seismic network. Satellite images showed elevated surface temperatures at the cinder cone inside the caldera consistent with lava effusion most days. Images also showed that most of the lava flows traveled S of the cone a short distance (hundreds of meters). The web camera in Perryville (32 km SSE) recorded very weak emissions of vapor, possibly containing minor amounts of ash, within the caldera for several hours on 9 July. The Volcano Alert Level remained at Watch and the Aviation Color code remained at Orange. Source: US Geological Survey Alaska Volcano Observatory (AVO)
Whakaari/White Island | 3 July-9 July 2013 | Continuing ActivityCite this Report
Whakaari/White Island North Island (New Zealand)	On 9 July GeoNet Data Centre reported that over the previous few weeks very small volcanic earthquakes occurred at White Island approximately every 70 seconds; the hundreds of small bursts created a unique daily pattern on the seismograph. The pattern of the volcanic earthquakes changed over time; the tremor bursts changed in size and frequency and sometimes merged into continuous tremor. Neither increased gas emissions nor changes in the hot lake and recently-erupted lava dome suggested that the process creating the earthquakes, possibly fluid moving through a crack, was occurring at depth. The Volcano Alert Level remained at 1 (on a scale of 0-5) and the Aviation Colour Code remained at Green (on a four-color scale). Source: GeoNet

Weekly Reports Archive

Since the Weekly Volcanic Activity Report began in November 2000, there have been 19,363 individual reports over 1,185 weeks (average of 16 per week) on 331 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)