Activity for the week of 14 June-20 June 2006
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 at volcanoes that meet criteria discussed in detail in the "Criteria and Disclaimers" section. Carefully reviewed, detailed reports on various volcanoes are published monthly in the Bulletin of the Global Volcanism Network.
New Activity / Unrest
| Luzon (Philippines)
| 12.769°N, 124.056°E
| Elevation 1535 m
An explosion from a fissure W of the summit vent of Bulusan lasting approximately 13 minutes on 13 June produced an ash-and-steam cloud that reached a height of 1.5 km above the summit (10,100 ft a.s.l.) and drifted NW. Ashfall up to 7 mm thick accumulated in neighborhoods in the municipality of Juban. On 18 June, an ash producing explosion that lasted approximately 11 minutes produced an ash-and-steam cloud that also reached a height of 1.5 km above the summit (10,100 ft a.s.l.) and drifted W. Ash up to 5 mm thick fell on a W flank village. On 20 June, a mild ash-and-steam explosion lasted approximately 17 minutes. Close to 900 people were evacuated due to the 18 June activity. On 20 June, officials declared a state of disaster for Irosin, Casiguran, and Juban towns in Sorsogon province. Bulusan remained at Alert Level 2 (out of 5 levels) during 14-20 June.
Sources: Philippine Institute of Volcanology and Seismology (PHIVOLCS), Reuters, Canada.com (Postmedia Network), Philippine Information Agency
| Kyushu (Japan)
| 31.593°N, 130.657°E
| Elevation 1117 m
Based on information from JMA and pilot reports, the Tokyo VAAC reported that ash plumes from Sakura-jima reached altitudes of 2.1 km (7,000 ft) a.s.l. during 14, 16, and 19 June.
Source: Tokyo Volcanic Ash Advisory Center (VAAC)
| Bougainville (Papua New Guinea)
| 6.137°S, 155.196°E
| Elevation 1855 m
An ash-and-steam plume from Bagana was visible on satellite imagery on 18 June drifting SW. The height of the plume was not reported.
Source: Darwin Volcanic Ash Advisory Centre (VAAC)
| 1.22°N, 77.37°W
| Elevation 4276 m
INGEOMINAS reported that during 12-19 June, the number of pulsating ash emissions at Galeras decreased from the 5-12 June reporting period. Ash columns reached heights of 1.4 km above the summit (18,600 ft a.s.l.) on 12 June and 0.6 km above the summit (16,000 ft a.s.l.) on 15 June. Galeras remained at Alert Level 2 (likely eruption in days or weeks).
Source: Servicio Geológico Colombiano (SGC)
| 10.412°N, 123.132°E
| Elevation 2435 m
Minor steam-and-ash emissions that were observed from Canlaon during 13-15 June reached heights of 2 km above the summit (14,600 ft a.s.l.) and drifted primarily NE and NW. Light ashfall was observed on the volcano's upper N flanks and reached approximately 10 km E in Canlaon City. The alert status remained at Level 1, which restricted activity within 4 km of the summit.
Source: Philippine Institute of Volcanology and Seismology (PHIVOLCS)
| Eastern Kamchatka (Russia)
| 54.049°N, 159.443°E
| Elevation 1513 m
Activity at Karymsky continued during 10-16 June, with 400-600 shallow earthquakes occurring daily. Ash plumes up to 5 km (16,400 ft) a.s.l. traveling SE were observed by pilots. A large thermal anomaly over the crater was visible on satellite imagery. Karymsky remained at Concern Color Code Orange.
Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
| Hawaiian Islands (USA)
| 19.421°N, 155.287°W
| Elevation 1222 m
During 14-20 June, lava from Kilauea continued to flow off of a lava delta into the ocean at the East Lae`apuki entry. Incandescence was visible from Drainhole vent in Pu`u `O`o's crater during the reporting period. Tremor remained at a very typical moderate level at Pu`u `O`o.
Source: US Geological Survey Hawaiian Volcano Observatory (HVO)
| Central Java (Indonesia)
| 7.54°S, 110.446°E
| Elevation 2910 m
Gas plumes were emitted from Merapi on 14 and 15 June and reached a maximum height of 900 m above the summit (12,500 ft a.s.l.). On 14 June, a dome-collapse event, lasting approximately 3.5 hours, produced pyroclastic flows that reached a maximum distance of 7 km SE along the Gendol River. Two people assisting with evacuation efforts were trapped an underground shelter in Kaliadem village and died, the first fatalities of the current eruption. On 15 June, pyroclastic flows reached a maximum distance of 4.5 km SE along the Gendol River. According to news reports, pyroclastic flows continued during 16-19 June as a new dome grew. On 19 June, water shortages were reported. The Alert Level remained at 4, the highest level.
Sources: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM), Deutsche Presse-Agentur, The Jakarta Post, Reuters, Associated Press
| Eastern Java (Indonesia)
| 8.108°S, 112.922°E
| Elevation 3657 m
According to the Darwin VAAC, a pilot reported that ash plumes from Semeru on 14 June reached altitudes of 6.1 km (20,000 ft) a.s.l. Small ash plumes were detected on satellite imagery on 15, 17, and 18 June.
Source: Darwin Volcanic Ash Advisory Centre (VAAC)
| 16.72°N, 62.18°W
| Elevation 915 m
During 9-16 June, the Soufrière Hills lava dome continued to grow, but at a slower rate than during the 2-9 June reporting period. Vigorous ash-and-gas venting occurred from a vent to the N of the lava dome.
Source: Montserrat Volcano Observatory (MVO)
| United States
| 46.2°N, 122.18°W
| Elevation 2549 m
During 14-19 June, the lava dome at Mount St. Helens continued to grow and produce small rockfalls. According to seismic data, a medium-sized rockfall occurred on 13 June. Incandescence was observed on satellite imagery. The volcano remained at Volcano Advisory (Alert Level 2); aviation color code Orange.
Source: US Geological Survey Cascades Volcano Observatory (CVO)
| North Island (New Zealand)
| 39.157°S, 175.632°E
| Elevation 1978 m
According to GeoNet on 14 June, seismic activity at Ngauruhoe (the youngest cone of the Tongariro complex) remained elevated. The Alert Level remained at 1.
| 1.467°S, 78.442°W
| Elevation 5023 m
Explosions and seismic activity at Tungurahua were at moderate levels during 14-20 June. Steam columns with low-to-moderate ash content reached heights of 1.5 km above the summit (21,400 ft a.s.l.) on 14-15 and 17 June and drifted W. On 16 June, ash fell in the towns of Pillate and Bilbao.
Sources: Instituto Geofísico-Escuela Politécnica Nacional (IG), Washington Volcanic Ash Advisory Center (VAAC)
News Feeds and Google Placemarks
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. 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.
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.
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 page for that volcano and to the complete Weekly Report for that week.
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 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.
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RSS and CAP Feeds
An RSS (Really Simple Syndication) feed for the Weekly Volcanic Activity Report first made available on 5 March 2008 can be utilized with the aid of various free downloadable readers. The report content of the news 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. 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. On 12 March 2009, GeoRSS tags were added so that the latitude and longitude for each volcano could be included with the feed.
At the end of each individual report is a list of the sources used. We would like to emphasize that the World Organization of Volcano Observatories (WOVO) website (http://www.wovo.org/) lists the regional volcano observatories that have the most authoritative data for many of these events.
CAP (Common Alerting Protocol) feeds are XML files specifically formatted for disaster management.
Google Earth Placemarks
A Google Earth network link for the Weekly Volcanic Activity Report was first made available on 1 April 2009. This file 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 page for that volcano and to the complete Weekly Report for that week.