Activity for the week of 13 June-19 June 2001
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
| 16.507°S, 168.346°E
| Elevation 1413 m
Based on a pilot report, the Wellington VAAC issued an ash advisory stating that at 0302 on 14 June a small eruption produced an ash cloud that rose up to ~1.8 km a.s.l. The cloud expanded towards the N over the islands of Paama and Ambrym.
Source: Wellington Volcanic Ash Advisory Center (VAAC)
Piton de la Fournaise
| Reunion Island (France)
| 21.244°S, 55.708°E
| Elevation 2632 m
Tremor associated with an eruption that began on 11 June had weakened by 16 June. The same day a fissure located on the E flank at the S base of crater Signal de l'Enclos at 1,800 m altitude was intensely active. In an area near the active fissure a cone began to form and lava fountains rose up to 30 m above the surface.
Sources: Observatoire Volcanologique du Piton de la Fournaise (OVPF), Observatoire Volcanologique du Piton de la Fournaise (OVPF)
| Sicily (Italy)
| 37.748°N, 14.999°E
| Elevation 3320 m
The Italy's Volcanoes website reported that on 13 June, after ~44 hours of low activity, the fourth eruptive episode within in a week began at Southeast Crater. The episode lasted longer and was more intense than the previous three episodes. Lava flowed from a vent on the NNE flank of Southeast Crater cone. During the most intense phase of the eruption lava fountains rose 150-200 m above the NNE flank vent. Strombolian bursts occurred so frequently that they eventually blended into one continuous pulsating fountain that rose up to 400 m. Also bursts periodically sent bombs up to 500 m above the crater rim. A small amount of ash was emitted with many of the stronger bursts. On 15 June another eruptive episode occurred with activity similar to the 13 June episode.
Source: Italy's Volcanoes
| Hawaiian Islands (USA)
| 19.421°N, 155.287°W
| Elevation 1222 m
Small surface pahoehoe lava flows were visible on the W end of the flow field. Lava entered the sea at the E Kupapa`u ocean entry. Generally, weak, steady tremor and related long-period earthquakes continued beneath Kilauea's caldera. On 18 June for several hours there was a slight increase in long-period earthquakes near the caldera. Tremor remained weak to moderate near Pu`u `O`o and seismicity was at normal levels elsewhere. Tiltmeters in the summit area and along the east rift zone indicated no significant deformation.
Source: US Geological Survey Hawaiian Volcano Observatory (HVO)
| Luzon (Philippines)
| 13.257°N, 123.685°E
| Elevation 2462 m
A high level of high-frequency low-duration harmonic tremor was detected on Mayon that was associated with near-continuous detachment of hot rock fragments from the summit lava dome. In addition, moderate amounts of steam emanated from the crater, crater glow was fair-to-bright, and SO2 emission (average of ~2,700 metric tons per day) was well above the baseline value of 500 metric tons per day. Alert Level 3 remained in effect, prohibiting entry within the 6-km-radius permanent danger zone.
Sources: Philippine Institute of Volcanology and Seismology (PHIVOLCS), The Philippine Star
| 19.023°N, 98.622°W
| Elevation 5393 m
Volcanic activity at Popocatépetl remained at normal levels, with several small exhalations of steam, gas, and small amounts of ash. The volcano remained at Alert Level Yellow Phase III, with a restricted 12-km-radius area.
Source: Centro Nacional de Prevencion de Desastres (CENAPRED)
| Central Kamchatka (Russia)
| 56.653°N, 161.36°E
| Elevation 3283 m
During 8-14 June seismic activity was above background level at Shiveluch. Many small earthquakes occurred within the volcano's edifice and local seismic signals accompanied explosions, avalanches, and collapses. There were several ash-and-gas eruptions, with the highest eruption cloud reaching up to 2 km above the lava dome. A thermal anomaly was observed on satellite imagery on 8,9, and 10 June. The level of Concern Color Code remained at Yellow.
Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
| 16.72°N, 62.18°W
| Elevation 915 m
From 12 June to at least 15 June volcanic activity increased at Soufrière Hills in comparison to the previous week. There was a larger number of rockfalls, and hybrid and long-period earthquakes. Sulfur dioxide flux markedly increased (770 metric tons on 11 June and 1410 metric tons on 14 June). New growth was substantial in the southern sector of the lava dome and there was a large accumulation of new dome material SW of the dome in the upper reaches of the White River. The daytime entry zone was open for limited periods during the week. The Washington VAAC reported that at 0510 on 14 June a small ash cloud rose 3-4.5 km a.s.l. and drifted to the W and that low-level ash was emitted throughout the week. In addition, moderate rockfall activity produced ash to ~2 km a.s.l. and a hot spot was occasionally visible on satellite imagery.
Sources: Montserrat Volcano Observatory (MVO), Washington Volcanic Ash Advisory Center (VAAC)
| 1.467°S, 78.442°W
| Elevation 5023 m
Several small eruptions produced ash clouds that rose to a maximum height of ~9.7 km. The IG reported that the number of long-period earthquakes and the emission of gas and ash had increased since the end of April. They warned that heavy rain could remobilize ash on the flanks of the volcano, generating dangerous lahars.
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.