Activity for the week of 4 June-10 June 2003
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
| Halmahera (Indonesia)
| 1.693°N, 127.894°E
| Elevation 1229 m
The Darwin VAAC reported that an ash plume from Dukono was visible on satellite imagery beginning on 8 June at 1625. The ash plume was at a height of ~4.5 km a.s.l. and drifted NE. As of 10 June a plume was visible extending ~75 km towards the N.
Source: Darwin Volcanic Ash Advisory Centre (VAAC)
| 16.507°S, 168.346°E
| Elevation 1413 m
Based on information from an airport in Vanuatu, the Wellington VAAC reported that a thick ash cloud emitted from Lopevi was observed on 8 June at 1155 rising higher than 12 km a.s.l. and drifting SE. The plume was not visible on satellite imagery. A report from an aircraft revealed that on 9 June at 1011 there was no indication of an ash cloud near Lopevi. That day at 1430 the airport reported that a ~18.5-km-wide, thick black ash cloud was visible rising to ~2.7 km a.s.l. and drifting SE.
Source: Wellington Volcanic Ash Advisory Center (VAAC)
Piton de la Fournaise
| Reunion Island (France)
| 21.244°S, 55.708°E
| Elevation 2632 m
Tremor resumed at Piton de la Fournaise on 2 June, one day after the 30 May eruption ceased. An eruption began midday on 4 June, with lava emitted from the same place as the 30 May eruption and lava fountains rising ~15 m above the ground surface. By 5 June lava had traveled N inside Dolomieu crater, then E reaching ~500 m in length and 300 m in width. Tremor ceased on 8 June, marking the end of the eruption.
Source: Observatoire Volcanologique du Piton de la Fournaise (OVPF)
| Mariana Islands (USA)
| 16.35°N, 145.67°E
| Elevation 790 m
Emissions of ash and gas at Anatahan, which began on 10 May, continued during 4-10 June. The highest reported ash plume rose to ~7.6 km a.s.l. on 3 June at 2013 according to observations from an aircraft. US Geological Survey and Commonwealth of the Northern Mariana Islands Emergency Management Office (EMO) personnel visited Anatahan on 6 June and repaired the seismic station in the east crater. EMO recommended that the state of emergency for Anatahan be extended due to continued volcanism, and that Anatahan residents be permanently relocated.
Sources: Washington Volcanic Ash Advisory Center (VAAC), US Geological Survey Hawaiian Volcano Observatory (HVO), ABC News - Australian Broadcasting Corporation
| Paramushir Island (Russia)
| 50.324°N, 155.461°E
| Elevation 1781 m
The eruption that began at Chikurachki on 18 April continued during 30 May to 6 June, with several explosions occurring. The highest rising ash plume was emitted on 28 May at 0900, rose 4 km above the crater, and drifted NE. An eruption on the afternoon of 29 May sent an ash plume to a height of 1.2 km above the crater and deposited ash on the town of Severo-Kurilsk. Chikurachki remained at Concern Color Code Orange.
Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
| 10.412°N, 123.132°E
| Elevation 2435 m
According to a news article, an ash emission occurred from Canlaon on 8 June during 0645-0700. Small amounts of ash fell in Canlaon City, Barangay Masulog, and Barangay Linutangan. In addition, PHIVOLCS recorded several low-frequency volcanic earthquakes and short-duration harmonic tremor. Moderate steaming occurred, which was above normal levels. The Alert Level at Canlaon remained at 1 (on a scale of 0-5), with a 4-km-radius Permanent Danger Zone.
Source: Sun Star News
| Hawaiian Islands (USA)
| 19.421°N, 155.287°W
| Elevation 1222 m
Small amounts of lava continued to flow into the sea at the Highcastle entry during 4-10 June, and lava flows were sometimes visible on Pulama pali and the coastal flat. Seismicity at the summit of Kilauea continued at moderate-to-high levels, with many small, low-frequency earthquakes occurring at shallow depths beneath the summit caldera for more than a week. The tiny earthquakes occurred at the notably high rate of 2-4 per minute. Little or no volcanic tremor accompanied the swarm, however. Volcanic tremor at Pu`u `O`o remained moderate to high, as is the norm. Almost cyclic inflation and deflation occurred during the report week, but did not culminate in significant overall tilt.
Source: US Geological Survey Hawaiian Volcano Observatory (HVO)
| Central Kamchatka (Russia)
| 56.056°N, 160.642°E
| Elevation 4754 m
During 30 May to 6 June, seismicity remained above background levels at Kliuchevskoi. The amount of spasmodic volcanic tremor continued to grow slowly and consistently. Earthquakes continued to be registered at depths around 30 km and at shallower levels. The character of seismicity indicated that weak gas-and-ash explosions possibly occurred. Kliuchevskoi remained at Concern Color Code Orange.
Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
| 16.72°N, 62.18°W
| Elevation 915 m
Volcanic activity at Soufrière Hills generally declined to moderate-to-low levels during 30 May to 6 June. Most activity was focused on the E and NE flanks of the lava dome, producing rockfalls and numerous pyroclastic flows in the Tar River Valley and occasionally in White's and Tuitt's ghauts. On the morning of 3 June activity briefly increased on the lava dome's NW flank, when numerous rockfalls and three pyroclastic flows entered Tyre's Ghaut. Sulfur-dioxide emission rates in the volcanic plume were moderate, averaging 540 tons per day, which is very similar to the long-term average for the entire eruption. Low-level ash plumes were sometimes visible on satellite imagery.
Sources: Montserrat Volcano Observatory (MVO), Washington Volcanic Ash Advisory Center (VAAC)
| 1.467°S, 78.442°W
| Elevation 5023 m
Volcanic activity increased at Tungurahua around 5 June. On the evening of 6 June Strombolian activity was observed, consisting of incandescent volcanic blocks being hurled ~500 m from the summit. Plumes composed mainly of steam rose to heights around 2 km above the volcano and drifted W. Ash fell in the towns of Pilate, San Juan, and Riobamba, depositing less than 1 mm of ash. According to the Washington VAAC, intense cloud cover prohibited identification of ash plumes on satellite imagery. On the 6th there were reports of ash interfering with main flight routes across Ecuador. IG reported emissions on the 9th reaching 3 km above the volcano and drifting W. On 9 June at 0815 an aircraft reported ash at a height of ~6 km above the volcano. The Alert Level at Tungurahua remained at Yellow in the town of Baños and at Orange for the rest of the population in the high-risk zone, as it has since 5 September 2000.
Sources: Instituto Geofísico-Escuela Politécnica Nacional (IG), Washington Volcanic Ash Advisory Center (VAAC)
News Feeds and Google Placemarks
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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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