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| Notable volcanic activity: NOAA Operational Significant Imagery records eruption at Soufriere Hills Volcano on Montserrat Island in the Carribean Sea. |
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Hot spots can be seen with MODIS. 
From the Global Volcanism Program — Department of Mineral Sciences — National Museum of Natural History — Smithsonian Institution. During 20-27 October, lava-dome growth at Soufrière Hills continued and was concentrated on the NE part of the edifice. Rockfalls and small pyroclastic flows originating from the active lobe traveled down the NE flank. Several small stubby spine-like structures were observed on the SE summit region of the dome. Based on information from the MVO, satellite imagery, and the Piarco MWO, the Washington VAAC reported that continuous ash and gas emissions during 25-31 October produced plumes that drifted NW and W. Plumes reached altitudes of 2.1 km (7,000 ft) a.s.l. A hotspot was detected on satellite imagery during 25-27 October and 29 October. SOUFRIÈRE HILLS Montserrat, West Indies |
| Notable volcanic activity: NOAA Operational Significant Imagery records eruption at the Cleveland Volcano in Alaska. |
Saturday 28th October 2006 From the AVO Information Release of Saturday, October 28, 2006, 6:00 PM AKDT: "AVO received a pilot report of an eruption of Mount Cleveland volcano at approximately 0000 UTC (1600 AKDT) today. Satellite data confirmed the presence of a drifting ash cloud moving ENE of the volcano. Based on satellite data, we estimate the height of the cloud to be 20,000 ft. above sea level, though one pilot report had it in excess of 30,000 ft. The eruption started at approximately 2345 UTC (1545 AKDT) and ended shortly thereafter. |
| Notable volcanic activity: Moderate Resolution Imaging Spectroradiometer (MODIS) records hot spot at the Volcano Soufriere Hills. |
Sunday 1st October 2006 Dome growth is continuing at Soufriere Hills volcano on Montserrat. Pyroclastic flows have been reported over the past week. Ash plume is visible on satellite images up to 250 km from the volcano. John Seach |
| Notable volcanic activity: Moderate Resolution Imaging Spectroradiometer (MODIS) records no hot spot at the Paos Volcano |
September 25, 2006, at 9:48 pm (03:48 GMT sept 29) Poas Volcano produced one minor phreatic eruption. One specific seismic event was registered at OVSICORI, changing the previous pattern to a stronger, tremor-like signal. Reports from workers near the summit associated such event with a sound rumbling, although nobody witnessed it. A fine spray of sediments was reported several kms W of the summit. No harm to communities, agriculture or animals has been reported. The phreatic event ejected coarser, wet material, from the bottom of the lake, impregnating the W vertical walls of the acidic lake. Finer material was deposited gradually from the summit to the non vegetated area around it. Such eruptions are common to this volcano and they have occurred several times in the last 30 years. E.g. late 70s, 89, 90, 94 and more recently in april 06. Based on a fieldtrip by staff from OVSICORI, seismic information analysis and historical records we can conclude that this event was one of the typical sporadic phreatic events. Hence they can not be discarded to ocurr in the future. Observatorio Vulcanológico y Sismológico de Costa Rica |
| Notable volcanic activity: Moderate Resolution Imaging Spectroradiometer (MODIS) records hot spot at the SOUFRIÈRE HILLS Montserrat, West Indies on September 1, 2006. |
Wed, 06 Sep 2006 14:36:32 -0700 Based on satellite imagery and reports from the MVO, the Washington VAAC reported that the Soufrière Hills lava dome collapsed at 1740 on 29 August. Ash venting was seen on satellite imagery prior to the collapse at 0615 and 1245. The plumes reached altitudes of 2.4 km (8,000 ft) a.s.l., drifted N, and then shifted to the W and SW. According to the Antigua Aircraft Tower, the dome collapse produced a plume that rose to an altitude of about 9 km (30,000 ft) a.s.l. The upper portion of the cloud drifted E and the lower portion possibly drifted N and W. Pyroclastic flows reached the sea down the Tar River Valley. On 30 August, small pyroclastic flows were visible on the NE and S flanks of the lava dome. On 31 August, two vigorous ash-and-steam vents opened on the W and N flanks accompanied by tremor. A pilot reported an ash plume at an altitude of 4.6 km (15,000 ft) a.s.l. drifting W. The Alert Level was raised to 4 (on a scale of 0-5). The Washington VAAC reported continuous gas and ash emissions during 1-4 September; plumes reached altitudes of 3 km (10,000 ft) a.s.l. and drifted W. |
| Notable volcanic activity: Moderate Resolution Imaging Spectroradiometer (MODIS) records hot spot at the Piton de la Fournaise Reunion Island in Indonesia on August 31, 2006. |
August 31, 2006 only two weeks after the end of the July eruption, Piton de la Fournaise volcano started a new eruption on August 30, 11:35 local time. A very soft "seismic crisis" of about 10 small events occurred at 10:00 in the morning. At 11:35 eruption tremor appeared very slowly and without any further seismicity and a summit eruption started on the south-east-south edge of Dolomieu crater. Scientists of the Reunion University which were on the summit could observe the beginning eruption. Two fissures opened, the first one within Dolomieu crater is very active and a large part of the crater floor was already covered by a lava flow in the afternoon. The second fissure one just outside of Dolomieu crater produced a lava flow on the east flank of Piton de la Fournaise, but ceased its activity in the afternoon. At present eruption tremor is still at a quite high level and a new eruption cone is forming within Dolomieu crater. Thomas Staudacher Observatoire volcanologique du Piton de la Fournaise |
| Notable volcanic activity: Moderate Resolution Imaging Spectroradiometer (MODIS) records hot spot at the Mayon Volcano in Indonesia on August 28, 2006. |
Mayon on ‘very high level of unrest’ By MADEL R. SABATER The Philippine Institute of Volcanology and Seismology (Phivolcs) maintained Mayon Volcano’s alert status at Level 4 as it continued to indicate a high level of unrest, including the brief ejection of ash and steam yesterday morning. Aside from exhibiting a high record of seismic activity and gas output (30 volcanic earthquakes, 275 tremor episodes and a sulfur dioxide flux of 4,640 tonnes per day) yesterday, Mayon also produced an "ash puff," which occurred at 6:25 a.m. yesterday. It rose to about 100 meters. "Some rumbling at around 8:47 p.m. Sunday (Aug. 27) were reported by residents of Barangays Matanag and Ligñon Hill Observatory in Legazpi City, and of Basud in Sto. Domingo. These sounds were also coincident during a period of some volcanic earthquakes," Phivolcs added. The institute also said the restive volcano "continued to extrude" lava from its crater. The lava flow from Mayon’s summit crater had been observed to descend in slow motion after it had gone beyond the six kilometer (km) permanent danger zone early during the month. However, lava extrusion was again observed to have become "more vigorous" since last Wednesday night (Aug. 23), which showed that "Mayon’s mild eruptive activity, in general, is continuing." Last week, a lull in ash explosion had been observed by seismologists in Mayon volcano. From the record of at least one ash explosion a day, no ash explosion had been recorded from Aug. 20 to 21 and from Aug. 23 until yesterday. It was only during the 24-hour observation period last Aug. 22 when six minor explosions had been recorded by the institute from 6:08 p.m. of Aug. 21 to 2:38 a.m. of Aug. 22. However, the gas output and seismic activity continued to remain high, indicating that Mayon is still on a "very high level of unrest." Seismologists however said that despite a lull in ash explosion, the public is still prohibited from venturing inside the eight-kilometer (km) extended danger zone (EDZ) in the southeast or the Bonga gully, where the crater rim is lowest, and at seven kms for other areas around the volcano. Copyright © 2001-2005, Manila Bulletin. All Rights Reserved. |
| Notable volcanic activity: Moderate Resolution Imaging Spectroradiometer (MODIS) records hot spot at the Tungurahua Volcano in Ecuador on August 17, 2006. |
QUITO, Ecuador - Thousands of Ecuadorean villagers have fled their homes on the slopes of the Tungurahua volcano since it began erupting lava and toxic gases, authorities said Saturday. No injuries have been reported, but some 3,700 people have abandoned their homes in half a dozen hamlets since Friday, the Civil Defense said. "There have been no victims, but all the vegetation has died and we have lost cattle," said Juan Salazar, mayor of Penipe County, which includes two villages where 300 families have been forced to evacuate. In May, the volcano, located 85 miles south of the capital of Quito, began emitting its loudest and most frequent explosions since it rumbled back to life nearly seven years ago after being inactive for eight decades. On Friday, the Geophysics Institute reported that the 16,550-foot-high volcano had changed its behavior drastically by expelling at least four lava flows - the first since activity resumed. Hugo Yepes, director of the institute, said the wind was carrying ash from the explosions up to 75 miles west of the volcano. On Saturday, the institute said the explosions had lessened in frequency to every half an hour, from every five minutes on Friday. Banos, a city of 20,000 people at the foot of the volcano, appeared to be out of danger because it is on the eastern side. © Ecuador News (August 17, 2006) |
| Notable volcanic activity: Moderate Resolution Imaging Spectroradiometer (MODIS) records hot spot at the Kilauea Volcano in Hawaii on August 6, 2006. |
A 5-10 acre coastal collapse has occurred at Kilauea volcano in Hawaii. The collapse happened at 12:47 pm on 30th July on the west side of the East Lae'apuki lava bench. This represents less than 15% of the bench size. Explosions created by lava-seawater interaction sent lava fragments 130 ft inland towards an area roped off for tourists. The collapse lasted for a period of minutes and occurred without warning. Last November a 44-acre section of the bench collapsed in the same area, about two miles from the end of Chain of Craters Road. John Seach |
| Notable volcanic activity: Moderate Resolution Imaging Spectroradiometer (MODIS) records hot spot at the Mayon Volcano in Indonesia on August 3, 2006. |
Lava has extended beyond the 6 km exclusion zone at Mayon volcano in Philippines. Danger signs have been placed 7 km from the volcano to prevent tourists and locals from venturing closer to the lava on the SE side of the volcano. Mayon volcano is capable of producing pyroclastic flows as well as the current effusive eruption of lava. John Seach |
| Notable volcanic activity: Moderate Resolution Imaging Spectroradiometer (MODIS) records hot spot at the Karangetang Api Siau Volcano in Indonesia on July 26, 2006. |
Karangetang volcano in Indonesia has been placed on maximum level 4 alert since 22nd July. Visual observations were not possible today due to fog, but seismometers are recording volcanic tremor. Villagers close to the volcano have been warned about the possibility of pyroclastic flows, and advised to stay away from the crater. The regional government is preparing to evacuate residents. Rain will create mudflow hazards at the volcano. The Directorate of Volcanology and Geological Hazard Mitigation in Indonesia says a large eruption is possible. In April 2006 a magnitude 6 earthquake hit Karangetang volcano. John Seach |
| Notable volcanic activity: Moderate Resolution Imaging Spectroradiometer (MODIS) records hot spot in the Wabash Seismic Zone on July 24, 2006. |
Piton de la Fournaise volcano in Reunion has erupted. Seismicity gradually increased since April accompanied by inflation of the summit. Earthquakes reached 80 per day on 2nd July. After a sudden decrease in activity at the volcano on Monday July 17, Piton of the Furnace erupted in middle of the night on Thursday July 20 at 02:18 hr. This is the first eruption at the volcano in 2006. Weather is currently unfavourable for observation at the volcano with rain, 60 km/hr winds and temperatures below 12 deg C. John Seach |
| Notable volcanic activity: Moderate Resolution Imaging Spectroradiometer (MODIS) records three hot spots in the Midwest on July 20, 2006. |
A large shallow earthquake (mag 6.2) has hit 30 km west of Karai volcano in Papua New Guinea on Wednesday 19 July at 9:48 pm (local time). This was followed 6 hours later by a magnitude 5.7 earthquake north west of the volcano. West New Britain Province east of Kimbe has been subjected to high seismicity since the first recorded eruption of Karai volcano ten days ago. John Seach |
| Notable volcanic activity: Moderate Resolution Imaging Spectroradiometer (MODIS) records no hot spots near Denali National Park in Alaska. |
A large earthquake (magnitude 6.0) occurred 50 km SE of Krakatau volcano on Wednesday 19 July at 5:57pm (local time). The earthquake was felt in Jakarta, the capital of Indonesia. John Seach |
| Notable volcanic activity: Moderate Resolution Imaging Spectroradiometer (MODIS) records hot spots at Mt. Etna near Sicily at 2006 07 16 20 45 |
Activity resumed at Mt Etna on 15th July. A fracture opened at the base of SE crater accompanied by lava flows at 3050 m and 3000 m elevation. The lava flows towards Valle del Bove. No seismicity preceded the eruption. A small cone is forming at the source with degassing and small jets of lava and old rocks. The following day there were Strombolian eruptions from the cone at 3050 m with lava ejected to a height of 100 m. The lava is flowing at a rate of 0.5 m per hour. John Seach |
| Notable volcanic activity: Moderate Resolution Imaging Spectroradiometer records hot spot at Mt. Erebus near Antarctica (MODIS) at 2006 07 14 20 45 |
When a hot-spot is found the date, time, location, and intensity of the hot-spot are recorded. MODIS looks at every square kilometre of the Earth's surface every 48 hours, once during the day and once during the night, and the presence of two MODIS sensors in space allows us to provide at least 4 hot-spot observations every two days. |
| Notable volcanic activity: INFORMATION SOURCE: MTSAT, AVHRR IMAGERY AVIATION COLOUR CODE: ORANGE |
OBS ASH DATE/TIME: 14/0830Z OBS ASH CLOUD: ASH NOT IDENTIFIABLE FROM SATELLITE DATA |
| Notable volcanic activity: VOLCANO: Sulu Range 0502-09= LOCATION: S0530 E15056 RVO have advised that they are deploying monitoring equipment. Sat imagery indicates no ash cloud but we will continue monitoring. Reallocated volcano number based on Smithsonian adv |
ERUPTION DETAILS: High seismic activity. OBS ASH DATE/TIME: 13/0400Z An eruption has occurred at Bamus volcano in Papua New Guinea. Forceful white-grey emissions to the south and southeast were reported between 1110 and 1210 hr (local time) on 12th July 2006. Multiple reports from ground observers have confirmed the emissions. This is the first eruption at the volcano in 120 years. This follows the first historically recorded eruption of nearby Karai volcano two days ago. John Seach |
| Notable volcanic activity: Monday 10th July 2006 An eruption has been reported at Karai volcano in Papua New Guinea. Forceful emissions reached 18,000 ft altitude today at 1545 hr (local time). This is the first recorded eruption at the volcano. |
REMARKS: KARAI IS LARGEST CONE OF HISTORICALLY INACTIVE SULU RANGE. Karai Volcano (Papua New Guinea) 5.47 S, 150.95 E, summit elevation 500 m, volcano type unknown John Seach |
| Notable volcanic activity: Based on a pilot report, the Darwin VAAC reported that an ash cloud from Batu Tara reached an altitude of 1.5 km (5,000 ft) a.s.l. and drifted NW. Ash was not identified on satellite imagery. |
Geologic Summary. The small isolated island of Batu Tara in the Flores Sea about 50 km north of Lomblen Island contains a scarp on the eastern side similar to the Sciara del Fuoco of Italy's Stromboli volcano. Vegetation covers the flanks of Batu Tara to within 50 m of the 748-m-high summit. Batu Tara lies north of the main volcanic arc and is noted for its potassic leucite-bearing basanitic and tephritic rocks. The only known historical eruption from Batu Tara, during 1847-52, produced explosions and a lava flow. |
| Notable volcanic activity: Lopevi Volcano (Vanuatu) Wednesday 5th July 2006 Eruptions continue at Lopevi volcano in Vanuatu. A report from a pilot indicated an ash cloud reached 20,000 ft at 1148 hr local time today. Satellite images show multiple hotspots at the volcano. Lopevi volcano has been showing higher than normal activity since November 2005. During a field trip to the volcano in March John Seach observed lava flows descending the western flank of the volcano. |
Cross-section of upper mantle and crust beneath Lopevi, northern Vanuatu volcanic arc. The eastward-moving Australian Plate, here made of oceanic crust and upper mantle, is subducted beneath the westward-moving Pacific Plate. Lopevi is on the Pacific Plate. The lack of earthquakes between 50 and 200 km depth suggests that the subducted plate has broken into two pieces. Magma is generated at a greater depth, relative to the southern Vanuatu volcanic arc. Rocks melt where the mantle in the asthenosphere is modified by fluids leaving the subducted plate. Compare to the tectonic setting of Lopevi, northern Vanuatu volcanic arc. Arrows show direction of flowing rocks in the asthenospheric mantle. From Monzier and others (1997). |
| Notable volcanic activity: Cleveland Volcano erupted on May 23,2006 in a short-lived spurt that lasted only two hours. NASA astronaut and Expedition 13 science officer/flight engineer Jeffrey Williams on board the ISS grabbed a camera and caught this magnificent image. Source: North Dakota Space Grant Consortium (July 7, 2006) |
Mt. Cleveland is a 5,675-foot-tall (1,730 m) stratovolcano on the west side of Chuginadak Island. Chuginadak volcano and an unnamed volcano form the east side of the island. Mt. Cleveland is almost perfectly symmetrical and 5 miles (8 km) wide at its base. It is also one of the most active volcanoes in the Aleutians. While a small number of soldiers were stationed on the island, one was killed during an eruption in June of 1944. A brief eruption in May of 1994 sent ash to 10.5 km. |