Several ash-cloud producing explosions occurred at Tungurahua during 25 June to 1 July. On 25 June ash fell in the sector of Pillate and in the town of Mocha. According to the Washington VAAC, ash was visible on satellite imagery during the report week, with the highest rising ash cloud reaching ~9.4 km a.s.l. on 27 June.
Based on information from an aircraft report, the Darwin VAAC reported that an ash plume from Leroboleng rose to ~1.8 km a.s.l. on 26 June. Ash was not visible on satellite imagery. Leroboleng has not erupted since the 19th century, and results from ground observations are pending.
Wed, 25 Jun 2003, 06:00
Volcanic and seismic activity at Soufrière Hills remained at low levels during 20-26 June, but increased on 27 June. There were no apparent changes at the summit region since it was last observed several weeks previously. During 20-25 June, rockfalls and sporadic pyroclastic flows occurred on the lava dome's E and N flanks and traveled into the Tar River Valley, and White's, Tuitt's, and Tyre's ghauts.
Read allWed, 25 Jun 2003, 06:00
There was a noticeable decline in ash eruptions from Rabaul caldera's Tavurvur cone on 22 June through at least 30 June. Around the 19th, ash plumes drifted NW, depositing ash in Rabaul Town and nearby villages. On 19 and 21 June ash emissions occurred within several minutes of each other, but on the 22nd the interval became much longer with no ash emissions occuring for as long as an hour.
Read allWed, 25 Jun 2003, 06:00
During 25 June to 1 July, moderate emissions of mainly gas, steam, and sometimes ash, occurred at Popocatépetl. On 28 June the number of emissions was higher than on other days, and the plumes had a higher ash content. Ash fell in towns SW of the volcano.
Read allWed, 25 Jun 2003, 06:00
After ceasing for a few days, eruptive activity recommenced at Piton de la Fournaise on 21 June around 2330. Tremor was sometimes recorded at Dolomieu crater and lava flows were emitted from the crater. Volcanism continued through at least 28 June.
Read allWed, 25 Jun 2003, 06:00
Seismicity was above background levels at Kliuchevskoi during 20-27 June, with earthquakes occurring at depths around 30 km and at shallower levels. The character of seismicity indicated that weak gas-and-ash explosions possibly occurred. Spasmodic tremor was recorded the entire week.
Read allWed, 25 Jun 2003, 06:00
During 25-30 June at Kilauea, surface lava flows were occasionally visible on the coastal flat and upslope on the Pulama pali fault scarp, but diminished by 29 June. Seismicity continued at moderate levels at Kilauea's summit, with many small low-frequency earthquakes continuing at shallow depths at a rate of about 1-2 per minute. Volcanic tremor at Pu`u `O`o remained at moderate-to-high levels, as is the norm.
Read allWed, 25 Jun 2003, 06:00
Based on information from INSIVUMEH, the Washington VAAC reported that a moderate eruption began at Fuego on 29 June at 1700. Lava flows were seen, and ash fell S and SW of the volcano. As of 30 June lava flows were still visible, an ash plume was W of the summit, and seismicity was at low levels.
Read allWed, 25 Jun 2003, 06:00
As of 30 June strong degassing continued at Etna's Northeast Crater, and there were minor emissions at Bocca Nuova crater. A series of small, shallow earthquakes occurred on 26 June under Etna's E flank near the village of Fornazzo. These earthquakes are thought to be associated with an unstable section of the volcano that is slowly sliding eastward.
Read allWed, 25 Jun 2003, 06:00
During 17-25 June, only gas-and-steam emissions were observed at Chikurachki. No signs of volcanic activity were seen on satellite imagery during 25-26 June, possibly marking a break in the eruption according to KVERT. The level of seismicity was unknown because Chikurachki is not monitored with seismic instruments.
Read allWed, 25 Jun 2003, 06:00
The eruption that began at Anatahan on 10 May continued through 26 June, with fine ash emitted from the volcano's East Crater drifting W and SW. During 24-26 June, steam was primarily seen rising to low levels above the volcano, but there were periods when a more ash-laden plume rose to a maximum height of ~2 km above the volcano. The bottom of East Crater was obscured, so scientists could not determine if a lava dome was present.
Read allWed, 18 Jun 2003, 06:00
On 19 and 20 June faint ash plumes from Ulawun were visible on satellite imagery.
Read allWed, 18 Jun 2003, 06:00
Explosions continued to occur at Tungurahua during 17-24 June. During the evening of 17 June, Strombolian activity was visible at the volcano's summit. An explosion on 18 June at 0222 deposited ash in the sectors of Cusúa, Juive, and Pillate.
Read allWed, 18 Jun 2003, 06:00
Volcanic and seismic activity remained at low levels during 13-20 June. Small rockfalls and sporadic pyroclastic flows traveled down the E and N flanks of the lava dome into the Tar River Valley, White's Ghaut, and the top of Tuitt's Ghaut. Sulfur-dioxide emission rates were relatively low during the first half of the report period, increasing slightly during the middle of the week.
Read allWed, 18 Jun 2003, 06:00
On 21 June a low-level plume from Rabaul was visible on satellite imagery extending ~11 km NW of the summit.
Read allWed, 18 Jun 2003, 06:00
During 18-24 June, moderate emissions of mainly gas and steam, and sometimes ash, occurred at Popocatépetl. In addition, isolated episodes of low-amplitude harmonic tremor were occasionally recorded. One of the more significant emissions, on 20 June at 0636, produced an ash-and-steam plume to a height of ~2 km above the volcano.
Read allWed, 18 Jun 2003, 06:00
Seismicity was above background levels at Kliuchevskoi during 13-20 June, with the level of spasmodic tremor remaining near the level of the previous week. 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.
Read allWed, 18 Jun 2003, 06:00
During 18-24 June at Kilauea, lava continued to weakly enter the sea at the Highcastle entry and surface lava flows were occasionally visible on the coastal flat and upslope on the Pulama pali fault scarp. Seismicity continued at moderate levels at Kilauea's summit, with many, small, low-frequency earthquakes continuing to occur at shallow depths at a rate of about 1-2 per minute. Volcanic tremor at Pu`u `O`o remained at moderate-to-high levels, as is the norm.
Read allWed, 18 Jun 2003, 06:00
On 17 and 18 June multiple small emissions occurred at Canlaon. On the 17th and on the morning of the18th ash-and-steam plumes rose to a maximum height of ~400 m above the volcano and drifted NE. On the afternoon of the 18th plumes drifted SE.
Read allWed, 18 Jun 2003, 06:00
Ash emissions continued at Dukono during 18-24 June. On 21 June an ash plume was visible on satellite imagery at a height of about 3 km a.s.l. drifting NE.
Read allWed, 18 Jun 2003, 06:00
During June at Colima, incandescence was visible during some evenings. Tremor associated with emissions was relatively low and no significant deformation was detected. The 6.5-km-radius exclusion zone around Colima remained in effect, with other restrictions to access extending 11.5 km from the volcano's summit.
Read allWed, 18 Jun 2003, 06:00
Volcanism continued at moderate levels at Chikurachki through 18 June. On 15 and 16 June steady ash plumes were observed that were bent down the volcano's flanks by strong winds. Chikurachki remained at Concern Color Code Orange.
Read allWed, 18 Jun 2003, 06:00
The eruption that began at Anatahan on 10 May continued through 24 June, with the emission of low-level steam-and-ash plumes. On 16 June at 1613 US Geological Survey and Commonwealth Scientific and Industrial Research Organization (CSIRO) personnel saw emissions intensify from mainly low-level steam to a more ash-laden plume that rose to a height of ~2.5 km a.s.l. At this time the seismic amplitude increased from small to large.
Read allWed, 11 Jun 2003, 06:00
Relatively high volcanic activity continued at Tungurahua during 10-17 June. Several explosions took place, with the highest rising ash plume reaching ~5 km above Tungurahua. Some explosions were heard in towns near the volcano and on 10 June vibrations from an explosion were felt in the town of Baños.
Read allWed, 11 Jun 2003, 06:00
INGV-CT reported that the effusive eruption that began at Stromboli on 15 February on the upper eastern corner of the Sciara del Fuoco (a horseshoe-shaped scarp) continued until at least 16 June, with a general decrease in lava-effusion rate. During 1-6 June, there was Strombolian activity at Crater 1 (the NE crater). Most ejecta fell within the crater and pulsating dark ash was emitted.
Read allWed, 11 Jun 2003, 06:00
Volcanic activity at Soufrière Hills decreased to low levels during 6-13 June, with sporadic rockfalls and pyroclastic flows traveling down the volcano's E and NE flanks to the Tar River Valley, and White's and Tuitt's ghauts. Several energetic pyroclastic flows occurred in the Tar River Valley in the early hours of 11 June and again on the morning of 13 June.
Read allWed, 11 Jun 2003, 06:00
CENAPRED reported that a small eruption at Popocatépetl on 10 June at 1744 produced a W-drifting ash column to a height of ~3 km above the volcano. In addition, episodes of low-amplitude harmonic tremor were recorded for a total of 2 hours. According to the Washington VAAC, the volcano returned to just gas venting after the eruption.
Read allWed, 11 Jun 2003, 06:00
The second phase of an eruption that began on 30 May in the Dolomieu crater of Piton de la Fournaise ended on 6 June. Numerous seismic events were recorded during the following days until the morning of 12 June. On 13 June at 0308 eruption tremor again began within Dolomieu crater, marking the beginning of the third phase of the eruption.
Read allWed, 11 Jun 2003, 06:00
The eruption that began at Lopevi on 9 June continued through at least 14 June. An airport in Vanuatu reported to the Wellington VAAC that a thick plume rose to ~7.5 km a.s.l. on 11 June.
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