The MVO reported that during 24 November-1 December volcanism continued at an elevated level, with continued growth of the lava dome. Seismic activity was comparable to the previous week. Rockfalls were observed cascading down the E and S faces of the dome and new rockfall deposits were seen on the E side of the volcano in the upper portion of Tar River Valley.
On 24 November a gas-and-steam plume rose 400 m above the volcano and extended 5 km to the E. No seismicity was registered at Shiveluch during most of the period during 24 November to 1 December, but at 0935 on 27 November a strong, shallow seismic event occurred. KVERT raised the Concern Color Code from Green to Yellow.
Volcanic activity continued at a high rate at Popocatépetl, with several small-to-moderate exhalations and eruptions. Remote-sensing data, aviation sources, and CENAPRED provided more details. One of the larger series of eruptions occurred during 0900 to 1215 on 29 November, sending ash-and-steam plumes to ~7.3 km a.s.l to the ENE.
During 21-27 November small explosions occurred at Merapi, with the largest producing an ash plume that rose up to 800 m above the summit. Seismicity was high and dominated by multi-phase earthquakes. The volcano remained at Alert Level 2 (ranging from 1 to 4).
Lava continued to flow into the ocean at the Kamokuna entry. Overall, earthquake activity was low across the island. Tremor and a few shallow earthquakes continued to be detected at Kilauea's summit; the tremor local to the summit was particularly noticeable.
The VSI reported that volcanic activity during 21-27 November was similar to the previous week. A thin ash plume was observed rising ~600 m above the summit from the main crater and Crater II. Booming sounds were frequently heard from the volcano's summit, and a "red flame" was observed some nights rising ~100 m above the summit.
According to Italy's Volcanoes website, lava emission continued from both vents in the Bocca Nuova Crater with variable intensity. On 30 November observations revealed that after 3 months of low activity a small lava flow issued from the NNE fissure in the SE Crater. Lava extrusion was accompanied by strong degassing, but there was no explosive activity.
The IG reported that seismicity and explosive activity were at low levels during the week. On 27 November small ash-and-gas discharges reached a maximum altitude of 500 m above the summit.
Wed, 22 Nov 2000, 06:00
The MVO reported that during 17-24 November volcanism continued at an elevated level, with the continued growth of the lava dome and a significant increase in the number of detected rockfall signals. The latter parameter more than doubled relative to the previous week. On the other hand, the number and energy of long-period earthquakes decreased.
Read allWed, 22 Nov 2000, 06:00
Volcanic activity continued at a high rate at Popocatepetl, with several small-to-moderate exhalations and eruptions. Remote-sensing and aviation sources provided more details. The Mexico City MWO reported to the Washington VAAC that three exhalations at 0419, 0421, and 0500 on 21 November sent ash to 5-7 km a.s.l.
Read allWed, 22 Nov 2000, 06:00
Lava continued to flow through the tube system, entering the sea at the Kamokuna entry. Overall, earthquake activity was low across the island. Volcanic tremor near Pu`u `O`o vent remained at a moderate level, while tremor and a few shallow earthquakes were detected at Kilauea's summit.
Read allWed, 22 Nov 2000, 06:00
The VSI reported that volcanic activity during 14-20 November was similar to the previous week. A thin ash plume was observed rising ~600 m above the summit from the main crater and crater II. A booming sound was frequently heard from the volcano's summit, and a "red flame" was observed some nights rising ~75 m above the summit.
Read allWed, 22 Nov 2000, 06:00
Volcanic activity at Guagua Pichincha was low during the week and seismicity was relatively stable. There was a slight increase in seismicity on 27 November, but there were no indications of dramatic changes in volcanic activity.
Read allWed, 22 Nov 2000, 06:00
According to the Italy's Volcanoes website, Italian press sources reported that a new burst of seismic activity occurred near Etna's NNW flank on 19-21 November. The earthquakes were thought to be of tectonic origin. During the week mild eruptive activity continued at the Bocca Nuova crater as it has for several weeks, and incandescence was noted at the NE and SE Craters.
Read allWed, 15 Nov 2000, 06:00
A slight increase in activity occurred during the week, with steam-and-gas emissions and a loud noise from the active MH vent. By 16 November a small new vent SE of the MH vent was also steaming. The increase in activity was not accompanied by any significant seismic activity.
Read allWed, 15 Nov 2000, 06:00
The IG reported that seismicity and explosive activity were at low levels during the week, but by 20 November there was an increase in seismicity.
Read allWed, 15 Nov 2000, 06:00
The MVO reported that during 10-17 November, volcanism continued at an elevated level, with the continued growth of the lava dome on the eastern side of the summit region. The level of seismicity was higher than in the previous week, with a marked increase in the number of long-period earthquakes. The lava dome was still dominated by the extrusion of a large lava spine that had an altitude of 1,059 m a.s.l. on 12 November, and 1,077 m a.s.l. by 13 November, which was the greatest height that had been measured throughout the eruption.
Read allWed, 15 Nov 2000, 06:00
Volcanic activity continued at a high rate at Popocatepetl, with several small-to-moderate exhalations. The Mexico City MWO and the Washington VAAC reported that at 0947 on 14 November a small ash-and-steam exhalation produced a cloud that was visible on GOES-8 imagery; it reached an altitude of ~8 km a.s.l. The cloud rapidly dissipated as it moved briefly to the NNE.
Read allWed, 15 Nov 2000, 06:00
The OVPDLF reported that high amplitude tremor that occurred for about a week abruptly stopped at 1845 on 13 November, probably marking the end of the eruption. However, due to the recent seismic activity the volcano is being closely observed for signs of future eruptions.
Read allWed, 15 Nov 2000, 06:00
The VSI reported that during the week small explosions produced ash plumes that rose up to 430 m above Merapi's summit. High rains during 7 to 13 November caused landslides to occur in the upstream portion of Boyong river, Kaliurang. The river is on the S flank of Merapi and extends ~28 km map distance from the summit.
Read allWed, 15 Nov 2000, 06:00
Lava continued to flow across the coastal flat and into the sea near the Kamokuna entry. Surface flows were visible sporadically during the week. At 1408 on 16 November tour pilots observed a large collapse of the bench (land built out from the sea cliff) at Kamokuna that sent ~30 % of the bench into the sea in ~6 seconds.
Read allWed, 15 Nov 2000, 06:00
The VSI reported that volcanic activity continued at Karangetang. Low-level ash plumes were emitted from the main crater and crater II. A booming sound was frequently heard from the volcano's summit, and a "red flame" was observed some nights rising ~75 m above the summit.
Read allWed, 15 Nov 2000, 06:00
Volcanic activity at Guagua Pichincha was low during the week and seismicity was relatively stable. No dramatic changes in the morphology of the lava dome were observed, but the IG suspects that slow and continuous dome growth may be occurring.
Read allWed, 15 Nov 2000, 06:00
The Volcanological Observatory of Colima University reported that during the week seismicity was at an average level and deformation was low. A small seismic swarm occurred during 0237-0640 on 16 November.
Read allWed, 8 Nov 2000, 06:00
The IG reported that seismicity and explosive activity were at low levels during the week. The Washington VAAC reported that on 13 November a small ash cloud, which was near summit level and blown to the SE, was visible in GOES-8 imagery.
Read allWed, 8 Nov 2000, 06:00
The MVO reported that during 3-10 November, volcanism continued at an elevated level and seismicity was slightly higher than the previous week. Dome growth continued and rockfalls occurred on the E side of the crater. Heavy rainfall on 4 and 8 November produced mudflows that traveled to the NW down the Belham River.
Read allWed, 8 Nov 2000, 06:00
During the week volcanic activity was high at Popocatepetl, with several exhalations and eruptions. CENAPRED reported that exhalations at 1456 and 1541 on 7 November sent ash clouds to 2 and 4.5 km above the volcano, respectively. The Mexico City MWO reported to the Washington VAAC that an ash-and-steam exhalation at 1150 on 9 November sent ash to ~9.5 km a.s.l.
Read allWed, 8 Nov 2000, 06:00
According to OVPDLF, the eruption that began on 12 October at Piton de la Fournaise continued through 13 November. A new cone named "Piton Morgabim" developed in the beginning of November and on 8 November a 10- to 15-km-diameter lava lake formed, which had intense degassing and heavy lava fountaining. During the course of the eruption, 4.5-km-long lava flows formed E of the volcano in the "Grand Brûlé" area, and ~2-km-long lava flows issued from "Piton Morgabim.".
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