La Soufrière Volcano (Montserrat) - eruption update: dome growth and pyroclastic flows
Montserrat's Soufrière Hills volcano's lava dome continues its rapid vertical growth. By 27 February, a large spine about 30m across and at least 30m high had developed at the summit of the lava dome. By 28 February this spine had split into two parts and was leaning precariously to the northeast. At about 9:15pm on 28 February the overhanging parts of the spine disintegrated and generated pyroclastic flows that travelled down Tar River Valley almost as far as the coast. A visible low-altitude ash cloud drifted away to the west of Montserrat.
In the following days, other parts of the spine and lava dome didisintegrated further. Rockfalls were visible on the north, northeastern and eastern flanks of the volcano.
The seismic network of MVO recorded 185 rockfall signals, 52 long period – rockfall signals, 157 long period earthquakes and 7 volcano-tectonic earthquakes. Measured sulphur dioxide fluxes were relatively low during the past week, with an average of 388 tonnes per day (t/d) with a maximum of 636 tonnes per day obtained on 26 February.
Residents of Montserrat and visitors to the island are advised to tune into ZJB Radio for up-to-date information on the volcano. Access to all areas south of Richmond Hill, and south of Jack Boy Hill to Bramble airport and beyond is prohibited at all times. The daytime entry zone, comprising the top part of St. George’s Hill, is open from 6 am to 6 pm. The maritime exclusion zone around the southern part of the island extends 3 km off shore from Whites Yard to Roches Yard on the east side of the volcano, 2 km offshore from O’Garras to Gingoes on the south-west, and 200 m offshore from Plymouth.
Source: Montserrat Volcano Observatory (MVO)
Tom and Marco are just back home from our pilot tour to Nyiragongo volcano, which was very successful, so we plan to repeat the tour in July this year already. In the near future, we will post photos from the tour as well as details about the tour. Stay tuned!... [meer...]
2005 is soon over, and it's a good time to take a break and think about important things in life. The VolcanoDiscovery team wishes you a future without wars and tsunamis. Merry Christmas![meer...]