Soufrière Hills (Montserrat): summary of the elevated activity during the past week
Details of the recent elevated activity at Soufrière Hills lava dome are summarized in the following excerpt from the activity report published by the MVO (Montserrat Volcano Observatory):
>>During the vigorous ash and steam venting on 10 February, a small dark lobe of lava was observed on the western side of the lava dome... By...11 February this lobe had advanced rapidly towards the northeast side of the dome and was visible as a steep-sided plateau of lava from inhabited areas around Salem.
Photographs from fixed cameras...showed continued changes to this lava lobe over the next few days and the northeast margin could be seen to glow at night and shed rockfalls... The initial growth rate of this lobe was well over 5 cubic metres per second but the rate is now declining. The new lava lobe has begun to fill the gap between the lava dome and the northern and western crater walls and therefore small rockfalls may spill over the northern and western crater walls in the coming weeks.
The seismic network recorded 105 rockfall signals, 70 long period – rockfall signals, 121 long period earthquakes, 9 volcano-tectonic earthquakes and 2 hybrid earthquakes. Most of the long period and long period - rockfall signals were associated with venting on 10-11 February. Measured sulphur dioxide fluxes have fluctuated between 295 tonnes per day (on the 15 February) and 874 t/d (13 February) during the reporting period. The average of the available data for the period stands at 568 t/d, which is just above the long-term average of 500 t/d.
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 2 km off shore from Pelican Ghaut 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.<<
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!... [more]
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![more]
The tours this year on Santorini are now over, too, with lots of fun and great company as well. Thanks to all participants!
Before we send out our formal newsletter, when the programs for 2006 are completed, a quick notice to announce that Tom will offer a new, 12-days tour / expedition to the Rift Valley including Lengai volcano in Feb. and summer 2006, Costa Rica in late March and (probably) July 2006. As well, Tobias (who is right now touring in the Saronic Gulf) awaits with a new, exciting program on Milos, a wonderful, volcanic island in Greece! Other new or recently developped programs include Nisyros (Greece) and the Eifel region in Germany (details will come soon).
Greetings from Athens! Tom
Hello everybody on the tours in Indonesia this summer!