Activity at the Soufrière Hills Volcano is low.

The seismic network recorded three rockfalls, three volcano-tectonic earthquakes and one long-period earthquake this week.

Sulphur-dioxide measurements gave an average flux of 313 tonnes/day with a maximum of 435 and a minimum of 160 tonnes/day. Measurements were only possible on three days this week because of adverse wind conditions.

Pyroclastic flows can occur at any time without warning on any side of the volcano, including Gages from where they can travel rapidly into Plymouth. Tracks across the Belham valley are frequently destroyed or heavily modified by flash flooding or lahars, and caution should be exercised crossing the valley during and after rainfall.

The Hazard Level is 2. There is no access to Plymouth or Zone V. There is daytime access to Zone C: 8 am to 4 pm, Monday to Saturday. Maritime zone W remains daytime transit only (boats may sail through the zone but must not stop).

MVO Weekly Report 10 May 2013
MVO Weekly Report 3 to 10 May 2013
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Activity at the Soufrière Hills Volcano is low.

The seismic network recorded three volcano-tectonic earthquakes this week.

Sulphur-dioxide measurements gave an average flux of 379 tonnes/day with a maximum of 466 and a minimum of 254 tonnes/day.

The wind has been mainly towards the north and north-east since the night of 1/2 May. This has blown the volcanic plume over inhabited areas and the smell of volcanic gases has been noticeable at times.

Many Montserrat residents felt an earthquake at 2:56 am (local time) on Tuesday 30 April. This was located to the west of Barbuda, approximately 100 km north of Montserrat. The earthquake had a magnitude (Mt) of 5.3 and a depth of 58 km. It was not associated with the Soufrière Hills Volcano.

Pyroclastic flows can occur at any time without warning on any side of the volcano, including Gages from where they can travel rapidly into Plymouth. Tracks across the Belham valley are frequently destroyed or heavily modified by flash flooding or lahars, and caution should be exercised crossing the valley during and after rainfall.

The Hazard Level is 2. There is no access to Plymouth or Zone V. There is daytime access to Zone C: 8 am to 4 pm, Monday to Saturday. Maritime zone W remains daytime transit only (boats may sail through the zone but must not stop).

Note: This report has been revised to include information on the Barbuda earthquake on 30 April 2013.

MVO Weekly Report 3 May 2013
MVO Weekly Report 26 April - 3 May 2013
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MVO Weekly Report 3 May 2013 (revised)
MVO Weekly Report 26 April to 3 May 2013 (revised)
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There was a magnitude 5.3 earthquake near Barbuda early this morning (30 April), at 02:56 local time. This was felt by many people on Montserrat. The earthquake was about 100 km away and is not associated with the Soufriere Hills Volcano.

More information is available from the SRC web site.

If you felt the earthquake, please report it here.

Activity at the Soufrière Hills Volcano is low.

The seismic network recorded three volcano-tectonic earthquakes this week.

Sulphur-dioxide measurements gave an average flux of 366 tonnes/day with a maximum of 535 and a minimum of 181 tonnes/day.

There have been no good views of the dome for over a month now. Reports from helicopter pilots suggest that most of the large slab on the eastern side of the dome is now gone; removed by the pyroclastic flow on 28 March 2013.

Pyroclastic flows can occur at any time without warning on any side of the volcano, including Gages from where they can travel rapidly into Plymouth. Tracks across the Belham valley are frequently destroyed or heavily modified by flash flooding or lahars, and caution should be exercised crossing the valley during and after rainfall.

The Hazard Level is 2. There is no access to Plymouth or Zone V. There is daytime access to Zone C: 8 am to 4 pm, Monday to Saturday. Maritime zone W remains daytime transit only (boats may sail through the zone but must not stop).

MVO Weekly Report 26 April 2013
MVO Weekly Report 19 - 26 April 2013
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Activity at the Soufrière Hills Volcano is low.

The seismic network recorded two rockfalls and four volcano-tectonic earthquakes this week.

Sulphur-dioxide measurements gave an average flux of 556 tonnes/day with a maximum of 1155 and a minimum of 271 tonnes/day.

Pyroclastic flows can occur at any time without warning on any side of the volcano, including Gages from where they can travel rapidly into Plymouth. Tracks across the Belham valley are frequently destroyed or heavily modified by flash flooding or lahars, and caution should be exercised crossing the valley during and after rainfall.

The Hazard Level is 2. There is no access to Plymouth or Zone V. There is daytime access to Zone C: 8 am to 4 pm, Monday to Saturday. Maritime zone W remains daytime transit only (boats may sail through the zone but must not stop).

MVO Weekly Report 19 April 2013
MVO Weekly Report 12 - 19 April 2013
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Activity at the Soufrière Hills Volcano is low.

The seismic network recorded no seismic events related to the volcano this week.

Sulphur-dioxide measurements gave an average flux of 325 tonnes/day with a maximum of 585 and a minimum of 186 tonnes/day.

Pyroclastic flows can occur at any time without warning on any side of the volcano, including Gages from where they can travel rapidly into Plymouth. Tracks across the Belham valley are frequently destroyed or heavily modified by flash flooding or lahars, and caution should be exercised crossing the valley during and after rainfall.

The Hazard Level is 2. There is no access to Plymouth or Zone V. There is daytime access to Zone C: 8 am to 4 pm, Monday to Saturday. Maritime zone W remains daytime transit only (boats may sail through the zone but must not stop).

MVO Weekly Report 12 April 2013
MVO Weekly Report 5 - 12 April 2013
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Activity at the Soufrière Hills Volcano is low.

The seismic network recorded three rockfalls this week.

Sulphur-dioxide measurements gave an average flux of 372 tonnes/day with a maximum of 477 and a minimum of 255 tonnes/day.

Heavy rainfall early in the morning of 30 March generated lahars in several valleys and ghauts around the volcano, including in the Belham Valley. These started at about 2:30 am and lasted for more than an hour.

Pyroclastic flows can occur at any time without warning on any side of the volcano, including Gages from where they can travel rapidly into Plymouth. Tracks across the Belham valley are frequently destroyed or heavily modified by flash flooding or lahars, and caution should be exercised crossing the valley during and after rainfall.

The Hazard Level is 2. There is no access to Plymouth or Zone V. There is daytime access to Zone C: 8 am to 4 pm, Monday to Saturday. Maritime zone W remains daytime transit only (boats may sail through the zone but must not stop).

MVO Weekly Report 5 April 2013
MVO Weekly Report 29 March - 5 April 2013
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Activity at the Soufrière Hills Volcano is low.

The seismic network recorded five rockfalls, two volcano-tectonic earthquakes and one long-period event this week.

Sulphur-dioxide measurements were possible on only five days this week, giving an average flux of 529 tonnes/day with a maximum of 644 and a minimum of 348 tonnes/day.

There was a pyroclastic flow in the Tar River Valley at about 5 am (local time) on Thursday 28 March. The flow was not observed directly, but the deposits show that it travelled half-way down the valley, to between 1 and 1.5 km from the dome. There have been no reports of ash fall; any ash cloud was probably blown over Plymouth and out to sea. We have not been able to determine the source of the flow due to cloud cover, but it was probably the large slab recently observed to be peeling away from the dome above the Tar River Valley.

Heavy rainfall during the evening of 28 March generated large lahars in several valleys and ghauts around the volcano, including in the Belham Valley. These started at about 7pm and lasted for several hours.

Pyroclastic flows can occur at any time without warning on any side of the volcano, including Gages from where they can travel rapidly into Plymouth. Tracks across the Belham valley are frequently destroyed or heavily modified by flash flooding or lahars, and caution should be exercised crossing the valley during and after rainfall.

The Hazard Level is 2. There is no access to Plymouth or Zone V. There is daytime access to Zone C: 8 am to 4 pm, Monday to Saturday. Maritime zone W remains daytime transit only (boats may sail through the zone but must not stop).

MVO Weekly Report 29 March 2013
MVO Weekly Report 22 - 29 March 2013
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