Dome growth has continued, over the entire summit region, with rockfalls occurring over a wide sector of the dome, dominantly towards the southeast, east and northeast. In the northeast, rockfalls have spilled over the talus lip left by the 29 July 2001 dome collapse. A number of pyroclastic flows have reached the sea (2 km) down the Tar River Valley during this reporting period. At the beginning of the week, winds from the southeast led to light ashfall in the northwest and north of the island. The ash was derived from the ongoing rockfall and venting activity of the dome. Heavy rain on 2 April eroded a part of the talus slope on the east side of the volcano but did not affect the dome summit region.
Sulphur dioxide (SO2) emission rates, measured using DOAS spectrometers, decreased slightly this week, ranging from 6.2 to 10.7 kilograms per second. The daytime entry zone (DTEZ) remains open; weather permitting. Activity could increase quite suddenly, with a dangerous situation developing very quickly. Ash masks should be worn in ashy conditions. The Belham Valley should be avoided during and after heavy rainfall due to the possibility of mudflow activity.
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 Plymouth, Bramble airport and beyond is prohibited. There is a maritime exclusion zone around the southern part of the island that extends two miles beyond the coastline from Trant's Bay in the east to Garibaldi Hill on the west coast.