The Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG) reported that eruptive activity at Marapi’s Verbeek Crater (on Sumatra) continued during 2-8 April. An eruptive event at 2233 on 1 April was recorded by the seismic network but not observed. At 0625 on 2 April a gray ash plume rose 350 m above the summit and drifted NE and at 1604 a dense gray ash plume rose 1 km above the summit and drifted E. On 3 April at 1804 a dense gray ash plume rose 400 m and drifted E. At 0712 on 3 April an eruptive event that lasted one minute and nine seconds produced an ash plume that rose 1.5 km above the summit and drifted E. The Alert Level remained at 2 (on a scale of 1-4) and the public was warned to stay 3 km away from the active crater.

Geological Summary. Gunung Marapi, not to be confused with the better-known Merapi volcano on Java, is Sumatra's most active volcano. This massive complex stratovolcano rises 2,000 m above the Bukittinggi Plain in the Padang Highlands. A broad summit contains multiple partially overlapping summit craters constructed within the small 1.4-km-wide Bancah caldera. The summit craters are located along an ENE-WSW line, with volcanism migrating to the west. More than 50 eruptions, typically consisting of small-to-moderate explosive activity, have been recorded since the end of the 18th century; no lava flows outside the summit craters have been reported in historical time.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)