Marapi volcano (Indonesia) - Smithsonian / USGS Weekly Volcanic Activity Report for 25 April-1 May 2001 (New Activity / Unrest)

Wed, 25 Apr 2001, 06:00
06:00 AM | BY: VN
VSI reported that the Marapi eruption at 0814 on 16 April produced a cauliflower-shaped black ash plume that rose 2 km above the summit. Ash, lapilli, and volcanic bombs were ejected during the eruption and fell within the crater. In addition, ash fell in many villages on the S and SW flanks of the volcano.
Within 1-4 km from the summit the thickness of the ash deposits was between 2 and 3 cm. Until 18 April approximately 150 smaller explosions continuously occurred. The 16 April eruption was preceded by shallow volcanic earthquakes that began on 7 April and by continuous volcanic tremor recorded on 9 April.
Small eruptions occurred at 1283 and 1600 on 13 April. VSI had increased the Alert Level at Marapi from 1 to 2 following the minor activity that began on 13 April.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)
From: Global Volcanism Program, 2001. Report on Marapi. In: Mayberry, G (ed.), Weekly Volcanic Activity Report 25 April-1 May 2001. Smithsonian Institution and US Geological Survey.

Previous news

Wed, 18 Apr 2001, 06:00
Based on information from VSI, the Darwin VAAC reported that after increased volcanic activity occurred over the preceding two weeks VSI raised the Alert Level at Marapi from 1 to 2. The increased activity included an eruption on 16 April that sent an ash cloud up to 2 km above the summit. In addition, an eruption on about 23 April produced an ash cloud that rose up to ~6 km a.s.l. and drifted to the E. ... Read all
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