Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG) reported that white emissions rose as high as 100 m above the summit of Lewotobi Laki-laki during 20-26 March. Some rockfall events were detected by the seismic network. There were no visual observations of renewed lava effusion, and no reports of lava flow movement since 20 February. The Alert Level remained at Level 2 (on a scale of 1-4), and the public was warned to remain outside of the hazard zone, defined as a 2-km radius around the crater, the 3-km NNE sector expansion, and the 5-km NE sector expansion; both sector expansions extend from the established 2-km hazard radius.

Geological Summary. The Lewotobi edifice in eastern Flores Island is composed of the two adjacent Lewotobi Laki-laki and Lewotobi Perempuan stratovolcanoes (the "husband and wife"). Their summits are less than 2 km apart along a NW-SE line. The conical Laki-laki to the NW has been frequently active during the 19th and 20th centuries, while the taller and broader Perempuan has had observed eruptions in 1921 and 1935. Small lava domes have grown during the 20th century in both of the summit craters, which are open to the north. A prominent cone, Iliwokar, occurs on the E flank of Perampuan.

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