PVMBG reported that eruptive activity at Lewotobi’s Laki-laki volcano continued during 12-18 June. Multiple eruptive events were recorded daily by the seismic network daily. Daily gray or white-and-gray ash plumes rose 100-1,000 m above the summit and drifted SW, W, and NW. According to news articles ashfall was reported during 12-13 June in villages to the NW and NE, including Klatanlo (5 km NW), Hokeng Jaya (4 km NW), Persiapan Padang Pasir, Nawokote (5 km W), and Boru (8 km WNW) in the Wulanggitang District, along with Nobo (5 km NE) and Dulipali (6 km NNW) in the Ile Bura District. Workers sprayed water on several streets to wash off the ashfall. On 15 June ashfall was reported in areas to the SW including the communities of Padang Pasir, Wotupudor, and Kumaebang, and in Boru village. On 16 June ashfall affected the Frans Seda Sikka (60 km WSW) and Haji Hasan Aroeboesman Ende (126 km WSW) airports, causing disruptions to flights at Frans Seda Sikka. The Alert Level remained at 2 (the second lowest level on a scale of 1-4) and the public was warned to stay outside of the exclusion zone, defined as a 2-km radius around Laki-laki crater, 3 km to the NNE, and 5 km on the NE flanks.

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.

Sources: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM), Antara News, Antara News, Antara News