Indonesia's Geology Agency said Anak Krakatau expanded by 32.8 hectares after early-September eruptions, and satellite images showed two nearby formations that still need confirmation.
Indonesia's Geology Agency said Anak Krakatau expanded by 32.8 hectares after eruptions produced lava flows, and that satellite imagery detected two new land formations nearby, Reuters reported.
The increase was identified by comparing Sentinel satellite images from August 8 and September 15. The agency posted the comparison on social media in late September. The volcano erupted for 25 hours from September 4 to September 6, sending lava northwest, west and southwest.
Sentinel imagery from September 23 showed a formation about 760 metres northwest of the coastline and another about 495 metres southeast. The agency said the formations, on either side of the crater, may be linked to the eruptions but that more data are needed to determine whether they are new eruption centres.
The eruptions sent ash over Jakarta and surrounding areas and closed several airports, affecting more than 340,000 travellers, with 2,961 flights cancelled, delayed or diverted.
Anak Krakatau is one of about 130 active volcanoes in Indonesia, which sits on the Pacific Ring of Fire. The agency did not report new casualties in the Sunday account of the satellite findings.