PVMBG reported that there were four eruptive events during 15-22 April and multiple events on 23 April recorded by Anak Krakatau?s seismic network, though no emissions were visible.
The Alert Level remained at 2 (on a scale of 1-4), and residents were warned to remain outside of the 2-km radius hazard zone from the crater.
Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)
Asosan (Japan)