Time-Dependent Tsunami Source Following the 2018 Anak Krakatau Volcano Eruption Inferred from Nearby Tsunami Recordings

The eruption of the Anak Krakatau volcano, Indonesia, on 22 December 2018 induced a destructive tsunami (the Sunda Strait tsunami), which was recorded by four nearby tidal gauges. In this study we invert records and recover generation process. Two sources are obtained, static one instant initial water elevation time-dependent accounting for continuous evolution height. results found to reproduce recordings more satisfactorily. complete process lasts approximately 9 min features two-stage with similar intensity. Each stage about 3.5 elevates volume 0.13 km3. time, duration volcano in general agree seismic geomorphological interpretations. We also test different sizes potential source region, lead maximum wave height area, but all show robust feature two stages generation. Our imply complex during eruption.