December 22, 2018 Tsunami: Krakatau, Indonesia

Ref #12312, 12314, 12316, 12324, 12325, 12328:

BNPB reported 437 fatalities, 16 missing, 14059 injured and 33719 displaced. Number of people missing has decreased while people injured has significantly increased to 14,059 people since more people have access to medical services. At least 2752 houses, 92 hotels and villas, and 510 boats are reported damaged. These casualties and material damage came from five regencies namely Pandenglang, Serang, South Lampung, Pesawaran and Tanggamus.

The number of victims and the areas most affected by the damage were coastal areas in Pandenglang District. In this area is a beach tourist area with hotel and villa facilities that are lined up along the coast. Especially when the tsunami incident during a long holiday [...] The absence of tsunami early warning also caused a significant number of casualties because the community did not have the opportunity to evacuate.

Ref #12313:

An underwater landslide caused by activity from the Anak Krakatau volcano is being blamed for a tsunami that struck

Ref #12315:

The tsunami was caused by "an undersea landslide resulting from volcanic activity on Anak Krakatau" and was exacerbated by an abnormally high tide because of the current full moon, [BNPB spokesman Sutopo Purwo Nugroho] said."The tsunami hit several areas of the Sunda Strait, including beaches in Pandeglang regency, Serang, and South Lampung," the agency said.

Coastal residents reported not seeing or feeling any warning signs, such as receding water or an earthquake, before waves of 2-3 metres washed ashore. Authorities said a warning siren went off in some areas.

Ref #12318:

tsunami was triggered by a landslide from Anak Krakatau. There are two strong pieces of evidence for this. First, whilst it has not been possible to obtain visual satellite imagery of the island because of the weather, radar data has been available.

Secondly, a strong seismic signal was generated by the landslide, which was detected on a number of seismometers[...]seismic signal has a very strong low frequency component, characteristic of a landslide-induced, rather than a tectonic event.

Ref #12323:

Severe impacts localised at the south part of Pandeglang

Ref #12376:

volume of material initially lost from the volcano flank was small (~0.1 km3) but was nonetheless able to generate rapid tsunami waves with devastating impacts

Ref #12785:

Approximately 228 m of the top part of the AKV slid into the sea as a result of the eruption

Ref #12662:

occurred at night, hindering any direct visual anticipation and interaction by local communities[...]flow depths found to be higher in Banten than at Lampung

Ref #12482:

437 died (1 Tanggamus, 1 Pesawaran, 118 Lampung Selatan, 21 Serang, 296 Pandeglang), 31943 injured, 10 missing

Ref #12488:

On Dec 22, 2018, at approximately 20:55-57 local time, Anak Krakatau volcano, located in the Sunda Straits of Indonesia, experienced a major lateral collapse during a period of eruptive activity that began in June. The collapse discharged volcaniclastic material into the 250 m deep caldera southwest of the volcano

Ref #12721:

From this perspective, our hypothesis that the seismic event identified herein 2 mins before the Anak Krakatau landslide acted as an external trigger is plausible but remains to be tested further.

Ref #1250:

453 deaths, USD 250 million total damages

Ref #12720:

runup heights exceeded 85 m on the northern coast of Rakata and 83 m on the southern coast of Sertung