EC Contribution to Anak Krakatau Tsunami Warning System

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Emergency Response Coordination Centre (ERCC) – DG ECHO Daily Map | 11/04/2019 Indonesia | EC Contribution to Anak Krakatau Tsunami Warning System © European Union, 2019. Map Bandar JRC IDSL: Inexpensive Device for Sea-Level Measurement produced by JRC. The boundaries Lampung BMKG: Indonesian Agency for Meterology, Climatology and Geophysics and the names shown on this map BIG: Indonesian Geospatial Information Agency 55 min Sumatra Island do not imply official endorsement or INCOIS: Indian National Centre for Ocean Information Services acceptance by the European Union. GA/BoM: Geoscience Australia / Australian Bureau of Meteorology PTWC: Pacific Tsunami Warning and Mitigation Center SOUTH EAST JMA: Japan Meteorological Agency LAMPUNG LAMPUNG ITF: Indonesian Tsunami Society MMAF: Indonesian Ministry of Maritime Affairs and Fisheries Anak INDONESIA 2 h Px18 Krakatau 28 min Java Sea Siuntjal 27.5 min 1 h Regional Tsunami 15min Service Provider BMKG, INCOIS, GA/BoM Sebesi PTWC/JMA island Ciwandan INDIAN 35 min OCEAN Sunda BIG-010 MARINA JAMBU Strait During the 22 Dec 2018 Anak Krakatau Event (Source BIG) Sebesi Port CILEGON 30 min 20 min CITY Measured Water Level A n a k K r a k a t a u Anier Kidu 10min 31 min TANGERANG SERANG Marina SERANG CITY Jambu Krakatoa Volcanic 5min Krakatoa 29 min Eruption & Tsunami island (m) level Water 22 Dec 2018* Volcano 22 Dec 22 Dec 23 Dec Earthquakes on LEBAK 20 min 00.00 12.00 00.00 25-30 Dec 2018 Time (UTC) Mw 2.6 – 3.4 Tsunami Travel Time 15min On 22 Dec 2018 a Tsunami was generated by the MARINAJJAVAAMBUINFORMATIONIDSL-302 WEBCAM JRC Calculation collapse of the Anak Krakatau Volcano, with waves 03 April Source2019 8.15: Copernicus UTC (Source EMSR335 JRC– TAD) propagating in all directions inside the Sunda Strait, 5 min 30 min the sea portion between the Java and Sumatra 20 min 1h Islands. The Tsunami caused 430 fatalities. IDSL Sensor Coastal Areas Arrival time Following this event, the European Commission’s JRC Calculation Joint Research Centre (JRC), in collaboration with <20min 20-30 min BMKG, ITS and MMAF, worked together in order to 30 min PANDEGLANG design a tsunami warning system, including the Anak Early Warning System implementation of real time fast Tsunami Krakatau JRC IDSL installed** instruments (IDSL), developed by JRC. The new system monitors the sea level and provides email JRC IDSL planned J a v a and SMS alerts about a potential event. The JRC IDSL foreseen location activation of the sirens in the area can be performed after a human verification of the signals. Tide Gauges (BIG) 20 min I s l a n d The first two instruments (IDSL-301 and IDSL-302) IA Seismic have been installed and are currently providing Network (BMKG) data and images to the Tsunami Service Providers. *DG ECHO Daily Map 7 Jan 2019 Further instruments will be installed in the next **IDSL-301: Installed on 30 Jan 2019 months. IDSL-302: Installed on 29 Jan 2019.

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Tsunami Hazard Related to a Flank Collapse of Anak Krakatau Volcano
Downloaded from http://sp.lyellcollection.org/ by guest on January 2, 2019 Tsunami hazard related to a flank collapse of Anak Krakatau Volcano, Sunda Strait, Indonesia T. GIACHETTI1,3*, R. PARIS2,4,6, K. KELFOUN2,4,6 & B. ONTOWIRJO5 1Clermont Universite´, Universite´ Blaise Pascal, Geolab, BP 10448, F-63000 Clermont-Ferrand, France 2Clermont Universite´, Universite´ Blaise Pascal, Laboratoire Magmas et Volcans, BP 10448, F-63000 Clermont-Ferrand, France 3CNRS, UMR 6042, Geolab, F-63057 Clermont-Ferrand, France 4CNRS, UMR 6524, LMV, F-63038 Clermont-Ferrand, France 5Coastal Dynamics Research Center, BPDP-BPPT, 11th Floor, Building 2, BPPT, Jl, M. H. Thamrin no 8, Jakarta 10340, Indonesia 6IRD, R 163, LMV, F-63038 Clermont-Ferrand, France *Corresponding author (e-mail: [email protected]) Abstract: Numerical modelling of a rapid, partial destabilization of Anak Krakatau Volcano (Indonesia) was performed in order to investigate the tsunami triggered by this event. Anak Krakatau, which is largely built on the steep NE wall of the 1883 Krakatau eruption caldera, is active on its SW side (towards the 1883 caldera), which makes the edifice quite unstable. A hypothetical 0.280 km3 flank collapse directed southwestwards would trigger an initial wave 43 m in height that would reach the islands of Sertung, Panjang and Rakata in less than 1 min, with amplitudes from 15 to 30 m. These waves would be potentially dangerous for the many small tourist boats circulating in, and around, the Krakatau Archipelago. The waves would then propagate in a radial manner from the impact region and across the Sunda Strait, at an average speed of 80–110 km h21.
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