The Influence of Mentawai Tsunami to Public Policy on Tsunami Warning in Indonesia

2012 ◽  
Vol 7 (1) ◽  
pp. 102-106 ◽  
Author(s):  
Pariatmono ◽  
Keyword(s):  
Public Policy ◽  
Early Warning Systems ◽  
Careful Examination ◽  
Management Approach ◽  
Warning Systems ◽  
Tsunami Early Warning ◽  
Warning Message ◽  
Future Events ◽  
The Government ◽  
Tsunami Early Warning Systems

The tsunami on October 25, 2010, in Mentawai is examined in this paper. In particular, since the Indonesia Tsunami Early Warning Systems (InaTEWS) has already been operational, careful examination of its effectiveness are made, followed by suggestions for the development of a public policy, which needs to be adopted by the Government of Indonesia. The investigation started with a detailed explanation of InaTEWS, its components, and its performance indicators. For the Mentawai case, a new management approach concerning the research visa permits was taken, which will be adopted for future events. Several points for improvement are identified, such as developing the warning message contents to include estimate time arrivals and wave height and performing systematic culture components. All the improvements were adopted in the Presidential Instruction to serve as a strong legal basis for a public policy.

scholarly journals Real-time inversion of tsunamis generated by landslides

2011 ◽  
Vol 11 (9) ◽  
pp. 2511-2520 ◽  
Author(s):  
C. Cecioni ◽  
A. Romano ◽  
G. Bellotti ◽  
M. Risio ◽  
P. de Girolamo
Keyword(s):  
Real Time ◽  
Laboratory Experiments ◽  
Early Warning Systems ◽  
Time Inversion ◽  
Warning Systems ◽  
Optimal Position ◽  
Tsunami Early Warning ◽  
Tsunami Waves ◽  
Inversion Procedure ◽  
Tsunami Early Warning Systems

Abstract. In this paper, we test a method for forecasting in real-time the properties of offshore propagating tsunami waves generated by landslides, with the aim of supporting tsunami early warning systems. The method uses an inversion procedure, that takes input data measurements of water surface elevation at a point close to the tsunamigenic source. The measurements are used to correct the results of pre-computed numerical simulations, reproducing the wave field induced by different landslide scenarios. The accuracy of the method is evaluated using the results of laboratory experiments, aimed at studying tsunamis generated by landslides sliding along the flank of a circular shoreline island. The paper investigates what the optimal position is of where to measure the tsunamis, what the effects are, the accuracy of the results, and of uncertainties on the landslide scenarios. Finally, the method is successfully tested using partial input time series, simulating the behaviour of the system in real-time during the tsunami event when forecasts are updated, as the measurements become available.

scholarly journals Tsunami Generation Potential of a Strike-slip Fault Tip in the Westernmost Mediterranean

2021 ◽  
Author(s):  
F. Estrada ◽  
J. M. González-Vida ◽  
J. A. Peláez ◽  
J. Galindo-Zaldívar ◽  
S. Ortega ◽  
...  
Keyword(s):  
Early Warning ◽  
Seismic Activity ◽  
Early Warning Systems ◽  
Strike Slip ◽  
Strike Slip Fault ◽  
Tsunami Generation ◽  
Warning Systems ◽  
Tsunami Early Warning ◽  
Seafloor Deformation ◽  
Tsunami Early Warning Systems

Abstract Tsunamis are triggered by sudden seafloor displacements, and usually originate from seismic activity at faults. Nevertheless, strike-slip faults are usually disregarded as major triggers, as they are thought to be capable of generating only moderate seafloor deformation; accordingly, the tsunamigenic potential of the vertical throw at the tips of strike-slip faults is not thought to be significant. We found the active dextral NW-SE Averroes Fault in the central Alboran Sea (westernmost Mediterranean) has a historical vertical throw of up to 5.4 m at its northwestern tip corresponding to an earthquake of Mw 7.0. We modelled the tsunamigenic potential of this seafloor deformation by Tsunami-HySEA software using the Coulomb 3.3 code. Waves propagating on two main branches reach highly populated sectors of the Iberian coast with maximum arrival heights of 6 m within 21 and 35 min, which is too quick for current early-warning systems to operate successfully. These findings suggest that the tsunamigenic potential of strike-slip faults is more important than previously thought, and justify the re-evaluation of tsunami early-warning systems worldwide.

scholarly journals High-frequency ocean radar support for Tsunami Early Warning Systems

2018 ◽  
Vol 5 (1) ◽  
Author(s):  
Anna Dzvonkovskaya ◽  
Leif Petersen ◽  
Thomas Helzel ◽  
Matthias Kniephoff
Keyword(s):  
Early Warning ◽  
High Frequency ◽  
Early Warning Systems ◽  
Warning Systems ◽  
Tsunami Early Warning ◽  
Tsunami Early Warning Systems ◽  
Ocean Radar
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