Abstract
Abstract. This paper investigates the feasibility of Tsunami Early Warning Systems for small volcanic islands focusing on warning of waves generated by landslides at the coast of the island itself. The critical concern is if there is enough time to spread the alarm once the system has recognized that a tsunami has been generated. We use the results of a large scale physical model experiment in order to estimate the time that tsunamis take to travel around the island inundating the coast. We discuss how and where it is convenient to place instruments for the measurement of the waves.
Highlights
Tsunami waves are mostly generated by earthquakes and landslides
We can assume that when the maximum surface elevation value has been recorded at the wave gauges, the system is able of estimating the maximum inundation at the coastal points; the time elapsed between the measurement and the arrival of the largest wave is another critical parameter to be considered during the design of the Tsunami Early Warning Systems (TEWS)
We have provided with data about the propagation times of the tsunami around the island that, once scaled at the appropriate prototype scale, may be used to design and optimize a TEWS
Summary
Tsunami waves are mostly generated by earthquakes and landslides. In both cases the largest waves, and the more destructive effects, are induced along the coastal regions in proximity of the tsunamigenic sources: these areas are attacked by the waves after a very short time since their generation. It is composed of instruments that monitor instabilities of the subaerial flank of the volcano (Casagli et al, 2009) and one instrument that measures the water elevation in order to detect tsunamis The former alert the population of the island if a landslide occurs; the latter confirms the hazard if a tsunami has been generated. We can assume that when the maximum surface elevation value has been recorded at the wave gauges, the system is able of estimating the maximum inundation at the coastal points; the time elapsed between the measurement and the arrival of the largest wave is another critical parameter to be considered during the design of the TEWS. In this paper the results obtained at all the run-up gauges and all the surface level gauges (depicted in Fig. 2 and summarised in Table 1) are used for the tests with r0=2.20 m and for all the values of ζ
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
