TSUNAMIS FROM STRIKE-SLIP AND NORMAL EARTHQUAKES AND ITS RELATION WITH THE PRODUCT OF DOMINANT PERIOD AND DURATION OF MORE THAN 50 SECONDS OF EARTHQUAKE P-WAVE

Abstract

It is widely known that earthquakes with strike-slip or normal-faulting crustal displacements have generated destructive tsunamis around the world. Many researchers have proposed that the main cause of such events was due to factors not associated with tsunami-seismic parameters. However, the present study examines a correlation between tsunamis generated by strike-slip or normal-faulting earthquake events and their associated two tsunami-seismic parameters, namely the dominant period 𝑇d and the duration of more than 50 seconds, 𝑇50ex of earthquake P-wave, and compares these with tsunami event validity (TEV). Based on this analysis, we confirm a correlation between tsunamis generated by strike- slip or normal-faulting earthquake events with periods 𝑇d × 𝑇50ex≥ 10 s. Thus, we propose that major earthquakes with both strike-slip and normal-fault motions, have the potential to generate more effectively tsunamis when the rupture duration is ≥ 50 seconds and P-wave dominant periods have values of 𝑇d × 𝑇50ex≥ 10s.

Keywords

• tsunami-seismic parameters; p-wave dominant period; p-wave duration of more than 50 seconds; tsunami event validity; strike-slip
• normal-faulting earthquakes
• tsunami-seismic parameters
• p-wave dominant period
• p-wave duration of more than 50 seconds
• strike-slip