Presenter: Meng-Hsuan Shih
Date: 2017/03/09
A better real-time assessment of earthquake effects (i.e. seismic intensity estimation) is crucial for hazard mitigation. Especially during the aftermath of a disastrous event, significant reduction of loss can usually be realized through timely execution of emergency response measures. These effects include strong-ground shaking, ground failure, and their impact on man-made structures. The descriptive Modified Mercalli intensity scale, though still in common use in many poorly instrumented areas of the world, is out of date in areas of extensive strong-motion instrumentation. This speech will show two parts of discussion of seismic intensity estimation. In first part is using the seismic parameters of chi-chi earthquake to compare the situation of earthquake loss analysis. After they find four kinds of the parameters that give slightly higher correlation coefficients than other parameters, they discuss the intensity estimation with these four parameters. In second part is using the data of Costa Rican to establish regressions. After they compare regressions with previous studies, there is a fairly remarkable agreement between the PGAmax vs. MMI found in their study and the correlation calculated by Wald et al.
Reference
YIH-MIN WU, NAI-CHI HSIAO and TA-LIANG TENG. 2004. Relationships between Strong Ground Motion Peak Values and Seismic Loss during the 1999 Chi-Chi, Taiwan Earthquake. Natural Hazards 32: 357–373
Lepolt Linkimer. 2008. RELATIONSHIP BETWEEN PEAK GROUND ACCELERATION AND MODIFIED MERCALLI INTENSITY IN COSTA RICA. Revista Geológica de América Central, 38: 81-94