5 May 2014 M W  6.1 Mae Lao (Northern Thailand) Earthquake: Interpretations of Recorded Ground Motion and Structural Damage | Zendy

Ornthammarath Teraphan | Zendy; Warnitchai Pennung | Zendy

Open Access

5 May 2014 M W 6.1 Mae Lao (Northern Thailand) Earthquake: Interpretations of Recorded Ground Motion and Structural Damage

Author(s) -

Ornthammarath Teraphan,

Warnitchai Pennung

Publication year - 2016

Publication title -

earthquake spectra

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.134

H-Index - 92

eISSN - 1944-8201

pISSN - 8755-2930

DOI - 10.1193/081814eqs129m

Subject(s) - seismology , ground motion , geology , strong ground motion , foreshock , peak ground acceleration , seismic microzonation , aftershock

A moderate left-lateral strike-slip earthquake of M W 6.1 occurred on 5 May 2014 in northern Thailand, causing damage to the town of Mae Lao and nearby municipalities. Based on an instrumental earthquake catalog, the Mae Lao earthquake is the second largest earthquake in modern Thai history after the M W 6.3 Nan earthquake in 1935. In this study, the strong-motion records from the epicentral area are analyzed in order to investigate the characteristics of the ground motions. In addition, post-earthquake field observations and statistics for typical structural damage in the affected area, such as the soft story effect and the shear failure of columns, are summarized. Besides major structural damage, the majority of structures in the epicentral area withstood the strong motion, which could be due to the low stress drop of the main shock (40 bars) leading to below average ground motions for an M W 6.1 earthquake.

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