Premium
Repeating earthquakes and seismic potential along the northern Longitudinal Valley fault of eastern Taiwan
Author(s) -
Rau RueyJuin,
Chen Kate Huihsuan,
Ching KuoEn
Publication year - 2007
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2007gl031622
Subject(s) - seismology , geology , slip (aerodynamics) , seismic hazard , fault (geology) , global positioning system , seismic gap , spatial distribution , geodesy , remote sensing , telecommunications , physics , computer science , thermodynamics
The northern Longitudinal Valley fault in eastern Taiwan creeps at the surface with a small rate of ∼1 cm/yr but slips in large earthquakes. To improve seismic hazard assessment, it is important to comprehend the slip deficit rate distribution at depth. We discovered 25 M L 2.1–4.6 repeating earthquakes in this area and inverted GPS measurements for producing an image of the along‐strike spatial distribution of deep fault slip rates. The repeating events are located at the depths of 10–22 km with 24.9–77.5 mm/yr slip rates, which are comparable with the GPS‐derived slip rates of 47.5 ± 5.8 mm/yr at similar depth ranges. Based on distribution of GPS‐derived slip deficits, since 1951, the northern Longitudinal Valley fault has become capable of releasing stored strain in a future M w = 7.3 earthquake.