On 2 April 2024, the MW 7.4 Hualien earthquake struck eastern Taiwan, representing the largest seismic event in the region since 1951. Located in the northern sector of the Longitudinal Valley, an area of high geodetic strain (>1 μstrain/yr), the earthquake initiated at a hypocentral depth of 40 km (USGS) and was followed by a MW 6.5 aftershock 13 minutes later. The event was associated with reverse faulting consistent with crustal contraction rates of ~30 mm/yr along the eastern Taiwan coast. The seismotectonic complexity of the region, influenced by the interplay of the Ryukyu Trench, collision, and subduction, involves two major fault systems: the east-dipping Longitudinal Valley Fault (LVF) and the west-dipping Central Range Fault (CRF).
Fault model of the 2024 Mw 7.4 Hualien (eastern Taiwan) earthquake sequence from GNSS and InSAR data
R. Caputo;
2025
Abstract
On 2 April 2024, the MW 7.4 Hualien earthquake struck eastern Taiwan, representing the largest seismic event in the region since 1951. Located in the northern sector of the Longitudinal Valley, an area of high geodetic strain (>1 μstrain/yr), the earthquake initiated at a hypocentral depth of 40 km (USGS) and was followed by a MW 6.5 aftershock 13 minutes later. The event was associated with reverse faulting consistent with crustal contraction rates of ~30 mm/yr along the eastern Taiwan coast. The seismotectonic complexity of the region, influenced by the interplay of the Ryukyu Trench, collision, and subduction, involves two major fault systems: the east-dipping Longitudinal Valley Fault (LVF) and the west-dipping Central Range Fault (CRF).I documenti in SFERA sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
