An earthquake alert sent out in Hualien County for an aftershock on Friday. CNA photo
Taipei, April 5 (CNA) Both the frequency and magnitude of seismic activity after the magnitude 7.2 earthquake that rocked Taiwan on Wednesday morning seem to be moderating, the Central Weather Administration (CWA) said Friday.
As of noon Friday, a total of 502 aftershocks had hit Taiwan, including two exceeding a magnitude of 6, and 18 ranging from magnitude 5 to 6, CWA data showed.
In the last 24 hours, there were just two earthquakes of magnitude 5 or above -- a 5.1 magnitude quake at 10:30 p.m. on Thursday, and a 5.3 magnitude quake at 2:35 a.m. on Friday -- according to the CWA.
Wu Chien-fu (吳健富), director of the CWA's Seismology Center, said that while there continued to be aftershocks as more energy was being released, they were becoming weaker.
The possibility of aftershocks between magnitudes 5 and 6 still existed, but a major earthquake exceeding magnitude 7.2 was unlikely, he said.
The magnitude 7.2 earthquake struck off the coast of Hualien County in eastern Taiwan at 7:58 a.m. Wednesday, leaving 10 dead, 13 missing and more than 1,000 injured as of 3 p.m. Friday.
There have been concerns following the earthquake that it could trigger strong temblors in other parts of the country.
One area of particular concern was Chiayi County in southern Taiwan, where the Meishan Fault is nearing its once-in-a-century activity cycle.
Wu acknowledged that possibility, explaining that decreased pressure in one area could indeed lead to increased pressure elsewhere, resulting in induced seismic activity, but he did not specifically address the Meishan Fault possibility.
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