The magnitude of the 5.9-magnitude earthquake on October 11

[Reporter Chen Xinyu/Taipei Report] The scale 5 occurred only in the coastal waters of Hualien County at 8:17 the night before yesterday.

Three earthquakes, separated by about seven hours, are Huadong Waihai and have a scale of five.

The 9th earthquake has caused people to worry that it may be a "foreshock", and that there may be a larger-scale main shock in the follow-up, just like the 918th earthquake, Chen Guochang, director of the Earthquake Prediction Center of the Central Meteorological Administration, said, 5.

The Jiuquan earthquake is not a foreshock, and it has nothing to do with the Taitung Chishang 918 earthquake.

More than five aftershocks.

Aftershocks above 4.5 must be noticed within 2 days

Due to the scale of Taitung Chishang on September 18 this year.

Before the eighth earthquake, there was a scale six in Guanshan, Taitung County the night before.

Four earthquakes, some people worry that this is also a foreshock, and there may be a larger main shock in the follow-up, Chen Guochang emphasized that this five.

Nine earthquakes are the main shocks.

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Chen Guochang said, five.

The epicenter of the nine earthquakes is between the Nan'ao Basin, the Heping Basin, and the Okinawa Island Arc. The cause of the earthquake should be "caused by subsidence-type extrusion". The initial location of the epicenter is the accretionary rock mass where the plate is about to subside and pull, causing the arc The collapse of the front basin, the deformation and rupture caused by the extrusion, and frequent earthquakes in this area, this can be said to be a background earthquake, and the public need not worry too much.

The epicenter of this earthquake was close to the March 31 earthquake in 2002, which was six in scale.

The eighth earthquake caused the boom of a large tower crane in the 101 Building under construction to be broken and fell to the ground, causing death and injury.

Yesterday, many people woke up and shouted, "Shuangbei feels more than three levels." Chen Guochang explained that it may be because people woke up from their sleep and felt more obvious.

Chen Guochang said that earthquakes have indeed been relatively frequent since this year, and the same area rarely has a scale of 6.6 within a year.

○ (January 3), February 12 Scale 5.

Six, yesterday morning five.

Nine Earthquakes.

The three larger earthquakes had similar causes, but were separate sequences.

This year the size of the district exceeds five.

There have been three cases above five, more than in previous years.