Major Earthquakes - 7.4 (7.2) Mag and 6.4 Mag near Hualien, Taiwan

In summary, a series of significant earthquakes struck near Hualien, Taiwan, with magnitudes of 7.4 (initially reported as 7.2) and 6.4. The tremors prompted concerns about potential damage and safety in the region, which is known for its seismic activity. Emergency services were activated to assess the impact and provide assistance to affected areas.
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M 7.4 - 18 km SSW of Hualien City, Taiwan​

https://earthquake.usgs.gov/earthquakes/eventpage/us7000m9g4/executive
  • 2024-04-02 23:58:11 (UTC)
  • 23.819°N 121.562°E
  • 34.8 km depth

M 6.4 - 11 km NE of Hualien City, Taiwan​

https://earthquake.usgs.gov/earthquakes/eventpage/us7000m9gc/executive
  • 2024-04-03 00:11:25 (UTC)
  • 24.064°N 121.672°E
  • 12.6 km depth
Many aftershocks reported along the east coast. Some buildings collapse, fatalities and injuries reported.

Three aftershocks registered 5.7 Mag NW of Hualien, in close proximity.
 
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Those tilted buildings are crazy.
 
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nsaspook said:
Those tilted buildings are crazy.
Yeah, but I'm actually really impressed. If the building tilts way over and does not collapse, that saves lives. From watching the news today, it sounds like building codes are pretty earthquake-aware in Taiwan, and the tilted buildings were built to older codes and not retrofitted (but still did pretty well considering how severe the earthquake magnitude was).
 
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berkeman said:
it sounds like building codes are pretty earthquake-aware in Taiwan
Indeed. This is a nice article about how Taiwan has been preparing for the inevitable earthquakes common in their region:

1712328352907.png


Hualien, Taiwan CNN —

Wu was preparing breakfast for guests at the small hotel he runs in Taiwan’s Hualien County when the shelves around him shook violently and the mountain behind his house roared.

Fearing the building would collapse, he rushed his guests to safety outdoors. Across the river, steep slopes were slipping from the mountains, the air swallowed by clouds of dust.

But Wu’s house suffered little damage from Wednesday’s 7.4 magnitude tremor, Taiwan’s most powerful in 25 years, something he attributes to a wider push to make the island more quake-resistant.

“Our government conducted a comprehensive review of building codes after the 1999 earthquake, and all buildings going up must use new technologies that make them more resilient to earthquakes,” he says.

Fifteen years ago when he started building his two-story guesthouse near the entrance to Taroko Gorge – a national park famed for its steep, marble-walled canyons – Wu had to get government approval of its earthquake-preparedness.

And experts say changes like this have helped the tremor-prone island avoid mass casualties in quakes like the one that hit on Wednesday.

“I feel very lucky,” says Wu of the remarkably low-level damage wrought by the massive quake. “It’s not too bad.”

<<snip>>
 
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FAQ: Major Earthquakes - 7.4 (7.2) Mag and 6.4 Mag near Hualien, Taiwan

1. What caused the major earthquakes near Hualien, Taiwan?

The major earthquakes near Hualien, Taiwan, were caused by the complex tectonic interactions in the region, primarily due to the convergence of the Philippine Sea Plate and the Eurasian Plate. This tectonic activity leads to significant stress accumulation along fault lines, ultimately resulting in earthquakes when the stress is released.

2. What were the magnitudes of the earthquakes that occurred?

The earthquakes that occurred near Hualien, Taiwan, had magnitudes of 7.4 (initially reported as 7.2) and 6.4. These magnitudes indicate strong seismic events capable of causing considerable damage, especially in populated areas.

3. How deep were the earthquakes, and does depth affect their impact?

The depth of the earthquakes plays a crucial role in their impact. Shallower earthquakes tend to cause more damage at the surface than deeper ones. The specific depths of these earthquakes can vary, but generally, shallower depths (less than 10 km) are associated with more intense shaking and potential for damage.

4. What areas were affected by these earthquakes?

The areas most affected by the earthquakes near Hualien, Taiwan, included the city of Hualien itself and surrounding regions. The intensity of shaking and potential for damage would have varied depending on proximity to the epicenter and local geological conditions.

5. What measures can be taken to prepare for future earthquakes in this region?

To prepare for future earthquakes, residents and local authorities can implement several measures, including strengthening building codes to ensure structures can withstand seismic activity, conducting regular earthquake drills, creating emergency response plans, and investing in early warning systems to provide timely alerts to the population.

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