Another Strong Quake Strikes Taiwan

Strong earthquake measuring 6.7 Mw strikes off the coast of Taiwan

The M6.7 earthquake struck about 25 km (15 miles) SSE of Hua-lien, Taiwan, at a depth of about 40 km on Saturday 19 December 2009 at 13:02 UTC.

The quake’s epicenter was about 19 km NE of another similarly strong earthquake measuring up to 6.4 Mw which on October 4, 2009.

Earthquake Details

Summary from Japan Meteorological Agency (JMA) with data added from other sources:

• Magnitude:  6.7 Mw
• Region: TAIWAN
• Date time: 2009-12-19 at 13:02:16.9 UTC
• Location: 23.87 N ; 121.66 E
• Depth: 40 km
• Distances
  • 15 km SE Hualian (pop 108,286 ; local time 21:02 2009-12-19)
  • 27 km NE Fenglin (pop 12,763 ; local time 21:02 2009-12-19)

Recent History of seismicity in the region

• On July 13, 2009 Fire Earth said:  A Magnitude 6.3 earthquake occurred near east coast of Taiwan.
• On August 17, 2009: Fire Earth wrote:  Magnitude 6.8 Quake Strikes Ryukyu Islands, Japan

Earthquake location Map. Source: European-Mediterranean Seismological Center

Details from USGS/EHP

• Magnitude: 6.4 [Systematically downgraded from 6.7 Mw by USGS/EHP]
• Date-Time:
  • Saturday, December 19, 2009 at 13:02:16 UTC
  • Saturday, December 19, 2009 at 09:02:16 PM at epicenter
• Location: 23.763°N, 121.689°E
• Depth: 44.6 km (27.7 miles)
• Region TAIWAN
• Distances
  • 25 km (15 miles) SSE of Hua-lien, Taiwan
  • 95 km (60 miles) S of Su-ao, Taiwan
  • 110 km (70 miles) ESE of T’ai-chung, Taiwan
  • 145 km (90 miles) S of T’AI-PEI, Taiwan
• Location Uncertainty horizontal +/- 5.7 km (3.5 miles); depth +/- 7.4 km (4.6 miles)
• Parameters NST= 73, Nph= 73, Dmin=47.2 km, Rmss=1.19 sec, Gp= 40°,
• M-type=teleseismic moment magnitude (Mw), Version=7
• Source: USGS NEIC (WDCS-D)
• Event ID us2009qjar

Seismic Hazard Map – USGS

Major Tectonic Boundaries: Subduction Zones -purple, Ridges -red and Transform Faults -green

Historic Seismicity [7+ shocks sine 1900] – USGS

Related Links:

• A Magnitude 6.3 earthquake occurred near east coast of Taiwan
• 4th Powerful Quake Strikes Japan Region
• Earthquake Forecast: Tokyo, Japan
• Magnitude 6.8 Quake Strikes Ryukyu Islands, Japan

• FEWW Earthquake Links
• Volcanoes
• FEWW Volcano Links

Magnitude 6.3 quake strikes Taiwan region

Strong Quake Strikes Taiwan – March 4

FOR March 4, 2010 Quake in Taiwan Click the Link ABOVE

A Magnitude 6.3 earthquake occurred near east coast of Taiwan.

A Magnitude 6.3 mainshock followed by a M5.1 aftershock struck about 60km east of the coastal town of Hua-lien, Taiwan, at a depth of 24.7 km, USGS reported.

The quake occurred about 40km east of an unnamed volcano [Volcano Number: 0801-03= ; Latitude: 24.00°N,  Longitude: 121.83°E] where according to the Global Volcanism Program:

A submarine eruption observed by the U.S. Navy boat “Southampton” took place on October 29, 1853 in the Philippine Sea offshore from the city of Hualien about 18 km from the eastern coast of Taiwan. Several days later another ship, the “Macedonian,” passed the same location and reported white ash covering its curtains.

Subject to further seismic activity in the area FEWW will publish the probability of eruption at volcano 0801-03.

10-degree Map Centered at 25°N,120°E

Earthquake location. Original Map: USGS

Earthquake Details:

• Magnitude: 6.3
• Date-Tim:
  • Monday, July 13, 2009 at 18:05:02 UTC
  • Tuesday, July 14, 2009 at 02:05:02 AM at epicenter

• Location:  23.997°N, 122.177°E
• Depth:  24.7 km (15.3 miles)
• Region:  TAIWAN REGION
• Distances:
  • 60 km (40 miles) E of Hua-lien, Taiwan
  • 75 km (45 miles) SSE of Su-ao, Taiwan
  • 135 km (85 miles) SSE of T’AI-PEI, Taiwan
  • 150 km (95 miles) SE of Hsin-chu, Taiwan

• Location Uncertainty:  horizontal +/- 6.9 km (4.3 miles); depth +/- 20 km (12.4 miles)
• Parameters NST= 95, Nph= 95, Dmin=62.3 km, Rmss=0.72 sec, Gp= 50°, M-type=teleseismic moment magnitude (Mw), Version=6
• Source:  USGS NEIC (WDCS-D)
• Event ID: us2009jabu
  

Seismic Hazard Map – USGS

Major Tectonic Boundaries: Subduction Zones -purple, Ridges -red and Transform Faults -green

Historic Seismicity [7+ shocks sine 1900] – USGS

Major Tectonic Boundaries: Subduction Zones -purple, Ridges -red and Transform Faults -green

Related Links:

• FEWW Earthquake Links
• Volcanoes
• FEWW Volcano Links