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Posts Tagged ‘Hualian quake’

Another Strong Quake Strikes Taiwan

Posted by feww on December 19, 2009

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


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

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

Historic Seismicity [7+ shocks sine 1900] – USGS

neic_jabu_7

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Related Links:

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