Magnitude 6.8 earthquake strikes Eastern Honshu, Japan about 25 km ENE of Morioka
The quake caused substantial damage to buildings, collapsed power lines and left as many as 10,000 homes and businesses without electricity.
Cars were buried in a landslide, according to local news reports, and the tremor triggered dozens of fires. Fujitsu Ltd. in Iwate reported that its “semiconductor production machines were partially damaged.”
About 130 people needed hospital treatment, thousands more trapped in stranded trains, motorways closed and train services canceled. the tremor was felt widely in southern Hokkaido and in the main island of Honshu as far south as Tokyo.
According to witness reports, the quake caused strong shaking lasting up to 40 seconds in areas near the epicenter in northern Japan.
Japan sits atop the Eurasian, Pacific, Philippine and North American tectonic plates whose movements cause numerous earthquakes. The country experiences about 20 percent of the world’s major earthquakes of magnitude 6 or greater.
People clean up the pieces of glasses shattered by a strong earthquake at an auto dealership in Karumai, Iwate prefecture Thursday, July 24, 2008. A strong earthquake with a preliminary magnitude of 6.8 struck off the northern Japanese coast early Thursday, injuring at least 91 people, causing blackouts and landslides, officials said. (AP Photo/Kyodo News). Image may be subject to copyright. See FEWW Fair Use Notice!
Did you know?
With a total of 203 earthquakes measuring 6.0 Mw or greater, 1995 experienced the largest number of quakes for the period 1980 to 2007 [2007 was runner up with 195 large quakes.] With a total of 110 quakes so far [as of July 23,] 2008 could prove a record-breaking year for large tremors. [The stats are based on USGS data.]
Historic Seismicity


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

Major Tectonic Boundaries: Subduction Zones -purple, Ridges -red and Transform Faults -green [USGS]
Quake Details:
– Magnitude: 6.8
– Date-Time: Wednesday, July 23, 2008 at 15:26:20 UTC [Thursday, July 24, 2008 at 12:26:20 AM at epicenter]
– Location: 39.807°N, 141.467°E
– Depth: 111 km (69.0 miles) set by location program
– Region: EASTERN HONSHU, JAPAN
– Distances:
- 30 km (20 miles) ENE of Morioka, Honshu, Japan;
- 75 km (50 miles) S of Hachinohe;
- 120 km (75 miles) E of Akita;
- 485 km (300 miles) NNE of TOKYO
– Location Uncertainty: horizontal +/- 3.8 km (2.4 miles); depth fixed by location program
The Mainshock was followed by a magnitude 5.1 aftershock almost exactly 11 hours later at 11:27:42 AM (time at epicenter).
Location of aftershock: 39.576°N, 141.385°E
Depth: 10 km (6.2 miles) set by location program
Distance: 25 km (15 miles) SE of Morioka, Honshu, Japan [455 km NNE of TOKYO]
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