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Posts Tagged ‘Japan earthquakes’

Strong Earthquake Strikes near Shimane Nuclear Power Plant, Japan

Posted by feww on April 8, 2018

Earthquake Registers ‘5 Upper’ on Local Intensity Scale  (1 – 7)

CMQ – 040802

Strong Earthquake Strikes 50km from Shimane Nuclear Power Plant

Magnitude: 5.6mw [USGS]
[M5.8, JMA]
35.262°N, 132.541°E [9km NNE of Oda, Japan]
7.9 km depth
2018-04-08 16:32:31 UTC

Shimane Nuclear Power Plant [35.538°N, 132.999°E]

The event occurred about 50 kms from the NPP [Shutdown after Fukushima.] A previously unknown geological fault was discovered close to the Shimane Nuclear Power Plant in 2006, according to reports.

The quake was felt throughout 14 prefectures: Shimane, Tottori, Okayama, Hiroshima, Ehime, Hyogo, Kagawa, Kochi, Shiga, Kyoto, Osaka, Tokushima, Nara, and Wakayama.

Posted in News Alert | Tagged: , , , | Leave a Comment »

Japan Earthquake Forecast

Posted by feww on February 14, 2012

Japan Region Earthquakes: Currently Valid Forecasts by FIRE-EARTH

A Note to Seismologists at Tokyo University and Tohoku University, Japan



Staff at Research Center for Prediction of Earthquakes & Volcanic Eruptions, Graduate School of Science, Tohoku University are strongly advised to focus on probability of the next major earthquake in China.

Related Links:


Large Earthquake Could Strike Tokyo Area

Megaqauke measuring up to 9.2Mw could strike Tokyo / Chiba Area:  FIRE-EARTH Forecast [Posted by feww on March 16, 2011]

Details of Earthquake Forecast:

  • Magnitude: 8.8Mw [Uncertainty= ±0.4Mw]
  • Location: 50 – 150km radius of Tokyo Bay Area
  • Depth: 24km [Uncertainty= N/A]
  • Occurrence Time:
    • Between now and November 2011 [Probability = 0.70]
    • Between December 2011 and October 2012 [Probability = 0.64]
    • Between November 2012  and December 2016 [Probability = 0.78]

Tokyo University Seismologists

70% chance of big Tokyo earthquake ‘within 4 yrs’

The Yomiuri Shimbun —  There is a 70 percent probability the Tokyo metropolitan area will be hit directly by a strong earthquake of magnitude-7 level within four years, according to data compiled by a University of Tokyo research team.

The preliminary calculations conducted by a team from the university’s Earthquake Research Institute were based on intensified seismic activity in the area after the Great East Japan Earthquake on March 11.

The findings are more dire than a similar estimate by the central government’s Headquarters for Earthquake Research Promotion, which states there is a 70 percent chance a quake of the same scale will hit the southern Kanto region, including the metropolitan area, within 30 years.

The central government’s Central Disaster Management Council assumes 18 different hypocenters of magnitude-7 level earthquakes, such as in southern Ibaraki Prefecture and the Tachikawa fault zone.

If a magnitude-7.3 earthquake occurs directly under northern Tokyo Bay, as many as 11,000 people are expected to die and about 850,000 buildings to be rendered totally unusable or destroyed by fire.

According to the Meteorological Agency’s observations, after the March 11 disaster, earthquakes of magnitude 3 to 6 occurred an average of 1.48 times a day in the metropolitan area through December. This was about five times the pre-disaster average.

Prof. Naoshi Hirata of the university’s research institute and others based their calculations on the rule of thumb that the frequency of earthquakes is inversely proportional to their strength. For every increase in magnitude of one, the frequency of their occurrence falls by 90 percent.

The metropolitan area was hit by the magnitude-8 level Great Kanto Earthquake in 1923. Five weaker but still serious earthquakes of magnitude-7 level also hit an area extending from southern Ibaraki Prefecture to the Uraga Channel over a period of about 120 years.

The government’s earthquake headquarters obtained its quake estimate data based on the intervals of these quakes in the past. The data did not incorporate the increased seismic activity after the March 11 disaster.

Experts believe seismic activity in the metropolitan area has been intensified by changes in the movements of the Earth’s crust since March 11.

“Intensified seismic activity will continue from several to 10 more years,” Hirata said. “It’s highly probable a strong quake with a magnitude of about 7 will occur during that time.  (Jan. 24, 2012)

Posted in Japan earthquake forecast, tokyo earthquake, tokyo earthquake forecast | Tagged: , , , , , , , , , , , , | 1 Comment »

6th Strong Quake Strikes Near Ryukyu Isles, Japan

Posted by feww on September 29, 2009

6 to 8 more EQs may yet strike region

Magnitude 5.9 quake strikes near Ryukyu Islands, close to Iwo-Tori-Shima Volcano

Strong earthquake measuring 5.9 Mw struck near Ryukyu Islands, Japan region, at a depth of 10 km on September 28, 2009 at about 19:23 UTC, USGS EHP reported.

The quake struck about 200 km (125 miles) north of Naha, Okinawa, Japan. Japan Meteorological Agency reported an aftershock measuring 4.3 Mw at 07:48 local time (22:48 UTC). JMA issued NO tsunami warning after the mainshock.

This quake was in line with FEWW forecast made on August 17, 2009.

10-degree Map Centered at 30°N,130°E

Magnitude 5.9 - RYUKYU ISLANDS 28 sep 2009
Earthquake Location Map. Source of the original map: USGS. Map enhanced by FEWW.

Earthquake Details:

  • Magnitude: 5.9
  • Date-Time: Monday, September 28, 2009 at 19:22:57 UTC  [Tuesday, September 29, 2009 at 04:22:57 AM at epicenter]
  • Location: 27.943°N, 127.867°E
  • Depth: 10 km (6.2 miles) set by location program
  • Distances:
    • 200 km (125 miles) N of Naha, Okinawa, Japan
    • 480 km (300 miles) SSW of Kagoshima, Kyushu, Japan
    • 535 km (335 miles) NE of Ishigaki-jima, Ryukyu Islands, Japan
    • 1410 km (880 miles) SW of TOKYO, Japan
  • Location Uncertainty:  horizontal +/- 7.1 km (4.4 miles)
  • Source: USGS NEIC (WDCS-D)
  • Event ID:  us2009mcbr

Related Links:

Posted in Japan earthquake foecast, Japan quakes, Japan quakes 2009, Ryukyu Islands, Taiwan, tokyo quake forecast, tsunami warning | Tagged: , , , , , | 1 Comment »

FEWW Earthquake WARNING: JAPAN Region

Posted by feww on September 4, 2009

FEWW Earthquake Warning:

Large Earthquake Forecast in Japan Region

A large earthquake east of Honshu, Japan Region,  may be imminent (in the next few hours).

10-degree Map Centered at 35°N,140°E

latest quakes in Japan 04-09-09 -- 02-30-29 UTC
Location Map of latest earthquakes in Japan. Source: USGS

Related Links:

Posted in earthquake warning Honshu, large earthquakes, Tokyo Bay earthquake, tokyo earthquake | Tagged: , , , | 3 Comments »

4th Powerful Quake Strikes Japan Region

Posted by feww on August 17, 2009

Magnitude 6.8 Quake Strikes Ryukyu Islands, Japan

FEWW Moderators had predicted more powerful earthquakes in the region last week, and now believe as many as 10 additional magnitude 6+ quakes could yet strike the region in coming weeks

Volcanic Activity Forecast

FEWW Moderators also believe there is a strong probability (0.8+) that the submarine Unnamed Volcano located East of Taiwan at 24.00N, 121.83E could erupt in 2009. [See previous comment.]

This Earthquake:
Japan Meteorological Agency (JMA) reported the EQ details as follows

Earthquake Information
Occurred at: 09:06 JST 17 Aug 2009 [00:10UTC]
Latitude: 23.2N
Longitude: 123.8E
Depth:  about 10km
Magnitude: 6.8

Source: Japan Meteorological Agency (JMA). Image may be subject to copyright.

JMA issued the following tsunami warning:

Tsunami Information NUMBER 2  (High Tide Time and Estimated Tsunami Arrival Time at each place)

Issued at 09:10 JST 17 Aug 2009 [00:10 UTC]

High Tide Time and Estimated Tsunami Arrival Time at each place
Pay attention carefully in case a tsunami comes with a high tide and becomes higher.

Tsunami Forecast Region/ Tsunami Observation Site:

High Tide Time /Estimated Tsunami Arrival Time:

Iriomotejima 18:03 JST 17 Aug (*1)
Yonagunijima Kubura 18:06 JST 17 Aug 09:20 JST 17 Aug
Ishigakijima Ishigaki-ko 18:00 JST 17 Aug 09:30 JST 17 Aug
Miyakojima Hirara 17:55 JST 17 Aug 09:50 JST 17 Aug

[*1 mark: It is estimated that a tsunami has already arrived there.]

Tsunami Warning/Advisory

No tsunami damage at some of the other coasts though there may be slight sea level changes.


Meanwhile, USGS Earthquake Hazard Program reported the event as measuring 6.7Mw.

Earthquake Location Map. Source: USGS

Related Links:

Posted in Ishigaki-jima, ISHIGAKIJIMA KINKAI, Ryukyu Islands quake, Taiwan, tokyo quake | Tagged: , , | 12 Comments »