Northern Miyagi Earthquakes

Earthquake Research Institute, The University of Tokyo
Special Event Page - 2003/07/26 Northern Miyagi Earthquakes -

[Japanese]

Overview

A series of strong earthquakes (JMA intensities are larger than 5-) occured on the period from July 26 to 28. The list of earthquakes is as follows.

The list of Earthquakes *Mj stands for JMA rapid solution: July 26, 00:13 (JT) (Mj 5.5*); July 26, 07:13 (JT) (Mj 6.2); July 26, 10:22 (JT) (Mj 4.8*); July 26, 16:56 (JT) (Mj 5.3*); July 28, 04:08 (JT) (Mj 5.0)

There is an active fault named "Asahiyama flexure", which has North-South strike, around the focal area. It is possible that this fault caused these earthquakes. Now field surveys are being carried out.

From Active faults in Japan (Univ. Tokyo Press)

EIC Seismological Note No. 137: 2003/07/26 Northern Miyagi Earthquakes

A: 2003/07/26 00:13(JT) 38.43N 141.17E 11km 5.5

B: 2003/07/26 07:13(JT) 38.40N 141.20E 12km 6.2

C: 2003/07/26 16:56(JT) 38.50N 141.20E 12km 5.3
Moment tensor solutions determined by GRiD MT[2003/08/06] Updated

[Update 2003.08.06]

CONTENTS
Individual information of earthquakes
Seismicity
Links

Individual information of earthquakes

2003/07/26 00:13(JT) Mj=5.5 Northern Miyagi Earthquake

CMT Solution

Wave Form Record

Wave form recorded by Jarray
Wave form collected by satellite telemetry system

2003/07/26 10:22(JT) Mj=4.8 Northern Miyagi Earthquake

Intensity

Intensity information (To JMA site) in Japanese

Source Information

Moment tensor solution determined by GRiD MT
Moment tensor solution by NIED

Wave Form Record

Wave form recorded by Jarray
Wave form collected by satellite telemetry system

2003/07/26 16:56(JT) Mj=5.3 Northern Miyagi Earthquake

Intensity

Intensity information (To JMA site) in Japanese

Source Information

EIC Seismological Note No.137(C)
Moment tensor solution determined by GRiD MT
Moment tensor solution by NIED

Wave Form Record

Wave form recorded by Jarray
Wave form collected by satellite telemetry system

2003/07/28 04:08(JT) Mj=5.0 Northern Miyagi Earthquake

Intensity

Intensity Information (To JMA site) in Japanese

Source Information

Moment tensor solution determined by GRiD MT

Wave Form Record

Wave form collected by satellite telemetry system

Seismicity

Seismicity (2000/1/1-2003/07/24) (JMA)
Main shock and aftershocks (To NIED site)

Links

2003/05/26 MIYAGI-Oki Earthquake (Mj 7.0)

[Earthquake Research Institute]

Intensity

Source information

CMT Solution

Wave Form Record

Intensity

Source Information

CMT Solution

Wave Form Record

Intensity

Source Information

Wave Form Record

Intensity

Source Information

Wave Form Record

Intensity

Source Information

Wave Form Record