UPDATE at 8:51 AM PST
THE PACIFIC TSUNAMI WARNING CENTER REPORTS SMALL TSUNAMI WAVES HAVE BEEN REPORTED.
By Randy Economy
www.Economy4ABC.Blogspot.com
April 7, 2011
8:24 a.m.
Honshu, Japan
Here we go again. A 7.1 earthquake hit the northern island of Honshu, Japan just around a half hour ago.
A tsunami warning is NOW IN EFFECT.
The figure above shows a visual representation of the style of faulting (focal mechanism) derived from the estimated moment tensor. Shaded areas show quadrants of the focal sphere in which the P-wave first-motions are away form the source, and unshaded areas show quadrants in which the P-wave first-motions are toward the source. The dots represent the axis of maximum compressional strain (in black, called the "P-axis") and the axis of maximum extensional strain (in white, called the "T-axis") resulting from the earthquake.
THE PACIFIC TSUNAMI WARNING CENTER REPORTS SMALL TSUNAMI WAVES HAVE BEEN REPORTED.
www.Economy4ABC.Blogspot.com
April 7, 2011
8:24 a.m.
Honshu, Japan
Here we go again. A 7.1 earthquake hit the northern island of Honshu, Japan just around a half hour ago.
A tsunami warning is NOW IN EFFECT.
Earthquake Details
- This event has been reviewed by a seismologist.
| Magnitude | 7.1 |
|---|---|
| Date-Time |
|
| Location | 38.253°N, 141.640°E |
| Depth | 49 km (30.4 miles) |
| Region | NEAR THE EAST COAST OF HONSHU, JAPAN |
| Distances | 66 km (41 miles) E of Sendai, Honshu, Japan 114 km (70 miles) E of Yamagata, Honshu, Japan 116 km (72 miles) ENE of Fukushima, Honshu, Japan 330 km (205 miles) NNE of TOKYO, Japan |
| Location Uncertainty | horizontal +/- 13.1 km (8.1 miles); depth +/- 7.2 km (4.5 miles) |
| Parameters | NST=426, Nph=427, Dmin=358.4 km, Rmss=0.75 sec, Gp= 32°, M-type=regional moment magnitude (Mw), Version=B |
| Source | |
| Event ID | usc0002ksa |
NEAR EAST COAST OF HONSHU, JAPAN
11/04/07 14:32:41
Epicenter: 38.252 141.639
MW 7.1
USGS/WPHASE CENTROID MOMENT TENSOR
11/04/07 14:32:41.00
Centroid: 38.252 142.039
Depth 49 No. of sta: 35
Moment Tensor; Scale 10**19 Nm
Mrr= 5.92 Mtt=-1.85
Mpp=-4.06 Mrt=-1.43
Mrp=-0.44 Mtp=-1.22
Principal axes:
T Val= 6.17 Plg=80 Azm=172
N = -1.48 8 26
P = -4.70 5 295
Best Double Couple:Mo=5.6*10**19
NP1:Strike= 17 Dip=40 Slip= 77
NP2: 213 51 101
The figure above shows a visual representation of the style of faulting (focal mechanism) derived from the estimated moment tensor. Shaded areas show quadrants of the focal sphere in which the P-wave first-motions are away form the source, and unshaded areas show quadrants in which the P-wave first-motions are toward the source. The dots represent the axis of maximum compressional strain (in black, called the "P-axis") and the axis of maximum extensional strain (in white, called the "T-axis") resulting from the earthquake.
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- BREAKING: 6.5 Earthquake hits near East Coast of Honshu. Tsunami Warning Issued for MIYAGI -KEN OKI Region (economy4abc.blogspot.com)
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