Seismo-Watch Archive of
Large Moment Magnitude (Mw) Earthquakes

August 1991
Total Number of Mw >6.0 Earthquakes per Month = 9
Cumulative Number of Mw >6.0 Earthquakes per Year = 80

Total Number of Mw >7.0 Earthquakes per Month = 1
Cumulative Number of Mw >7.0 Earthquakes per Year = 12

Date

Time

Lat

Lon

Depth

Mw
Loction**
Aug 5

605

21.36S

174.39W

309

6.0*
Aug 6

1449

35.72N

141.04E

285

6.0
Aug 8

0209

00.97N

122.63E

124

6.7
Aug 14

1253

54.38N

169.29W

274

6.0
Aug 14

1915

13.59S

167.60E

138

6.5*
Aug 15

1335

16.06S

168.01E

170

6.3*
Aug 16

2226

41.69N

125.38W

100

6.4
Aug 17

1929

40.23N

124.34W

120

6.3
Aug 27

2217

41.82N

125.39W

135

7.1*
Source: U.S. Geological Survey, National Earthquake Information Center; Harvard Geophysical Observatory, Harvard University (magnitudes with " * " are HRV). ("**" = Physical locations are not available from these cataloges and will have to be hand entered at a future date.

Disclaimer and Limitations
All data are preliminary and subject to change. Much of the information, including time, date, location, depth and magnitude, are determined by automatic processing. Future analysis may develop changes in these data. This data may not be reproduced, in part or in full, or by any form, including re-fax or re-mail transmissions, without prior written authorization from Advanced Geologic Exploration.

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