Large Moment Magnitude (Mw) Earthquake Archive


April 1990


Total Number of Mw >6.0 Earthquakes per Month = 16

Cumulative Number of Mw >6.0 Earthquakes per Year = 44



Total Number of Mw >7.0 Earthquakes per Month = 2

Cumulative Number of Mw >7.0 Earthquakes per Year = 5

?
Date

Time

Lat

Lon

Depth

Mw

? Location
Apr 03

0733

5.84S

147.66E

88.2

6.2

Apr 03

2257

11.42N

86.30W

525

6.8

*

Apr 05

2112

15.12N

147.59E

116

7.6

MARIANA IS. REGION
Apr 06

1457

15.17N

147.59E

155

6.3

MARIANA IS.
Apr 09

0931

58.06S

176.05W

174

6.0

*

Apr 11

2051

35.47N

135.45E

362

6.1

Apr 17

5933

39.43N

74.90E

33

6.0

S. XINJIANG, CHINA
Apr 18

1339

1.18N

122.85E

257

7.8

*

MINAHASSA PENINSULA
Apr 19

0105

1.30N

123.02E

330

6.0

*

Apr 19

1240

1.10N

123.42E

237

6.5

Apr 21

1854

36.98S

73.30W

119

6.3

CENTRAL CHILE
Apr 26

0937

36.04N

100.27E

100

6.3

QINGHAI PROVINCE, CHINA
Apr 26

0937

35.98N

100.24E

81

6.5

*

QINGHAI PROVINCE, CHINA
Apr 26

1540

1.05N

122.82E

244

6.2

Apr 28

0123

8.88N

83.50W

227

6.4

*

COSTA RICA
Apr 30

0554

54.27S

1.27E

100

6

*

Source: U.S. Geological Survey, National Earthquake Information Center; Harvard Geophysical Observatory, Harvard University (magnitudes with " * " are HRV).

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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