Earthquakes

Magnitude 5+ Earthquakes – Global

5.3 Earthquake hits Fiji.

5.3 Earthquake hits the southwest Indian Ridge.

Earthquakes

Magnitude 5+ Earthquakes – Global

7.0 Earthquake hits the South Atlantic Ocean.

6.1 Earthquake hits the Kuril Islands.

5.6 Earthquake hits the Iran-Iraq border region.

5.5 Earthquake hits the Falkland Islands.

5.4 Earthquake hits the South Atlantic Ocean.

5.3 Earthquake hits Sakhalin, Russia.

5.2 Earthquake hits the Falkland Islands.

5.2 Earthquake hits Fiji.

5.0 Earthquake hits the Indian Ocean triple Junction.

5.0 Earthquake hits the Solomon Islands.

5.0 Earthquake hits near the east coast of Kamchatka, Russia.

5.0 Earthquake hits Java, Indonesia.

5.0 Earthquake hits offshore Guatemala.

Earthquakes

Magnitude 5+ Earthquakes – Global

5.5 Earthquake hits Vanuatu.

5.3 Earthquake hits the Izu Islands off Japan.

5.1 Earthquake hits Fiji.

5.0 Earthquake hits the Hindu Kush, Afghanistan.

New Theory on Major Earthquakes

A widely accepted theory about earthquakes has received a shakeup.

A team of geologists studying the San Andreas fault near Los Angeles found that bigger earthquakes aren’t necessarily preceded by longer periods of inactivity on the fault. The going wisdom about earthquakes is that the longer a fault goes without a major earthquake, the bigger the quake will be when it finally strikes. The theory seems particularly apt for the San Andreas fault, which marks the boundary between two tectonic plates. As the Pacific plate moves northward relative to North America at about 4.5 cm per year, friction stops the fault from slipping. The longer that strain jacks up, the farther the plates will jolt when they finally let go and the larger the resulting earthquake will be. Or so the thinking went.

But a group found that the theory doesn’t hold up for the segment of the fault near the southern California town of Wrightwood.

The team’s analysis provided the most complete long-term record of activity for any fault in the world. And it contradicts the conventional wisdom: Shorter quiet periods of less than a century were generally followed by larger earthquakes, and longer periods of several hundred years preceded smaller quakes. Although this appears counterintuitive, the larger pattern is more logical. It appears that strain is not released entirely with each earthquake but continues to accumulate through four or five or more earthquake cycles. Finally, the strain is released by one big quake or a cluster of smaller shocks.

The authors caution that they don’t know yet if the activity at the Wrightwood fault segment is typical of the entire San Andreas fault or of faults in general. But if it is, the research could change the way scientists estimate the probability of earthquakes.

Earthquakes

Magnitude 5+ Earthquakes – Global

6.2 Earthquake hits Taiwan.

Initial reports one fatality and at least 18 injuries. The quake sent panicked residents dashing for the streets.

5.6 Earthquake hits Mindanao in the Philippines.

Reports of nine injuries with dozens of houses damaged.

5.5 Earthquake hits the Solomon Islands.

5.3 Earthquake hits New Guinea, Papua New Guinea.

5.1 Earthquake hits Fiji.

5.1 Earthquake hits south of Fiji.

5.0 Earthquake hits Luzon in the Philippines.

5.0 Earthquake hits near the coast of Nicaragua.

5.0 Earthquake hits the Santa Cruz Islands.

5.0 Earthquake hits south of Fiji.

4.9 Earthquake hits Eilat, Israel.

Earthquakes

Magnitude 5+ Earthquakes – Global

6.7 Earthquake hits the Sea of Okhotsk.

5.6 Earthquake hits the Timor Sea.

5.3 Earthquake hits eastern Uzbekistan.

5.3 Earthquake hits southern Peru.

5.2 Earthquake hits west of MacQuarrie Island.

5.1 Earthquake hits the southern Mid-Atlantic ridge.

5.0 Earthquake hits Fiji.

5.0 Earthquake hits off the east coast of Kamchatka, Russia.

Earthquakes

Magnitude 5+ Earthquakes – Global

6.6 Earthquake hits the Mariana Islands region.

6.2 Earthquake hits Mindanao in the Philippines.

6.0 Earthquake hits off the east coast of North Island, New Zealand.

5.5 Earthquake hits Fiji.

5.2 Earthquake hits Fiji.

5.0 Earthquake hits near the east coast of Honshu, Japan.

5.0 Earthquake hits the mid-Indian ridge.

Earthquakes

Magnitude 5+ Earthquakes – Global

5.8 Earthquake hits the Santa Cruz Islands.

5.7 Earthquake hits the Santa Cruz Islands.

5.4 Earthquake hits Fiji.

5.4 Earthquake hits northern Qinghai, China.

5.1 artificial earthquake hits North Korea at North Korea’s nuclear test site. The artificial tremor was a nuclear test. North Korea says it has successfully carried out its third underground nuclear test.

5.0 Earthquake hits the Santa Cruz Islands.

Earthquakes

Magnitude 5+ Earthquakes – Global

6.1 Earthquake hits eastern Kazakhstan.

5.0 and two 4,6 Aftershocks hit eastern Kazakhstan.

5.2 Earthquake hits south of Fiji.

4.9 Earthquake hits Sulawesi, Indonesia.

Earthquakes

4.7 Earthquake hits Fiji.

4.6 Earthquake hits the Solomon Islands.

No Earthquakes of 5.0 and larger during this period.

 

Earthquakes

5.3 Earthquake hits northern Iran.

5.1 Earthquake hits offshore El Salvador.

5.0 Earthquake hits the Fiji region.

4.9 Earthquake hits south-east of Easter island.

4.9 Earthquake hits Reykjanes Ridge in the mid-Atlantic.