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A strong magnitude 6.5 earthquake occurred at 16:20:53 (UTC) on Tuesday, June 03, 2008, in the Solomon islands region, 57 km West from Kira Kira, Solomon Islands, at a depth of 88 km.

Location 10.393S, 161.418E

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A strong magnitude 6.6 earthquake occurred at 11:50:01 (UTC) on Tuesday, November 27, 2007, in the Solomon islands region, 70 km SSE of Kira Kira, San Cristobal, Solomon Islands, at a depth of 41.6 km.

Location 11.021S, 162.166E

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A strong magnitude 6.7 earthquake occurred at 08:39:31 (UTC) on Wednesday, August 16, 2007, in the Solomon islands region, 57 km SW of Honiara, Solomon Islands, at a depth of 35 km.

Location 9.893S, 159.662E

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A strong magnitude 6.1 earthquake occurred at 01:45:31 (UTC) on Tuesday, May 1, 2007, in the Solomon Islands region, 132 km SSW from Arawa, Bougainville, Papua New Guinea, at a depth of 75 km.

Location 7.339S, 155.171E

A strong magnitude 6.1 earthquake occurred at 00:15:21 (UTC) on Tuesday, May 1, 2007, in the Solomon Islands region, 110 km SSW from Arawa, Bougainville, Papua New Guinea, at a depth of 10 km.

Location 7.139S, 155.119E



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Advanced Land Observing Satellite "Daichi": Switching to the Redundant Data Relay Satellite Communication Equipment and Emergency Observations of the Solomon Islands Following Earthquake

At around 2:26 p.m. on April 5, 2007 (Japan Standard Time, JST, (all date and times hereinafter are in JST,) the observation data relay from the Advanced Land Observing Satellite "Daichi" to the Data Relay Satellite "Kodama" was interrupted. The "Daichi" was launched in January 2006 by the Japan Aerospace Exploration Agency (JAXA.)
JAXA investigated the situation based on already acquired telemetry data, and at around 5:00 p.m. on April 8 the transmission system of the Daichi onboard data relay satellite communication equipment was switched to the redundant system to restore normal operations. We are continuing to study the cause of this phenomenon.
Observation data acquisition during the data transmission interruption was continuously performed by direct transmission between the Daichi and ground stations without relays. During that direct transmission period, at around 8:38 a.m. on April 8, JAXA conducted an emergency observation of the Solomon Islands Region. As a result of the data analysis, we were able to acquire image data of the areas stricken by the Solomon Island Earthquake.

Emergency Observation on the Solomon Islands Earthquake
At around 5:39 a.m. on April 2 (Japan Standard Time, JST, or at around 7:39 a.m. local time,) an 8.1 magnitude earthquake hit the Solomon Islands. The Japan Aerospace Exploration Agency (JAXA) performed emergency observations using the Advanced Land Observing Satellite "Daichi," and, as a result of the data analysis, we were able to acquire image data of disaster-stricken areas by the onboard observation equipment, AVNIR-2*1 and PALSAR*2.

daichi_1L
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Credit JAXA

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The force of this week's Solomons earthquake has lifted an island in the South Pacific archipelago and pushed out its shoreline by tens of metres, exposing surrounding reefs.
The remote island of Ranongga in the western Solomon Islands used to have submerged coral reefs that attracted scuba divers from around the world.

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A strong magnitude 6.4 earthquake occurred at 06:34:34 (UTC) on Wednesday, April 4, 2007, in the Solomon Islands region, 55km NW of Gizo, New Georgia Islands, at a depth of 10 km.

Location 7.774S, 156.489E

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A strong magnitude 6.0 earthquake occurred at 00:39:44 (UTC) on Wednesday, April 4, 2007, in the Solomon Islands region, 80km SW of Chirovanga, Choiseul, Solomon Islands, Solomon Islands, at a depth of 10 km.

Location 7.121S, 156.073E

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This image was captured by the Landsat-7 satellite, and shows the location of the earthquake epicentre in relation to the nearest islands in the Solomon Island group.
Gizo is beyond the left edge of the image, near to the triangular fringing coral reefs on the left edge.

solomons_sm
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Credit NASA

The earthquake occurred along the Australia/Woodlark/Solomon Sea plate boundary, where the plates slide beneath the denser Pacific plate. Friction between the sinking (subducting) plates and the overriding Pacific plate led to the large magnitude 8.1 earthquake on April 1.

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A second large earthquake is possible and more aftershocks are a certainty, warn scientists tracking Monday's Solomon Islands earthquake and tsunami.

"There could be another fairly large earthquake south or north" - Gary Gibson, seismologist at Environmental Systems and Services in Melbourne.

Geoscience Australia seismologist Spiro Spiliopoulos agreed that because the region where the magnitude-8.1 earthquake struck was "unpredictable", Solomon Islanders could not rest easy for the next few weeks.

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Thousands of people are seeking refuge in the highlands of Gizo island, after their homes were ruined in the Solomon Islands tsunami yesterday, and as at least 10 aftershocks rock the region.

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