GRCC seismometer records four magnitude 6 earthquakes this August

GRCC’s Calkins Science Center hosts a seismometer that’s part of the MIQuakes network, a group of Michigan high schools, community colleges and universities that host seismometers recording earthquake activity worldwide.

GRCC’s seismometer — GRMI — has picked up four earthquakes so far this month that were equal to or greater than magnitude 6:

On Aug. 5 at 11:46 a.m. Coordinated Universal Time, a magnitude 6.9 earthquake was generated near Pulau Lombok, Indonesia.  Our seismometer recorded the earthquake 20 minutes later — the red arrow shows the arrival of the primary wave:

Image of the seismometer recording of the August 5 earthquake near Indonesia.

On Aug. 12, GRMI picked up two earthquakes —  a magnitude 6.4 and 6 —  both from northern Alaska. The primary waves from the Alaska earthquakes only took six minutes to arrive at the GRMI station.

Image of the seismometer recording of two earthquakes on August 12 from northern Alaska.

Finally, on Aug. 15, a magnitude 6.6 earthquake shook the Tanaga Volcano in the Aleutian Islands and was picked up by GRMI 10 minutes later.

Image of the seismometer recording of the August 15 earthquake near the Aleutian Islands.

Mechanical cooling issue in Calkins Science Center

Facilities is currently addressing a mechanical cooling issue in Calkins Science Center. Parts to make repairs to the system are expected to arrive Friday morning, and repairs will commence the same day.

Stop-gap measures are being taken to the extent possible to control temperatures until repairs are made.  In the meantime, occupants may experience warm temperatures through the end of the week.

 

Hawaii earthquake recorded on Calkins Center Seismograph

The dramatic events taking place in Hawai`i manifested here in West Michigan as the GRCC seismometer (GRMI) recorded the magnitude 6.9 earthquake on the Big Island of Hawai`i. On May 1st, a series of earthquakes heralded an intrusion of magma into the lower flanks of Kilauea Volcano on the Big Island. Cracks and fissures opened in Leilani Estates, a subdivision close to the town of Pahoa, which was previously threatened by lava flows in 2014. On May 3rd, lava began erupting from fissures in Leilani estates and to date, have destroyed 35 homes and forced the evacuation of over a thousand residents. Earthquakes generated by this activity include the magnitude 6.9 earthquake, recorded by GRMI. This is the largest earthquake in Hawai`i since the 1975.

For more information about the earthquake go to the Incorporated Research Institutions for Seismology.

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