Categorized | Earthquake, News

Weak 3.8M quake shakes Big Island Friday night (Jan 23), no tsunami threat

Epicenter of 10:30 p.m. Friday, January 23, 2015 quake. Map courtesy of USGS.

Epicenter of 10:30 p.m. Friday, January 23, 2015 quake. Map courtesy of USGS.

If you felt this quake you can make a report to the USGS/HVO via a form here.

Seismograph in Hilo recorded the event in the bottom left of this recording. Courtesy USGS

Seismograph in Hilo recorded the event in the bottom left of this recording. Courtesy USGS

Magnitude
3.8

Event Time
2015-01-24 08:30:21 (UTC)
2015-01-23 22:30:21 HAST

Nearby Cities
18km (11mi) SE of Volcano, Hawaii
33km (21mi) SSW of Hawaiian Paradise Park, Hawaii
45km (28mi) S of Hilo, Hawaii
99km (62mi) ESE of Kailua-Kona, Hawaii
361km (224mi) SE of Honolulu, Hawaii

TSUNAMI SEISMIC INFORMATION STATEMENT
NWS PACIFIC TSUNAMI WARNING CENTER/NOAA/NWS
ISSUED BY NWS NATIONAL TSUNAMI WARNING CENTER PALMER AK
1035 PM HST FRI JAN 23 2015

TO – CIVIL DEFENSE IN THE STATE OF HAWAII

SUBJECT – LOCAL TSUNAMI INFORMATION

THIS MESSAGE IS FOR INFORMATION ONLY. NO ACTION REQUIRED.

AN EARTHQUAKE HAS OCCURRED WITH THESE PRELIMINARY PARAMETERS

ORIGIN TIME – 2230 HST JAN 23 2015
COORDINATES – 19.4 NORTH 155.2 WEST
DEPTH – 13 KM
LOCATION – 25 MILES SW OF HILO HAWAII
MAGNITUDE – 3.6

EVALUATION

NO TSUNAMI IS EXPECTED. REPEAT. NO TSUNAMI IS EXPECTED

THIS WILL BE THE ONLY MESSAGE ISSUED FOR THIS EVENT UNLESS
ADDITIONAL DATA ARE RECEIVED.

USGS: How large does an earthquake have to be to cause a tsunami?

Magnitudes below 6.5
Earthquakes of this magnitude are very unlikely to trigger a tsunami.

Magnitudes between 6.5 and 7.5
Earthquakes of this size do not usually produce destructive tsunamis. However, small sea level changes may be observed in the vicinity of the epicenter. Tsunamis capable of producing damage or casualties are rare in this magnitude range but have occurred due to secondary effects such as landslides or submarine slumps.

Magnitudes between 7.6 and 7.8
Earthquakes of this size may produce destructive tsunamis especially near the epicenter; at greater distances small sea level changes may be observed. Tsunamis capable of producing damage at great distances are rare in the magnitude range.

Magnitude 7.9 and greater
Destructive local tsunamis are possible near the epicenter, and significant sea level changes and damage may occur in a broader region.

Note that with a magnitude 9.0 earthquake, the probability of an aftershock with a magnitude exceeding 7.5 is not negligible. To date, the largest aftershock recorded has been magnitude 7.1 that did not produce a damaging tsunami.

One Response to “Weak 3.8M quake shakes Big Island Friday night (Jan 23), no tsunami threat”

  1. martina says:

    matthew 24:3,7 being fulfilled!! Jehovah God is about to bring THE END.

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