A local seismogram of the major earthquake in the Pacific Ocean on August 19 2018.

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Leodian
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A local seismogram of the major earthquake in the Pacific Ocean on August 19 2018.

Postby Leodian » Sun 19 Aug, 2018 1:23 pm

A major earthquake of magnitude 8.2 (that is extremely high) has been reported to have occurred today (August 19 2018) deep below the Pacific Ocean close to Fiji and Tonga. Occurring so deep (about 348 miles depth) it seems to have caused no damage but was widely felt. The event has been recorded in a seismogram at the British Geological Survey earthquake measuring station at Haverah Park near Beckwithshaw, near north Leeds. Hoping it will be of interest I have added the station's very long period chart to about 11:24 a.m. today (August 19 2018). Very long period components usually indicate an event a long way away (the short period chart was normal). Tonga and Fiji are very far way away from Leeds but earthquake detectors easily record such events.
BGSVeryLongPeriodSeismogramHaverahParkNearLeedsAug192018..jpg
BGSVeryLongPeriodSeismogramHaverahParkNearLeedsAug192018..jpg (184.47 KiB) Viewed 953 times
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Brunel
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Re: A local seismogram of the major earthquake in the Pacific Ocean on August 19 2018.

Postby Brunel » Sun 19 Aug, 2018 8:38 pm

@ LEODIAN. I assume you have missed the decimal point (about 348 miles depth) should read 3.48 miles

Pacific Ocean/Max depth 10,994 m or in old money 6.8 miles
harrym1byt
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Re: A local seismogram of the major earthquake in the Pacific Ocean on August 19 2018.

Postby harrym1byt » Sun 19 Aug, 2018 9:28 pm

Brunel wrote:@ LEODIAN. I assume you have missed the decimal point (about 348 miles depth) should read 3.48 miles

Pacific Ocean/Max depth 10,994 m or in old money 6.8 miles


'The earthquake struck just after midday Sunday and was almost 560 kilometers deep, the USGS said.'

Beneath the ocean floor, much deeper. Had it been shallower, there would have been a tsunami.
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Leodian
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Re: A local seismogram of the major earthquake in the Pacific Ocean on August 19 2018.

Postby Leodian » Sun 19 Aug, 2018 9:31 pm

Brunel wrote:@ LEODIAN. I assume you have missed the decimal point (about 348 miles depth) should read 3.48 miles

Pacific Ocean/Max depth 10,994 m or in old money 6.8 miles


Hi Brunel :).

Sorry if I did not make it clear that the quake occurred at about 348 miles beneath the Pacific Ocean floor, so deep into the Earth.

Edit shortly after posting. Unknown to me harrym1byt's confirmatory post of the depth had already come in just as I posted mine.
A rainbow is a ribbon that Nature puts on when she washes her hair.

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Brunel
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Re: A local seismogram of the major earthquake in the Pacific Ocean on August 19 2018.

Postby Brunel » Mon 20 Aug, 2018 7:50 am

All sorted,
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tilly
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Re: A local seismogram of the major earthquake in the Pacific Ocean on August 19 2018.

Postby tilly » Mon 20 Aug, 2018 11:27 am

Thanks for your post Leodian.
No matter were i end my days im an Hunslet lad with Hunslet ways.

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