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97118 |
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Date: June 15, 2023 at 14:05:04
From: pamela, [DNS_Address]
Subject: 7.2 S of Fiji |
URL: https://earthquake.usgs.gov/earthquakes/eventpage/us7000k8qh/executive |
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https://earthquake.usgs.gov/earthquakes/eventpage/us7000
k8qh/executive
M 7.2 - 280 km SW of Houma, Tonga
2023-06-15 18:06:27 (UTC)22.982°S 177.208°W167.4 km
depth
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Responses:
[97129] [97120] [97121] [97119] [97122] [97123] |
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97129 |
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Date: June 16, 2023 at 15:23:31
From: shatterbrain, [DNS_Address]
Subject: Re: 7.2 S of Fiji |
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That's one hell of a remote trigger signal.
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Responses:
None |
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97120 |
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Date: June 15, 2023 at 17:01:03
From: pamela, [DNS_Address]
Subject: Re: 7.2 S of Fiji |
URL: https://earthquake.usgs.gov/earthquakes/eventpage/us7000k8qh/executive |
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usgs says its south of Fiji,
M 7.2 - south of the Fiji Islands
IV
DYFI
VI
ShakeMap
GREEN
PAGER
Time
2023-06-15 12:06:27 (UTC-06:00)
Location
22.982˘XS 177.208˘XW
Depth
167.4 km
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Responses:
[97121] |
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97121 |
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Date: June 15, 2023 at 17:09:12
From: pamela, [DNS_Address]
Subject: Re: 7.2 S of Fiji -USGS just updated, said its sw of Tonga |
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I'll wait til they get it sorted out.. one says south of
Tonga, other says south of Fiji
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Responses:
None |
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97119 |
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Date: June 15, 2023 at 16:00:06
From: Eve, [DNS_Address]
Subject: Re: 7.2 S of Fiji |
URL: http://earthboppin.net/talkshop/space/messages/47495.html |
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fwiw:
http://earthboppin.net/talkshop/space/messages/47495.html
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Responses:
[97122] [97123] |
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97122 |
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Date: June 15, 2023 at 17:21:53
From: Eve, [DNS_Address]
Subject: Re: 7.2 S of Fiji (Tonga to Fiji distance) |
URL: https://distancecalculator.globefeed.com/Distance_Between_Countries_Result.asp?fromplace=Fiji&toplace=Tonga |
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It's closer to Tonga per emsc...either way Tong and FiJi are in the same general area.
Currently location is closer to Tonga than Fiji:
Magnitude Mw 7.2
Region SOUTH OF FIJI ISLANDS
Date time 2023-06-15 18:06:27.8 UTC
Location 23.02 S ; 177.16 W
Depth 160 km
Distances 710 km SE of Suva, Fiji / pop: 77,300 / local time: 06:06:27.8 2023-06-16
291 km SSW of Nuku‘alofa, Tonga / pop: 22,400 / local time: 07:06:27.8 2023-06-16
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Responses:
[97123] |
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97123 |
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Date: June 15, 2023 at 17:57:39
From: Eve, [DNS_Address]
Subject: Re: 7.2 S of Fiji (Tonga to Fiji distance) |
URL: https://earthquake.usgs.gov/earthquakes/eventpage/us7000k8qh/executive |
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USGS at time of this post has changed back to Tonga fwiw...there is more text concerning this earthquake:
M 7.2 - 280 km SW of Houma, Tonga
2023-06-15 18:06:27 (UTC)22.982°S 177.208°W167.4 km depth
Tectonic Summary
The June 15, 2023, M 7.2 earthquake southwest of Houma, Tonga, occurred as a result of normal faulting at an intermediate depth within subducted Pacific lithosphere, approximately 170 km
beneath the Pacific Ocean. Focal mechanism solutions indicate that rupture occurred on either a near-vertical, north-northeast striking normal fault, or on a shallow dipping, southeast
striking normal fault. At the location of this earthquake, the Pacific and Australia plates are converging at a velocity of about 73 mm/yr in an east-west direction, resulting in the
westward subduction of the Pacific plate beneath Tonga at the Tonga-Kermadec Trench, ~200 km west of the earthquake. The depth and faulting mechanism of the June 15 earthquake indicate
that it ruptured a fault within the subducting Pacific lithosphere rather than on the shallower thrust interface between the two plates. Slip on a fault aligned with either nodal plane
of the focal mechanism solution is consistent with this intraplate setting.
The Tonga-Kermadec Arc has frequent moderate to large earthquakes and has hosted 94 other M 6.0+ earthquakes within 250 km of the June 15 earthquake over the past century. Most of these
also occurred at intermediate depths. This June 15 event is in a similar location and has a similar mechanism to a M7.4 earthquake that occurred roughly a decade prior.
Earthquakes like this event, with focal depths between 70 and 300 km, are commonly termed “intermediate-depth” earthquakes. Intermediate-depth earthquakes represent deformation within
subducted slabs rather than at the shallow plate interface between subducting and overriding tectonic plates. They typically cause less damage on the ground surface above their foci than
is the case with similar-magnitude shallow-focus earthquakes, but large intermediate-depth earthquakes may be felt at great distance from their epicenters. “Deep-focus” earthquakes,
those with focal depths greater than 300 km, also occur in the subducted Pacific plate beneath the Lau Ridge and South Fiji Basin to the west. Earthquakes have been reliably located to
depths of about 650 km in this region.
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Responses:
None |
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