[url]https://earthquake.usgs.gov/earthquakes/map/?currentFeatureId=us7000ingi&extent=-35.88905,-235.54688&extent=76.3519,45.70313[/url] or https://earthquake.usgs.gov/earthquakes/map/?currentFeatureId=us7000ingi&extent=-35.88905,-235.54688&extent=76.3519,45.70313 - https://earthquake.usgs.gov/earthquakes/map/?currentFeatureId=us7000ingi&extent=-35.88905,-235.54688&extent=76.3519,45.70313 has a M(agnitude) 7.0 south of the Fiji Islands at a depth of 665,3 kilometers....

[url]https://7news.com.au/news/world/string-of-powerful-earthquakes-hit-fiji-c-8812506[/url] or https://7news.com.au/news/world/string-of-powerful-earthquakes-hit-fiji-c-8812506 - https://7news.com.au/news/world/string-of-powerful-earthquakes-hit-fiji-c-8812506 ;

A string of powerful earthquakes have struck Fiji on Thursday morning (AEST).

According to government agency Geoscience Australia, the quakes were recorded south of the Fiji Islands in the Pacific.

The first earthquake had a magnitude of 6.8 and struck around 8.38am (AEST).

The second with a huge magnitude of 7 struck around 15 minutes later, and the third with a magnitude of 6.6 at 9.14am (AEST).

All three quakes had a depth of around 600km.

There was no tsunami threat, Seismology Fiji said in a statement on social media.

DJ...much to deep to result in a tsunami...however it may increase seismic activity around the Pacific...

[url]https://www.reuters.com/world/asia-pacific/three-quakes-hit-fiji-islands-region-no-tsunami-warnings-2022-11-09/[/url] or https://www.reuters.com/world/asia-pacific/three-quakes-hit-fiji-islands-region-no-tsunami-warnings-2022-11-09/ - https://www.reuters.com/world/asia-pacific/three-quakes-hit-fiji-islands-region-no-tsunami-warnings-2022-11-09/ ;

DJ...so far no major further quakes...M9+ quakes [url]https://en.wikipedia.org/wiki/Earthquake#Major_earthquakes[/url] or  https://en.wikipedia.org/wiki/Earthquake#Major_earthquakes - https://en.wikipedia.org/wiki/Earthquake#Major_earthquakes  may not kill many people if they show up in hardly populated area's...however tsunami's may be massive killers...

Another -close to the surface-FiJi quake [url]https://www.swissinfo.ch/eng/tsunami-warning-lifted-after-7.3-magnitude-earthquake-strikes-tonga-region/48049808[/url] or https://www.swissinfo.ch/eng/tsunami-warning-lifted-after-7.3-magnitude-earthquake-strikes-tonga-region/48049808 - https://www.swissinfo.ch/eng/tsunami-warning-lifted-after-7.3-magnitude-earthquake-strikes-tonga-region/48049808  

November 11, 2022 - 14:11

(Reuters) -The government of Tonga asked citizens to move inland early on Saturday after an earthquake of magnitude 7.3 struck the sea around 211 km (131 miles) from the capital, though a tsunami warning issued for Tonga and American Samoa was lifted.

The earthquake was at a depth of 24.8 km (15.4 miles) that struck the sea at about 211 km (131 miles) east of south-east of Neiafu, according to the United States Geological Survey (USGS).

"Based on all available data the tsunami threat from this Earthquake has now passed," said the U.S. Pacific Tsunami Warning Center.

There is no tsunami threat to New Zealand, the country's National Emergency Management Agency said on Twitter.

Tonga's meteorological service continued to warn residents to remain inland and on high ground.

"Please remain inland and on high ground and please listen to radio until further advised. For mariners, move away from the reefs to deep ocean," it said on its Facebook page.

In January, the Hunga Tonga-Hunga Ha'apai volcano eruption triggered a tsunami that destroyed villages and resorts and knocked out communications for the South Pacific nation of about 105,000 people. At least three people were killed.

(Reporting by Maria Ponnezhath and Abinaya Vijayaraghavan in BengaluruEditing by Raissa Kasolowsky and Chizu Nomiyama)

DJ...maybe this will have released enough pressure ?

A bit more background on Fiji-quakes [url]https://quantectum.com/blog/seismic-activity-in-fiji/[/url] or https://quantectum.com/blog/seismic-activity-in-fiji/ - https://quantectum.com/blog/seismic-activity-in-fiji/ ;

Although Fiji is situated within a relatively quiet seismic area, the Pacific Ring of Fire that surrounds it coincides with tectonic plate boundaries, which are extremely active seismic zones capable of generating large earthquakes.

According to the United States Geological Survey (USGS), in 2020, 19 earthquakes with a magnitude of more than 4.0 occurred within 200 km of Fiji (among the strongest were four between 5.0 to 6.0). The following year, in 2021, again 19 earthquakes of 4.0 or more occurred (among them were three with a magnitude above 5.0, with two of those above 6.0). This year, the USGS has reported 12 earthquakes above magnitude 4.0, with none of them reaching a magnitude of 5.0.

Earthquakes in this region are caused when the boundaries of tectonic plates subduct or slip beneath each other. The two largest instrumentally recorded earthquakes along the Circum-Pacific belt were a magnitude 9.5 in Chile in 1960 and a magnitude 9.2 in Alaska in 1962¹.

DJ...it is still very hard to predict earthquakes...There may be some indications deeper quakes can spread to less deeper-stronger-quakes via plate bounderies...but if an increase of pressure does bring a quake-and when-is not clear/complex...

Loss of land-ice in Greenland, Antarctica, higher mountains means less pressure-also may increase seismic activity worldwide...(The 3 kilometer thick ice on Greenland is pushing Greenland up to 1 kilometer down-in some calculations...so less ice means the land mass will rise-resulting in seismic activity...Also land-ice in larger volume, hurricanes, may push very large waves of water/pressure over the ocean..also seems to have links with seismic activity...). 

DJ, 

Lots of "seismic unrest" [url]https://earthquake.usgs.gov/earthquakes/map/?extent=-80.2385,-376.17188&extent=84.9901,186.32813[/url] or https://earthquake.usgs.gov/earthquakes/map/?extent=-80.2385,-376.17188&extent=84.9901,186.32813 - https://earthquake.usgs.gov/earthquakes/map/?extent=-80.2385,-376.17188&extent=84.9901,186.32813 a.o. a M6.1 Toba-Japan quake-dept 357,4 km...M6,1 Fiji quake (#?) dept 627,4 km...unusual...

[url]https://www.youtube.com/watch?v=IYdFPUTIEWs[/url] or  https://www.youtube.com/watch?v=IYdFPUTIEWs - https://www.youtube.com/watch?v=IYdFPUTIEWs Dutchsinse...see what he has to say...(still on my video-waitinglist..geo-metric shapes...but not very helpfull....).

DJ, 

What makes deep earthquakes apart, interesting is those quakes are UNDER the continental plates. [url]https://en.wikipedia.org/wiki/Plate_tectonics[/url] or https://en.wikipedia.org/wiki/Plate_tectonics - https://en.wikipedia.org/wiki/Plate_tectonics ; 

The key principle of plate tectonics is that the lithosphere exists as separate and distinct https://en.wikipedia.org/wiki/List_of_tectonic_plates" style="text-decoration: none; color: rgb(6, 69, 173); background: none;" title="List of tectonic plates - tectonic plates , which ride on the fluid-like ( https://en.wikipedia.org/wiki/Visco-elastic" style="text-decoration: none; color: rgb(6, 69, 173); background: none;" title="Visco-elastic - visco-elastic solid) asthenosphere. Plate motions range up to a typical 10–40 mm/year ( https://en.wikipedia.org/wiki/Mid-Atlantic_Ridge" style="text-decoration: none; color: rgb(6, 69, 173); background: none;" title="Mid-Atlantic Ridge - Mid-Atlantic Ridge ; about as fast as https://en.wikipedia.org/wiki/Fingernail" style="text-decoration: none; color: rgb(6, 69, 173); background: none;" title="Fingernail - fingernails grow), to about 160 mm/year ( https://en.wikipedia.org/wiki/Nazca_Plate" style="text-decoration: none; color: rgb(6, 69, 173); background: none;" title="Nazca Plate - Nazca Plate ; about as fast as https://en.wikipedia.org/wiki/Hair" style="text-decoration: none; color: rgb(6, 69, 173); background: none;" title="Hair - hair grows). ^{https://en.wikipedia.org/wiki/Plate_tectonics#cite_note-6" style="text-decoration: none; color: rgb(6, 69, 173); background: none; - [6]} The driving mechanism behind this movement is described below.

Tectonic lithosphere plates consist of lithospheric mantle overlain by one or two types of crustal material: https://en.wikipedia.org/wiki/Oceanic_crust" style="text-decoration: none; color: rgb(6, 69, 173); background: none;" title="Oceanic crust - oceanic crust (in older texts called https://en.wikipedia.org/wiki/Sima_(geology)" style="text-decoration: none; color: rgb(6, 69, 173); background: none;" title="Sima (geology) - sima from https://en.wikipedia.org/wiki/Silicon" style="text-decoration: none; color: rgb(6, 69, 173); background: none;" title="Silicon - silicon and https://en.wikipedia.org/wiki/Magnesium" style="text-decoration: none; color: rgb(6, 69, 173); background: none;" title="Magnesium - magnesium ) and https://en.wikipedia.org/wiki/Continental_crust" style="text-decoration: none; color: rgb(6, 69, 173); background: none;" title="Continental crust - continental crust ( https://en.wikipedia.org/wiki/Sial" style="text-decoration: none; color: rgb(6, 69, 173); background: none;" title="Sial - sial from silicon and https://en.wikipedia.org/wiki/Aluminium" style="text-decoration: none; color: rgb(6, 69, 173); background: none;" title="Aluminium - aluminium ). Average oceanic lithosphere is typically 100 km (62 mi) thick; ^{https://en.wikipedia.org/wiki/Plate_tectonics#cite_note-FOOTNOTETurcotteSchubert20025-7" style="text-decoration: none; color: rgb(6, 69, 173); background: none; - [7]} its thickness is a function of its age: as time passes, it conductively cools and subjacent cooling mantle is added to its base. Because it is formed at mid-ocean ridges and spreads outwards, its thickness is therefore a function of its distance from the mid-ocean ridge where it was formed. For a typical distance that oceanic lithosphere must travel before being subducted, the thickness varies from about 6 km (4 mi) thick at mid-ocean ridges to greater than 100 km (62 mi) at https://en.wikipedia.org/wiki/Subduction" style="text-decoration: none; color: rgb(6, 69, 173); background: none;" title="Subduction - subduction zones; for shorter or longer distances, the subduction zone (and therefore also the mean) thickness becomes smaller or larger, respectively. ^{https://en.wikipedia.org/wiki/Plate_tectonics#cite_note-FOOTNOTETurcotteSchubert2002-8" style="text-decoration: none; color: rgb(6, 69, 173); background: none; - [8]} Continental lithosphere is typically about 200 km thick, though this varies considerably between basins, mountain ranges, and stable https://en.wikipedia.org/wiki/Craton" style="text-decoration: none; color: rgb(6, 69, 173); background: none;" title="Craton - cratonic interiors of continents.

What can explain those deep quakes ? I think horizontal movement-one part of the plate moving up-the opposite side moving down...Climate change will be a factor. Less ice and snow on Greenland, Antarctica, Himalaya's is pushing that landmass up-so there the "plate" can go up...the opposite side could be in a location with deep earthquakes...but-again-linking climate change to deep earthquakes is still in study...[url]https://www.air-worldwide.com/blog/posts/2021/11/climate-change-may-influence-earthquakes/[/url] or https://www.air-worldwide.com/blog/posts/2021/11/climate-change-may-influence-earthquakes/ - https://www.air-worldwide.com/blog/posts/2021/11/climate-change-may-influence-earthquakes/ ;

Glacial rebounding is a phenomenon where the crust rises due to melting of ice (unloading). The Canadian shield has been experiencing glacial rebounding since the last glacial retreat in the North America continent. As the climate continues to warm and reduce the amount of ice in some places and increase the mass of water (e.g., from oceans, precipitation), the stress on tectonic plates can change—sometimes abruptly. The topic of climate’s contribution to earthquakes, tsunamis, and even volcanic eruptions is not new and has been studied for the last few decades, with continued research interest.

A  https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2020JB020411" rel="noopener" style="margin: 0px; padding: 0px; box-sizing: border-box; text-decoration: none; cursor: pointer; background-color: transparent; color: rgb(0, 78, 234); font-weight: bold; transition: all 0.25s ease 0s; word-break: break-word; - recent article , for example, discussed the contribution of glacial melt to a 1958 M7.8 earthquake in Alaska. That earthquake unleashed 30 million cubic meters of rock, causing a massive rockslide that slammed into the waters of the Gilbert Inlet and caused the  https://geology.com/records/biggest-tsunami.shtml" rel="noopener" style="margin: 0px; padding: 0px; box-sizing: border-box; text-decoration: none; cursor: pointer; background-color: transparent; color: rgb(0, 78, 234); font-weight: bold; transition: all 0.25s ease 0s; word-break: break-word; - world’s largest tsunami runup ever recorded—1720 meters.

The study noted that the event occurred in July, which is the warmest month of the year in Alaska, and that 1958 was the warmest year since 1944. The authors estimated that glacial melt increased the probability of the event occurring by 2%. While this may not be a big impact for that event,  https://www.air-worldwide.com/blog/posts/2019/4/arctic-amplification-a-very-bad-positive-feedback-loop/" rel="noopener" style="margin: 0px; padding: 0px; box-sizing: border-box; text-decoration: none; cursor: pointer; background-color: transparent; color: rgb(0, 78, 234); font-weight: bold; transition: all 0.25s ease 0s; word-break: break-word; - Arctic amplification is causing rapid glacial melt in high latitudes, so the possibility exists for more activity like this to occur in the future.

The reduction of glacial ice on and around volcanoes has also been  https://pubs.geoscienceworld.org/gsa/geology/article/46/1/47/521232/Climatic-control-on-Icelandic-volcanic-activity" rel="noopener" style="margin: 0px; padding: 0px; box-sizing: border-box; text-decoration: none; cursor: pointer; background-color: transparent; color: rgb(0, 78, 234); font-weight: bold; transition: all 0.25s ease 0s; word-break: break-word; - shown to correlate with increased volcanic activity . This makes for a potentially interesting negative feedback mechanism between climate change and increased sulfate aerosols that would form from the activity and slightly reduce incoming solar radiation.

[url]https://en.wikipedia.org/wiki/Deep-focus_earthquake[/url] or https://en.wikipedia.org/wiki/Deep-focus_earthquake - https://en.wikipedia.org/wiki/Deep-focus_earthquake other explanation...