Mw 7.4 quake north of New Zealand

[davenn]

One of the largest quakes for 2020 occurred late last nite in the Kermadec Islands region ~ 700km north of the North Island of New Zealand.
The Mw 7.4 maxed out my seismograph for some time

From the GNS in New Zealand
https://www.geonet.org.nz/earthquake/technical/2020p458203

from the USGS
https://earthquake.usgs.gov/earthquakes/eventpage/us6000ae4n/executivecheers
Dave

 

[berkeman]

Wow, that's strong. Luckily it was deep at 44km and no tsunami warnings, right?

 

[Astronuc]

Wow, that's strong. Luckily it was deep at 44km and no tsunami warnings, right?

Geonet.nz is putting depth at 33 km (± 0 km), and USGS has it at 10 km depth.
The US Tsunami Warning System puts the depth at 21 miles (~33 km)
https://www.tsunami.gov/?p=PHEB/2020/06/18/20170001/1/WEPA40
They did not issue a tsunami warning.

From the USGS summary, it states "The June 18, 2020, M 7.4 Kermadec Islands region earthquake occurred as the result of shallow strike slip faulting near the Kermadec Trench where the Pacific plate begins its descent into the mantle beneath the eastern edge of the Australia plate." I presume there was no heaving or subduction (large displacement) that would induce a tsunami, therefore there was no tsunami warning.

 

[berkeman]

Geonet.nz is putting depth at 33 km (± 0 km), and USGS has it at 10 km depth.
The US Tsunami Warning System puts the depth at 21 miles (~33 km)
https://www.tsunami.gov/?p=PHEB/2020/06/18/20170001/1/WEPA40

Yikes, those error bars don't overlap, do they?