M 7.3 - 2025 Sand Point, Alaska Earthquake, 16 July, 2025

  • Thread starter Thread starter Astronuc
  • Start date Start date
Click For Summary
SUMMARY

The M 7.3 earthquake that struck Sand Point, Alaska on July 16, 2025, at 20:37:39 UTC, was a significant seismic event located at a depth of 20.1 km with coordinates 54.549°N 160.472°W. Notably, seismic waves from this earthquake were detected traveling through the continental United States, particularly passing through Southern Ontario around 4:37 PM local time. Despite these measurements, the earthquake's effects were completely unnoticeable to individuals in the lower 48 states, only detectable by sensitive seismic recorders.

PREREQUISITES
  • Understanding of seismic wave propagation
  • Familiarity with earthquake measurement tools like seismometers
  • Knowledge of the geographical impact of earthquakes
  • Awareness of the USGS earthquake reporting system
NEXT STEPS
  • Research seismic wave analysis techniques
  • Explore the functionality of seismometers and their applications
  • Study the geographical distribution of seismic events in the Aleutian Islands
  • Learn about the USGS Earthquake Hazards Program and its data resources
USEFUL FOR

Seismologists, geophysicists, earthquake researchers, and anyone interested in understanding seismic events and their effects on distant regions.

Astronuc
Staff Emeritus
Science Advisor
Gold Member
2025 Award
Messages
22,504
Reaction score
7,435
Very strong earthquake in the Aleutian Island chain
https://earthquake.usgs.gov/earthquakes/eventpage/us7000qd1y/executive

M 7.3 - 2025 Sand Point, Alaska Earthquake​

  • 2025-07-16 20:37:39 (UTC)
  • 54.549°N 160.472°W
  • 20.1 km depth

What's interesting about this particular earthquake is the measurements of seismic waves traveling through the continental US.
https://ds.iris.edu/spud/gmv/23319759

I've not seen that before, but presumably similar measurements are made for other earthquakes.

https://www.earthscope.org/geophysical-event/m-7-3-sand-point-alaska-us7000qd1y/
 
Earth sciences news on Phys.org
It looks like it passed through S. Ontario around 4:37PM local time Monday.

Am I able to deduce what effects, if any, we ought to have experienced here?
 
DaveC426913 said:
Am I able to deduce what effects, if any, we ought to have experienced here?
It would probably be unnoticeable among all the other 'noise' from normal, everyday activities, e.g., transportation.
 
DaveC426913 said:
Am I able to deduce what effects, if any, we ought to have experienced here?

completely unnoticeable by a person, regardless of background noise levels, only recordable on sensitive seismic recorders.
It was just too far from the "lower48" to be felt by a person

Dave
 
this was my recording of it, on my seismo, here in Sydney, Australia.

1753321651804.gif
 
Reply
  • Like
Likes   Reactions: DOGE3500

Similar threads

Mag 7.0 Earthquake, Hubbard Glacier, Alaska - British Columbia
  • · Replies 1 ·
Replies
1
Views
788
M7.6 Drake Passage; M7.4, M6.7 Philippines, M6.3 Papua New Guinea Earthquakes
  • · Replies 1 ·
Replies
1
Views
819
Mount Rainier - earthquake swarm July 2025
  • · Replies 2 ·
Replies
2
Views
743
M 7.4 - 2025 Drake Passage Earthquake - unusual
  • · Replies 3 ·
Replies
3
Views
3K
Earthquakes in Queensland, Mag 4.9, 5.6 - August 15
  • · Replies 5 ·
Replies
5
Views
618
M 7.2 - 98 km S of Sand Point, Alaska; Shishaldin Volcano erupting
  • · Replies 2 ·
Replies
2
Views
3K
Mag 8.2 Earthquake and aftershocks ~ 104 km SE of Perryville, Alaska
  • · Replies 5 ·
Replies
5
Views
2K
M6.8 Earthquake, 40 km SSW of Bartolomé Masó, Cuba
  • · Replies 2 ·
Replies
2
Views
2K
M 7.3 - 174 km NE of Gisborne, New Zealand
  • · Replies 28 ·
Replies
28
Views
3K
M 2.9 Earthquake, Lake Michigan, 39 km ESE of Sturgeon Bay, Wisconsin
  • · Replies 2 ·
Replies
2
Views
3K