David K
Honored Nomad
Posts: 64848
Registered: 8-30-2002
Location: San Diego County
Member Is Offline
Mood: Have Baja Fever
|
|
Three moderate quakes this morning felt in San Felipe. Three more shakers added.
The epicenters are near Valle de Trinidad...
4.4 at 8:09 am
5.2 at 8:30 am
5.1 at 8:31
https://earthquake.usgs.gov/earthquakes/map/?currentFeatureI...
[Edited on 8-17-2020 by David K]
[Edited on 8-17-2020 by David K]
|
|
|
bajatrailrider
Super Nomad
Posts: 2432
Registered: 1-24-2015
Location: Mexico
Member Is Offline
Mood: Happy
|
|
I felt it in San Vicente nothing just two small bumps
|
|
|
David K
Honored Nomad
Posts: 64848
Registered: 8-30-2002
Location: San Diego County
Member Is Offline
Mood: Have Baja Fever
|
|
More quakes in the same Valle de Trinidad area... six so far:
about 2 hours ago 3.8 magnitude, 8 km depth
Fraccionamiento del Valle, Baja California, Mexico
about 4 hours ago 3.7 magnitude, 10 km depth
La Providencia, Baja California, Mexico
about 5 hours ago 4.3 magnitude, 10 km depth
La Providencia, Baja California, Mexico
about 5 hours ago 4.5 magnitude, 10 km depth
La Providencia, Baja California, Mexico
about 5 hours ago 5.1 magnitude, 16 km depth
Fraccionamiento del Valle, Baja California, Mexico
about 5 hours ago 4.4 magnitude, 10 km depth
La Providencia, Baja California, Mexico
Map and more: https://earthquaketrack.com/mx-02-san-felipe/recent?fbclid=I...
[Edited on 8-17-2020 by David K]
|
|
|
BajaNomad
Super Administrator
Posts: 4999
Registered: 8-1-2002
Location: San Diego, CA
Member Is Offline
Mood: INTP-A
|
|
https://earthquake.usgs.gov/earthquakes/eventpage/ci39347679...
https://earthquake.usgs.gov/earthquakes/map/?extent=30.34681...
[Edited on 8-18-2020 by BajaNomad]
When I was young, I admired clever people. Now that I am old, I admire kind people.
– Rabbi Abraham Joshua Heschel
We know we must go back if we live, and we don`t know why.
– John Steinbeck, Log from the Sea of Cortez
https://www.regionalinternet.com
Affordable Domain Name Registration/Management & cPanel Web Hosting - since 1999 |
|
|
David K
Honored Nomad
Posts: 64848
Registered: 8-30-2002
Location: San Diego County
Member Is Offline
Mood: Have Baja Fever
|
|
Poor Valle de Trinidad!
|
|
|
elgatoloco
Ultra Nomad
Posts: 4332
Registered: 11-19-2002
Location: Yes
Member Is Offline
|
|
https://www.usgs.gov/natural-hazards/earthquake-hazards/scie...
MAGA
Making Attorneys Get Attorneys
|
|
|
BajaNaranja
Nomad
Posts: 156
Registered: 9-10-2006
Member Is Offline
|
|
Quote: Originally posted by lencho  |
Something I don't understand about magnitude:
When they say something like
4.5 magnitude, 5 km depth
is that going to have worse surface impact than the same magnitude at 10 km depth?
I.e. is the magnitude number at the point of origin? |
My understanding is that absolutely, yes.
"The strength of shaking from an earthquake diminishes with increasing distance from the earthquake's source, so the strength of shaking at the
surface from an earthquake that occurs at 500km deep is considerably less than if the same earthquake had occurred at 20 km depth."
https://www.usgs.gov/faqs/what-depth-do-earthquakes-occur-wh...
|
|
|
BajaNaranja
Nomad
Posts: 156
Registered: 9-10-2006
Member Is Offline
|
|
You bet - my interest in earthquake depth comes from a fascination with tsunamis - since shallow earthquakes are those that generally create tsunamis.
Tsunami-generating quakes will rupture the seafloor, or are close enough to physically disrupt the seafloor.
So when there's news about a quake somewhere underwater, my first thought is "how deep was it?" - although depth alone doesn't necessarily forebode a
tsunami.
The huge Japan tsunami was from a quake about 30km deep, which caused a massive rupture and displacement at the seafloor where it jumped up as much as
20-26 feet along a 110 mile long section... !!! Boggles the mind!
|
|
|
mtgoat666
Select Nomad
Posts: 18377
Registered: 9-16-2006
Location: San Diego
Member Is Offline
Mood: Hot n spicy
|
|
Here is a good summary of how EQ magnitudes are calculated, for people who understand basic math and physics:
https://www.bgs.ac.uk/discoveringGeology/hazards/earthquakes...
Woke!
“...ask not what your country can do for you – ask what you can do for your country.” “My fellow citizens of the world: ask not what America
will do for you, but what together we can do for the freedom of man.”
Prefered gender pronoun: the royal we
|
|
|
AKgringo
Elite Nomad
Posts: 6027
Registered: 9-20-2014
Location: Anchorage, AK (no mas!)
Member Is Offline
Mood: Retireded
|
|
It's not just the sea floor you have to worry about!
Earthquake plus rock slide tsunami; https://en.wikipedia.org/wiki/1958_Lituya_Bay,_Alaska_earthq...
If you are not living on the edge, you are taking up too much space!
"Could do better if he tried!" Report card comments from most of my grade school teachers. Sadly, still true!
|
|
|
![[*]](images/xmbforum/default_icon.gif){kind=icon}
