M7.1 Quake Headed for Guam - Seismograms

  • Thread starter Thread starter davenn
  • Start date Start date
Click For Summary

Discussion Overview

The discussion revolves around a significant earthquake reported in the Guam area, initially measured at magnitude 7.1, and later downgraded to 6.7. Participants share observations from seismographs, discuss the implications of the quake's depth, and reference related geological events, including a volcanic eruption in the Philippines.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant reports a significant quake detected on their seismograph, initially indicating M 7.1 in the Guam area.
  • Another participant questions the location, suggesting a different region based on available information.
  • A participant confirms the quake's downgrade to M 6.7 and discusses its depth of 137 km, attributing the lack of extended surface waves to this depth.
  • There is mention of minimal damage reported from the downgraded quake, with a note that it occurred offshore.
  • Participants discuss a concurrent volcanic eruption at Mount Mayon in the Philippines, highlighting evacuations and personal travel experiences related to volcanoes in the region.
  • One participant shares a seismogram image, noting its temporary nature as the quake will soon scroll off the display.

Areas of Agreement / Disagreement

Participants generally agree on the downgrade of the earthquake's magnitude and its offshore location, but there is uncertainty regarding the initial reports and the implications of the quake's depth. The discussion about the volcanic activity introduces additional topics without a clear consensus on their relation to the earthquake.

Contextual Notes

Participants reference various sources for earthquake data and volcanic activity, indicating a reliance on external reports. The discussion includes personal observations and experiences, which may not fully align with the scientific data presented.

Who May Find This Useful

Individuals interested in seismology, geological events, and the impact of earthquakes and volcanic activity in the Pacific region may find this discussion relevant.

davenn
Science Advisor
Gold Member
Messages
9,725
Reaction score
11,821
Earth sciences news on Phys.org
This is as close as I could find. Still think Guam?
http://latino.foxnews.com/latino/news/2014/09/15/mexico-baja-california-peninsula-rocked-by-2-earthquakes/
 
Last edited:
http://earthquake.usgs.gov/earthquakes/eventpage/usb000sdcr#summary

yup still think its Guam :wink:

after about an hour or so it was downgraded to a M 6.7
Its just on 137 km deep so that explains its lack of an extended period of surface waves.

For me here in Sydney, Australia, for quakes down the western side of the Americas ( nth, cntrl, sth) I start seeing them at ~ M 5.8. I can determine (clearly recognise) P and S arrivals at ~ M 6.5

cheers
Dave
 
Last edited:
Mount Mayon, on the SE tip of Luzon in the Philippines, is currently erupting. Evacuations are underway should a more catastrophic eruption occur:

http://www.weather.com/news/mayon-volcano-eruption-philippines-evacuations-20140916
 
The http://www.guampdn.com/article/20140918/NEWS01/309180003/6-7-quake-rattles-Guam says it was downgraded to 6.7 and there was minimal damage.
 
Vanadium 50 said:
The http://www.guampdn.com/article/20140918/NEWS01/309180003/6-7-quake-rattles-Guam says it was downgraded to 6.7 and there was minimal damage.

yes that's correct, fortunately it was offshore rather than right underneath Guam

Dave
 
SteamKing said:
Mount Mayon, on the SE tip of Luzon in the Philippines, is currently erupting. Evacuations are underway should a more catastrophic eruption occur:

http://www.weather.com/news/mayon-volcano-eruption-philippines-evacuations-20140916

My Wife if from the Philippines. We haven't been to Mt Mayon yet ... its on that "to do" list
Travelling in the Philippines isn't much fun. The transport system is diabolical and the roads are even worse and the SE end of Luzon is a long way off our usual beaten path :wink:

Have visited the Ta'al volcano (sthrn Luzon) a couple of times and taken a boat out across the crater lake to the central island cone that quietly smokes away

Actually there's a bunch of volcanoes in the western/SW Pacific that are on the to do list to visit
Time and money both lacking


Dave
 
just a post of the seismogram, as the quake will scroll off the display by the end of today

attachment.php?attachmentid=73254&stc=1&d=1411001396.gif


cheers
Dave
 

Attachments

  • 140917 UT M 6.7 Guam reg zhi.gif
    140917 UT M 6.7 Guam reg zhi.gif
    130.4 KB · Views: 781
  • #10
Wow, awesome seismograph :approve:.
 
  • #11
Thanks Lisa :)D
 

Similar threads

Is a Mw 6.8 Earthquake from Chile Headed for My Seismograph?
  • · Replies 2 ·
Replies
2
Views
2K
M7.1 Molucca Sea, Northern Indonesia
  • · Replies 9 ·
Replies
9
Views
3K
M7.7 Jamaica Quake: Surface Waves Coming Soon
  • · Replies 10 ·
Replies
10
Views
3K
What caused the M6.3 earthquake west of Macquarie Island?
  • · Replies 8 ·
Replies
8
Views
3K
A Mw6.7 coming in from Turkey now
  • · Replies 12 ·
Replies
12
Views
3K
Mw6.6 Quake offshore of NW Western Australia, Australia .... NOW
  • · Replies 4 ·
Replies
4
Views
3K
M7.6 Earthquake Off Tonga - 2023-05-10
  • · Replies 5 ·
Replies
5
Views
3K
What Caused the Recent Earthquakes in the SW Pacific Region?
  • · Replies 3 ·
Replies
3
Views
4K
M6.2 quake SW of NZ
  • · Replies 1 ·
Replies
1
Views
3K
Seismogram: M 6.8 & 7.1 Earthquakes in Eastern New Britain, PNG
  • · Replies 7 ·
Replies
7
Views
3K