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Questions tagged [earthquakes]

Questions regarding a sudden release of seismic waves into the Earth's crust. As well as the causes of earthquakes, their consequences and physics.

31 questions with no upvoted or accepted answers
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15 votes
0 answers
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What are the ground motion prediction equations for 3-D ruptures?

Ground motion prediction equations (GMPEs) estimate ground motion at any given site due to an earthquake at a distance. There are many such equations, each with different parameters. Can somebody ...
user590's user avatar
  • 361
8 votes
0 answers
332 views

What geological structure(s) is responsible for the recent Queensland earthquakes?

Recently, south-east Queensland has been rattled by 2 moderate earthquakes - a 5.3 a couple of days ago (News report) and a 5.7 tremor just a few hours ago as of writing this post (News Report). These ...
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8 votes
0 answers
107 views

Question about earthquake data attribute codes

I have some earthquake data with an attribute field call M and has values c, h , l , m or w. There is another one called Magnitude so I assume its not that. Any ideas what M represents and what the ...
Gern Blanston's user avatar
5 votes
0 answers
156 views

Farallon plate subducting under North American plate: is it a factor in "the next big one"?

I am a writer, not a scientist of any kind. I live in the SW AZ desert (USA), so we get earthquakes from time to time. I grew up in southern CA, right next to the San Andreas fault, so I have a ...
EdNerd's user avatar
  • 151
5 votes
0 answers
69 views

Locating an seismic epicenter

I understand how to find an epicenter using three sensor locations and why three locations are needed. Is it possible, though very improbable, to find an epicenter if you only have two seismic ...
jake's user avatar
  • 51
5 votes
0 answers
58 views

How do I generate a Moho depth model from seismic refraction data?

There are several permanent seismograph stations in Eastern Canada that have been recording arrival times for over 25 years. Using refracted Pn arrival times from natural earthquakes I would like to ...
Alex Koldewey's user avatar
5 votes
0 answers
109 views

Conversion of body wave magnitude to moment magnitude

I have been tasked with homogenizing a catalog of events obtained from the USGS website, however, the data is a mix of different type of magnitude measures. How do I convert the different type of ...
Stephen Jacob's user avatar
4 votes
0 answers
103 views

How much would the ground be displaced in a magnitude 11 earthquake?

In a magnitude 5 earthquake, the ground shakes violently and it's often impossible to stay upright. This is caused by about 50-120 cm of displacement of the ground. But how much would the ground move ...
Wesley Adams's user avatar
4 votes
0 answers
179 views

Is the probability distribution of earthquakes memoryless?

What I want to know is more specific than the title: If a city sits on major fault lines (let's say Tehran), and has a history of severe earthquakes (greater than 7 magnitude) once every 150 years in ...
asmani's user avatar
  • 141
4 votes
0 answers
108 views

What is the plausability/legitimacy of the San Andreas Fault 'Big One' Megaquake mechanism?

In the ScienceAlert article "New estimates suggest the 'big one' in San Andreas could be much worse than we thought" they make the claim that: Researchers have forecast a mega-quake running the ...
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3 votes
0 answers
66 views

Is it possible for Mexico to have a magnitude 9 earthquake?

Everyone has heard of the Cascadia Subduction Zone and the potential threat it poses. However, I have heard nothing about The Cocos Subduction Zone, even though it caused a devastating earthquake over ...
VelvetChimaera's user avatar
3 votes
0 answers
88 views

How can shake amplitude influence the damping ratio and resonant frequency of a soil base structure?

I have performed an experiment using a shaking table to simulate the response of a soil base structure to an earthquake. A multi-floor structure was placed on a sand (90% relative density) bed and the ...
Max's user avatar
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3 votes
0 answers
320 views

How to calculate seismic moment from seismograms?

I was told that Seismic moment is determined by the observed spectral levels of the receiving waves. But I don't quite understand what it means. How is this done in practice? Do you need ...
ye-ti-800's user avatar
  • 413
3 votes
0 answers
123 views

Can hurricanes set off earthquakes?

Large hurricanes can show up on seismographs. Do they do this by shaking the ground with wind? Moving large amounts of water putting weight on the tectonic plates? A large earthquake is the result of ...
futurebird's user avatar
3 votes
0 answers
73 views

Comparing the 4th of August 1998 earthquake to the 16th of April 2016 earthquake in Ecuador

I'm doing an assignment where I'm comparing the two mentioned earthquakes, and trying to figure out which factors played a role in the amount of casualties. In the 1998 earthquake there were only ...
Pame's user avatar
  • 131
2 votes
0 answers
35 views

Which position is more sensitive to feeling an earthquake?

There was an earthquake today in the NYC metro area. I know a few people that didn’t feel the earthquake while standing. Whereas everyone that was sitting felt it. Are those standing less apt to feel ...
Bacco's user avatar
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2 votes
0 answers
76 views

Could humans cause an earthquake?

I saw something that mentioned how, during the 2018 World Cup, after a victory, thousand of fans jumping simultaneously caused seismologists to detect the equivalent energy release of a magnitude 2.0 ...
Ethan's user avatar
  • 129
2 votes
0 answers
40 views

What is the maximum intensity with which an earthquake can struck Chitral city in Northern Pakistan?

I am working on a disaster response logistics case study in which I am using Mi-17 helicopters for transportation of relief to the affected areas in main Chitral city. In this regard, I want to ...
Engr. Moiz Ahmad's user avatar
2 votes
0 answers
132 views

Possibility of Domino Effect

Is there any likelihood that an earthquake could trigger a volcanic event? I'm thinking that because the Pacific tectonic plate nearly coincides with the "ring-of-fire," particularly along the west ...
J Hall's user avatar
  • 41
2 votes
0 answers
38 views

Earthquake data acquisition Geosig VE-53

Is it possible to receive data from a Geosig VE-53 to a PCI data acquisition (serial port) connected to PC and without using a recorder?
Mehdi ouahabi's user avatar
1 vote
0 answers
29 views

How fast and big would the waves be in the rocks from the Richter scale 10 earthquake at Chixulub

If I was near Australia and China when the 10km meteorite hit Chixulub 65 million years ago, the first thing I would have noticed is an earthquake high above magnitude 9, and the ground would shake by ...
bandybabboon's user avatar
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1 vote
0 answers
36 views

When rock cracks at tectonic plate boundaries are the number and size of cracks reflected in seismographs?

Do seismographs become more complex (waves of different frequencies superimposed on one another) for higher magnitude earthquakes where I am guessing there would be a larger variety and number of ...
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1 vote
0 answers
52 views

What is the relationship between earthquake risk, magnitude, and distance from the epicenter?

I need a (rough) functional relationship between these three quantities. My initial hypothesis is that the risk $R$ (intended as the probability of a building damage), scales with the square root of ...
AbateFaria's user avatar
1 vote
0 answers
14 views

How to add more outdoor weather sensors to Software Defined Radio (Weather Station)

How to add more outdoor weather sensors to Software Defined Radio (Weather Station) ? I am looking for seismographic outdoor radio sensors to work for Software Defined Radio (Weather Station). So ...
darius's user avatar
  • 11
1 vote
0 answers
25 views

Earthquake impacting opening of sealed drainage pits

Can earthquake causing cracks in the ground impact opening of sealed drainage pits in the ground?
Prashant Akerkar's user avatar
1 vote
0 answers
845 views

Igneous and Sedimentary Rocks' Susceptibility to landslide

Which is more susceptible to landslide based on lithology compared to one another? Granite, Conglomerate, Sandstone, Mudstone I've been tasked to create a hazard map and was given a Geologic Map, ...
Account 1 Shlope's user avatar
1 vote
0 answers
83 views

Seismology - PPV / VDV from geophone waveform data

I'm using an inexpensive seismometer to try and measure the effects of local HGV traffic on buildings. The device is connected to a Raspberry PI that has a Cirrus Logic Audio Card. The signal is fed ...
essexboyracer's user avatar
1 vote
0 answers
83 views

Applicable seismometers data?

I need to study low frequency range of seismic waves (~ up to 0.07Hz). Is it correct to use accelerometers data to compare with synthetic seismograms. Synthetic seismograms are calculated up to 0.07Hz....
Nikkey_love's user avatar
1 vote
0 answers
56 views

Interpretation of horizon display

I am currently working on a project that involves using seismic attributes as input parameters in a neural network for estimation of porosity and permeability for a reservoir. Now, I need to correlate ...
Faraz Gerrard Jamal's user avatar
1 vote
0 answers
70 views

What caused the earthquake in Kuwait on Nov 12, 2017?

What are the causes of the earthquake in Kuwait on Nov 12, 2017?
rowan's user avatar
  • 11
1 vote
0 answers
368 views

Effects of Mexican Earthquake in San Andreas Fault Line

Could the recent 8.1 Magnitude Earthquake at the Cocos and Nazca plates off the Mexican coast have a knock on effect to the Pacific and Juan de Fuca Plates further north at the San Andreas Fault Line?
Meteodeep's user avatar