Hey all, I need some help form you experts. I live in a small community in Northern BC. For the past month or so we've been experiencing small sudden "earthquakes". Sometimes there will be a noise, like a short explosion, sometimes it's just a shake that rattles the windows. They're very short and might happen at least once a day now. Where we are has a lot of Oil & Gas activity - some people say that has something to do with it and others are adamant that's impossible. I feel crazy as people don't seem bothered? I'd like to collect 'real' data rather than just writing down the time when it happens. You know, have some REAL concrete proof that SOMETHING is going on. Is what I'm describing sounding like seismic activity? and if so, would something like the Raspberry Shake be useful for a complete newbie or do you have any other tech suggestions?

There was an earthquake in Portugal on Nov 8th 1705, which a family member found in the original death records by the church during the era.

It was strong enough that several people died, and village priests wrote about it, but I found no record of it in anything modern. Is this important enough for anyone to care about? Not sure what to do with this discovery

Hello, being ignorant of the topic I thought I better ask. I have 60 meters well, and lately, I've seen changes in multiple factors of the water: it started with a change in the taste which became more "rocky" than used to be. Now the level is changing as I get air in the pipes and I have no leaks or breaks, it's like 5+ meters change without heavy consumption. After starts containing more gases, the water comes out white and then turns transparent which never did.

As we have no fracking activities here in Bulgaria, the region is around Gorna Malina (35km from Sofia), I'm wondering if, should expect some event. What other factor should I look for?

Thank you

Would climate change affect tectonic movements? With the world's weather patterns shifting and places warming up that usually weren't, would/could this accelerate plate movements at all?

I have a friend who believes earthquakes are getting worse. I've found websites that say things like "the prevalence and intensity of earthquakes have not shown a significant increase over geological timescales" but I can't find actual data or a credible source making this statement. Can you refer me to anything? Thanks.

An Iranian website about the project

Hi. I live in Northerns CA, we had a 6.8 earlier in the year and a whole series of aftershocks, a 4.8 recently.
As the weather has begun to turn towards the rainy season I have been paying attention to areas of water intrusion on the space I rent for my business, slight cracks in the stucco that had been patched are now open, and seem to be wider, hairline to 16th of an inch maybe more in the last 6 months.

I'm not worried particularly about that building, it is beefy timber framed with 2x6 solid redwood stud walls. Water will get in when it rains but will probably be fine in the next shake up.

However I live in an old building, on the third floor. It has seismic retrofitting, but not the beefy stuff with the big diagonal steel etc. etc.

How long does it take for a building to settle after a quake, and what would it sound like? We have this tic tic tic sound that seems to be coming from one wall then the next, repeating over and over. There aren't obvious sources like ducts, electrical or plumbing.

We have some slight cracks inside, and the external stucco has cracks in other parts of the building.

I'm trying to decide if the sound is the old wood shrinking with the weather change (its very slight) or if there are stresses the building is just settling into after the shake up. My partner has been here a long time and the sound is new.

Hi, there!

I'm looking for advice about DIY hobbyist seismometers and hoping we can create a solution together. In about 2 weeks, I'll be helping host and event to promote the STEM fields. For the event, teams will be launching pumpkins towards a target on trebuchets of various designs and sizes that was built by each team! One of the winning categories will be "best waveform" -- however, my hardware engineer and I (the programmer) cannot seem to get good seismic data off of our self-made hobbyist kit. I don't know if we have the parts mounted wrong in the box, or aren't coupling our device to the ground well enough / too much / etc... Would appreciate any advice you all can offer -- especially device design ideas, sensor board recommendations, and the like.

Setup: We have an NVIDIA Jetson board with a SparkFun ICM20649 card that provides Accelerometer/Gyro/Magnetometer capabilities in nine degrees (3 each) of freedom. This is mounted in a Pelican iM2075 "Storm Case" - a basic hard plastic black box. We also have a SparkFun ADS1015 Analog-Digital Converter card connected in the same box w/ an old professional grade Chaparelle infrasound sensor connected that we procured from old surplus items.

We've set this up and ran some basic tests with sandbags dropped various distances away from the sensor. However, we cannot for the life of us figure out why our signal collection is so poor! The 20649 card is mounted directly to the bottom of our pelican case and the infra-sound hose connected to the Chaparelle box is laid out in a spiral pattern around the Pelican case.

So even with all of that, we can't seem to get solid signals from the box. Any recommendations on how we can improve our collected waveforms would be most appreciated. It would be awesome to showcase some cool seismology science every time a pumpkin hits the ground and encourage folks to persue a STEM career... But we can't do that until we can figure this out. Any advice/recommendations are greatly appreciated. I'm cross-posting to r/geophysics as well in case that is the more appropriate place to ask my question.

Thanks!

I have a question that I think there is no right or wrong answer to it.

Do you think we as homosapians or ready or prepared for the inevitable “Big One” mega quake??

https://docs.google.com/forms/d/e/1FAIpQLScKfRZtriFl2g3E7JgrsYgokMgeTj7kHFSnQ9DScZnSAWxhAg/viewform?usp=sf_link

I live in North Carolina, in the US. According to govt sources we don't have active faults in our area. We're in the western part of the state, in the Smoky Mountains. In the last two weeks we have had 7 earthquakes. They occur 2-3 events within a short period of each other (minutes or hours). They have all originated in a very small area, almost from the same spot, except the most recent one that was further, but still less than 1 km away.. Magnitude has been between 2 and 3.2.

My questions are

1. Would this be considered a swarm?

2. What are the possible causes of earthquakes in my area?

TIA!

Hello everyone!

I'm having trouble trying to load a custom velocity model in TauP class. The velocity model is in tvel format, and I'm trying yo load it using taup_create.build_taup_model().

I get the following error: SlownessModelError: No layer contains this depth.

I get this error even trying to use the ak135 model (copied in a tvel file).

Can anyone help me?

I'm writing a story and it features an extensive mine that was converted into a fortified megabunker that's a hundred kilometers of unmapped labyrinth built into a mountain. Can you give me a rough estimate of how well reflection seismology could map something like this? Can it detect a hallway 2 meters wide a kilometer under the earth? How about a room? How about a cafeteria?

What location on Earth is the core measured from? how is the central core found? How do scientists know the liquid detected in the in P waves isn't just some ocean?

First up, how realistic is the 64% chance of earthquake in Istanbul until 2030? Anyone have any insights on that?

Secondly is this calculation for a 10-day visit correct? (10÷(7×365))×,64=0.0025 So quarter percent chance?

We're planning a visit for a wedding in June and I'm terrified to death. The social pressure to go is enormous.

Need advice for tsunami preparedness in Tel Aviv

Need advice on Tsunami source

I'm working on the Tel Aviv tsunami earth cache regarding tsunami preparedness, like the beach markings that Tel Aviv has on almost every beach, and tsunami evacuation routes. the early warning system they have for those near Gaza and occupied territories, of incoming missiles, and earthshaking that comes from them. I figure that it's likely that if there was advanced knowledge of nearly enough earthquakes, the early warning system could also be used as an early warning system for natural events. What resources could I use for my earth cache?

I'm looking at a property and spoke with the architect. He said that they built to the standards of 'Long Beach California' as if those standards were higher than local standards.

I've been trying to get some sort of quantitative understanding of just what this means.

Looking at the Long Beach municipal website, it seems they just follow California building codes for new construction.

So, I'm wondering, if a building was built a decade ago to california' standards, what does that even mean ( to a layman like me)?

I'm trying to understand like 'it has a 99% chance of standing in habitable condition after a 7.9 earthquake that lasts for 20 seconds.' Or whatever parameters they use.

and then see similar statements for other states.

Where can I find this? My google-fu is failing me, and chatgpt refuses to be my data digger.

What hardware and software are you using?

Sorry for stupid question, but I wasn't able to figure it out by googling

In the recent earthquake in Turkey, the land shifted for a few meters creating the giant crack. But where would the "excess" land go? I mean if shifted land created a gap there, there shall be another side of shifted land where it hit supposedly a static piece of another land and created some hills/mountains? Why don't we see another end in the news?

I'd like to visit Instanbul but my Turkish friend says it's best to leave it a year or two as they thinkn a big one is now more likely in Istanbul. I've googled this and the most scientific thing I've found is a statement from a seismology professor in Turkey saying it is due 'some time'.

Does the recent quake in Soouthern Turkey make a quake in Istanbul more likely? Can anyone point me in the direction of some decent science on the correlation of quakes?

For example, to relieve accumulated stress?

Thanks to anyone who can explain 🙏

Hi , I own a couple of a 0.5- 1 acre plots of land in the SoCal Desert area and I'm interested in putting a seismograph on one of the plots. But I don't know it that is something that is something that a company would pay for. If anyone could point me in the right direction or maybe give me a name of a company to talk to. Thank you for taking the time to read this.

hello all, i have this code to obtain the Fourier Amplitude Spectrum (FAS) from a seismic record. but I'm no sure if this code is right

​

function [f,A]=Four(EQ,dt)
m=nextpow2(length(EQ));
N=2^m;
df = 1/(N*dt); % frequency interval for FFT
% Fast Fourier of the time series.
fasy=fft(EQ,N); % The fast Fourier transformation is done by using N points.
% The program pads the time series with  trailing zeros.
f=(0:N/2-1)*df; % frequency axis
A=dt*abs(fasy(1:N/2));
return

if you see, when the code obtain 'A' (the FAS) multiply the abs(fasy(1:N/2)) and dt, so my question is, multiply by dt is correct?

I think that it is incorrect, but I'm no sure.

Hydrophone component used for any data correction during the process stage? Why is the pressure measurement important when it comes to OBS?