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M 4.8 – 2024 Whitehouse Station, New Jersey Earthquake

earthquake.usgs.gov

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Re: M 4.8 – 2024 Whitehouse Station, New Jersey Earthquake

#351

Post by dietrichepp »

nwiswell wrote: post #347
dietrichepp wrote: post #343

Earlier quoted context omitted.

I can think of some ideas: parking the heads on hard drives is one. Magnetic hard drives are sensitive to vibration. You can shout at hard drives and measure the effects (video: https://www.youtube.com/watch?v=tDacjrSCeq4 ). One of the worst-case scenarios is a head crash. A head crash will damage the media and may result in data loss. https://en.wikipedia.org/wiki/Head_crash My guess is that earthquakes powerful eno…

Some other thoughts: - Personnel-level warning to immediately rerack servers, close racks, and get off ladders and away from fall hazards - Proactively spin up generators to reduce failover in the more-likely event of a power disruption - Potentially temporarily shut off very large circulation fans so that blades don't collide with the housings - Potentially stop and carefully restart cooling water loops, in case the…

Personally, I’d rather have the generators off when the earthquake hits!

Re: M 4.8 – 2024 Whitehouse Station, New Jersey Earthquake

#352

Post by geerlingguy »

joecool1029 wrote: post #349
q1w2 wrote: post #333

Earlier quoted context omitted.

Does anyone know if there's a real-time feed of Earthquakes somewhere? The USGS website doesn't post the Earthquakes until 10-15 minutes after it's over - which nullifies any type of automated warning for our data centers.

Need realtime seismographs, my friend's dad has one he built as a hobby up in quebec city that picked it up: https://alainmichaud.ca/

Another great site with a ton of citizen stations (some are placed next to USGS seismographs too): https://shakenet.raspberryshake.org

Re: M 4.8 – 2024 Whitehouse Station, New Jersey Earthquake

#353

Post by habibur »

bertil wrote: post #244
habibur wrote: post #205

5 km depth. That's of concern. Will shake a small region more violently than what a normal mag 4+ quake would have.

Is that deeper or shallower than usual?

Shallower than usual. Very shallow quakes happen at 10 km to 20 km depth. This one is at 5 km.

Re: M 4.8 – 2024 Whitehouse Station, New Jersey Earthquake

#354

Post by Ylpertnodi »

bickeringyokel wrote: post #213

Reading this on the toilet now wondering what my priorities would be if there was a quake in the next couple minutes.

I can honestly say it happened to me. It's a very strange experience- lasted about 40 seconds. I'm about 300km from where the epicenter was. The main thing i worried about was the building collapsing, and my state of dress and 'activity' would become the stuff of memes and "did you hear about....?" stories.

Re: M 4.8 – 2024 Whitehouse Station, New Jersey Earthquake

#356

Post by xattt »

secondcoming wrote: post #291
0_____0 wrote: post #285

Earlier quoted context omitted.

House I'm renovating here in the northeast had the concrete in the basement poured yesterday... Going to head over there to see if any weirdness occurred

Good way of removing any trapped air!

This one weird trick seismologists don’t want you to know about!

Re: M 4.8 – 2024 Whitehouse Station, New Jersey Earthquake

#357

Post by metaprinter »

joecool1029 wrote: post #262

So since I live near epicenter, there's one thing that changed geographically very recently. Nearby round valley reservoir was being worked on for years, last fall they got the authorization to pump it back to full and it was told it might take years. Rainy asf winter though so it's pumped back almost full from already 66% to 92% now. I'm wondering if billions of gallons of water getting added nearby affected pressur…

30% is 16.5 Billion gallons.

OP is saying that much rain got into a reservoir that sits on top of an ancient volcanic caldera and has no rivers flowing into? Unexpectedly? and they didn’t think to stop pumping water in from the South Branch or release some water?

The math ain’t mathing.

Re: M 4.8 – 2024 Whitehouse Station, New Jersey Earthquake

#359

Post by dylan604 »

jb1991 wrote: post #334
dylan604 wrote: post #326

Earlier quoted context omitted.

While not part of Tornado Alley, the west coast does get tornadoes. There was at least one when I lived there, and I think I heard about another within the past year (maybe two). The one when I lived there actually started as a waterspout and came across the beach near Santa Monica to be reclassified as a tornado.

I'm not sure how this thread got off on this tangent but I don't think there was ever any attempt to comment on whether there are or are not tornadoes on the west coast. The discussion was the lack of extreme events typical of the northeast.

It's more about the details left out really. I lived in LA area for ~5 years, and 1 tornado. In one Tornado Alley storm system, you can get multiple twisters. There's of course more than one storm system per season. It's also just weird knowing that for a tornado to hit places like Santa Monica and the knowledge that tornadoes usually travel southwest to northeast, and that there is no more land west of Santa Monica, that they are going to form as waterspouts. That's just unusual for typical experience for Tornado Alley folks.

Just another example of how one person's typical experience with storms can still be unusual when experience some place else.

Sure, my original comment was very ambiguous about what I've just posted, but that's how the tangent worked in my mind.

Re: M 4.8 – 2024 Whitehouse Station, New Jersey Earthquake

#360

Post by joecool1029 »

metaprinter wrote: post #357
joecool1029 wrote: post #262

So since I live near epicenter, there's one thing that changed geographically very recently. Nearby round valley reservoir was being worked on for years, last fall they got the authorization to pump it back to full and it was told it might take years. Rainy asf winter though so it's pumped back almost full from already 66% to 92% now. I'm wondering if billions of gallons of water getting added nearby affected pressur…

30% is 16.5 Billion gallons. OP is saying that much rain got into a reservoir that sits on top of an ancient volcanic caldera and has no rivers flowing into? Unexpectedly? and they didn’t think to stop pumping water in from the South Branch or release some water? The math ain’t mathing.

It's not at full capacity yet, they are pumping into it daily (around 200 million gallons) until it is. Only spruce run reservoir upstream of it fills naturally (and is spilling currently).

Operations data for the reservoir updates every morning during workdays, so we'll know Monday if they paused pumping into it after the quakes, I don't have any better than daily numbers for it. Letting the water down isn't an option, most of the downstream gauges on the south branch were just at or near flood stage. River gauges available here: https://water.weather.gov/ahps2/index.php?wfo=phi

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