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Tsunami Warning for Northern California

tsunami.gov

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Re: Tsunami Warning for Northern California

#71

Post by Polizeiposaune »

whalesalad wrote: post #19

FORECASTS OF TSUNAMI ACTIVITY ----------------------------- * Tsunami activity is forecasted to start at the following locations at the specified times. FORECAST START SITE OF TSUNAMI ---- ---------- * California Fort Bragg 1110 PST Dec 5 Crescent City 1120 PST Dec 5 San Francisco 1210 PST Dec 5 * Oregon Port Orford 1120 PST Dec 5 Brookings 1125 PST Dec 5 Charleston 1140 PST Dec 5 via https://www.tsunami.gov/events/P…

There is now an updated notice timestamped at 11:24 Pacific time:

https://www.tsunami.gov/events/PAAQ/2024/12/05/so1aq0/2/WEAK...

which (still) says:

* No tsunami observations are available to report.

And another one at: https://www.tsunami.gov/events/PHEB/2024/12/05/24340001/2/WE...

intended for a worldwide audience which says:

  * THERE IS NO LONGER A TSUNAMI THREAT FROM THIS EARTHQUAKE.

Re: Tsunami Warning for Northern California

#72

Post by gbnwl »

adastra22 wrote: post #12

This webcam should let us know in a few minutes if this is real: https://www.pacificblue.biz/noyo-harbor-webcam/ Edit: arrival time has come and gone. No indication of movement in water level.

Well I didn't see a Tsunami but thanks to this thread I do have a few nice live streams of pleasant water views going. Kind of relaxing tbh.

Re: Tsunami Warning for Northern California

#73

Post by lawlessone »

OsrsNeedsf2P wrote: post #65
lumost wrote: post #62

Earlier quoted context omitted.

Is that webcam guaranteed to be a live/up to date feed? regardless I'd imagine there to be some confirmation by now.

There's a timestamp in the top right, so yes. Looks like no tsunami

I just seen two people walk by... seems like a bit of a gamble to do that.

Re: Tsunami Warning for Northern California

#74

Post by numpad0 »

quietthrow wrote: post #33

Interesting observation: I am in a circumstance where I am transitioning from an Android phone (Samsung Galaxy) to a iPhone. I observed that android phone alerted me about an earthquake and that I should be ready to feel tremors. To my surprise as I was pondering how this system works - especially wrt to latency - where it alerts me head of time, I then fell small tremors in 2 or 3 seconds after the alert. The tremor…

LTE ETWS/PWS is mandatory feature, iPhones has the same thing. Maybe you've explicitly disabled it, considering (IIUC) US used it for AMBER alerts and had annoyed lots of people at some point.

Generally an earthquake warnings are issued by someone always automatically correlating sensors everywhere, USGS and/or NOAA in case with US, and then cellular carriers broadcasting the alert through LTE feature. This does not work without participating local equivalent of USGS deploying a sensor network and running its computers wired to carriers.

This feature is carrier agnostic, enabled by default, and mandatory on phones; it's specifically designed to deliver earthquake early warnings. It does not matter if it's Android, iOS, or something else altogether. Any phones, SIM locked or unlocked, with or without SIM, should start blaring the alert so long it hears the signal.

ref: https://en.wikipedia.org/wiki/Cell_Broadcast

Re: Tsunami Warning for Northern California

#78

Post by [deleted] »

Polizeiposaune wrote: post #71
whalesalad wrote: post #19

FORECASTS OF TSUNAMI ACTIVITY ----------------------------- * Tsunami activity is forecasted to start at the following locations at the specified times. FORECAST START SITE OF TSUNAMI ---- ---------- * California Fort Bragg 1110 PST Dec 5 Crescent City 1120 PST Dec 5 San Francisco 1210 PST Dec 5 * Oregon Port Orford 1120 PST Dec 5 Brookings 1125 PST Dec 5 Charleston 1140 PST Dec 5 via https://www.tsunami.gov/events/P…

There is now an updated notice timestamped at 11:24 Pacific time: https://www.tsunami.gov/events/PAAQ/2024/12/05/so1aq0/2/WEAK... which (still) says: * No tsunami observations are available to report. And another one at: https://www.tsunami.gov/events/PHEB/2024/12/05/24340001/2/WE... intended for a worldwide audience which says: * THERE IS NO LONGER A TSUNAMI THREAT FROM THIS EARTHQUAKE.

[deleted]

Re: Tsunami Warning for Northern California

#80

Post by s1artibartfast »

sytse wrote: post #44
whalesalad wrote: post #19

FORECASTS OF TSUNAMI ACTIVITY ----------------------------- * Tsunami activity is forecasted to start at the following locations at the specified times. FORECAST START SITE OF TSUNAMI ---- ---------- * California Fort Bragg 1110 PST Dec 5 Crescent City 1120 PST Dec 5 San Francisco 1210 PST Dec 5 * Oregon Port Orford 1120 PST Dec 5 Brookings 1125 PST Dec 5 Charleston 1140 PST Dec 5 via https://www.tsunami.gov/events/P…

I should have hit Fort Bragg by now but I'm not seeing that on https://www.noyocenter.org/live-web-cam The earthquake was real but it is probably really hard to predict if that leads to a tsunami.

I was watching the crescent city webcam and watched the fishing boats rushing out of the harbor after the quake. The webcam is now down, so I hope they made it.

Crescent city has a long history of being devastated by norcal quakes due the the bathymetry and costline profile.

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