these systems were set up about 20 years ago after the Thailand tsunami. Have there been notable results from their application?
Tsunami Warning for Northern California
61–70 of 177 posts
Re: Tsunami Warning for Northern California
#62FORECASTS 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.
Is that webcam guaranteed to be a live/up to date feed? regardless I'd imagine there to be some confirmation by now.
Re: Tsunami Warning for Northern California
#63How do Tsunami Warnings work? For a Midwesterner a Tornado Warning requires someone to see it, or be be detected by radar. It's usually a good indicator that it is highly likely that the tornado exists and it is actively doing its thing somewhere. Warnings are pretty specific and almost always involve the thing happening. Tsunami though, would it have to exist as far as seeing it on the coast, or is this more of a "c…
i believe they have monitoring deep ocean buoys
How do these detect tsunamis? They must be observing elevation changes, right? Is that GPS based?
Re: Tsunami Warning for Northern California
#64This 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.
Here is a yt link if that site gets overloaded https://www.youtube.com/watch?v=ESsx4MdloQw
Re: Tsunami Warning for Northern California
#65Earlier quoted context omitted.
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.
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
Re: Tsunami Warning for Northern California
#66Re: Tsunami Warning for Northern California
#67Earlier quoted context omitted.
i believe they have monitoring deep ocean buoys
How do these detect tsunamis? They must be observing elevation changes, right? Is that GPS based?
i think they monitor pressure waves somehow
here is an interactive map, looks like some of them are picking up something https://www.ndbc.noaa.gov/obs.shtml?lat=13&lon=-173&zoom=2&p...
Re: Tsunami Warning for Northern California
#68Based on the location and focal mechanism of the earthquake (https://earthquake.usgs.gov/earthquakes/eventpage/nc75095651...), this is a strike-slip earthquake on the plate boundary between the Pacific and Gorda/Juan de Fuca plates. Strike-slip earthquakes occur when two plates slide beside each other during an earthquake, usually along a steeply-dipping if not vertical fault. These kinds of earthquakes almost never produce damaging (or even really noticeable) tsunamis because there is no real displacement of sea water by seafloor movement, unlike a thrust or subduction zone earthquake.
The USGS's automated systems calculate the location and focal mechanism/moment tensor pretty much instantly from the seismic network. The system should know that a significant tsunami is unlikely based on the parameters of the earthquake. On the one hand, it's good to be cautious, but on the other hand, a system designed to cry wolf is also self-undermining. Maybe they should have a tiered warning system?
Re: Tsunami Warning for Northern California
#69From https://www.tsunami.gov/events/PHEB/2024/12/05/24340001/2/WE...
TSUNAMI THREAT FORECAST...UPDATED ---------------------------------
* THERE IS NO LONGER A TSUNAMI THREAT FROM THIS EARTHQUAKE.