2 ms·

That's unavoidable. We now have shake alerts in CA but if the quake happens on the Hayward fault across the bay San Francisco isn't going to get much warning no

That's unavoidable. We now have shake alerts in CA but if the quake happens on the Hayward fault across the bay San Francisco isn't going to get much warning no matter what anyone does. By best estimates we may get 15s of warning.

Hobadee 2mo ago
15s is enough to book it to a close stairwell in some cases. I used to work in a dodgy building in the city. Any time one of those shake alerts hit, I would sprint to the stairwell and everyone would look at me funny. Jokes on them when the big one hits!
- fragmede 2mo ago
  Depends. Surving means you have to deal with the aftermath. That's not going to be pretty.
- xenadu02 2mo ago
  I agree and I'm glad we have the alerts. I'm just saying we may not get any warning and that's nobody's fault. I'm also thankful that we have at least some seismic standards and have continued to increase them. Look at how a country like Chile fares where they don't just have standards they enforce them. You can't bribe your way out of proper seismic engineering for the most part. Then look at Columbia which technically has NSR-10 but enforcement is... not exactly stringent. The results are obvious. Where standards are lax or just as importantly enforcement is lax structures collapse and people die. Where the standards are good and taken seriously damage is much less severe. Even here in San Francisco things are not all perfect. Sometimes things slip through the cracks like the Millennium Tower. Others are known: the city has a special seismic hardened firefighting pipe network with big metal rods that clamp the pipes together to prevent joints from coming apart. With special seawater pumps and even ship-based seawater hookups so if all else fails they can pump vast volumes of seawater into that network... yet that network has absolutely massive gaps that have been known about for decades and still exist but there are no plans to expand it whatsoever. You'd think the city would continuously invest in this system to slowly expand it over time even if just a bit. But nope.
robocat 2mo ago
Need a rumble alert
ncr100 2mo ago
Nice, 15s to move from underneath an unstable object or understand why the freeway is collapsing

Hobadee 2mo ago

15s is enough to book it to a close stairwell in some cases. I used to work in a dodgy building in the city. Any time one of those shake alerts hit, I would sprint to the stairwell and everyone would look at me funny. Jokes on them when the big one hits!

fragmede 2mo ago
Depends. Surving means you have to deal with the aftermath. That's not going to be pretty.
xenadu02 2mo ago
I agree and I'm glad we have the alerts. I'm just saying we may not get any warning and that's nobody's fault. I'm also thankful that we have at least some seismic standards and have continued to increase them. Look at how a country like Chile fares where they don't just have standards they enforce them. You can't bribe your way out of proper seismic engineering for the most part. Then look at Columbia which technically has NSR-10 but enforcement is... not exactly stringent. The results are obvious. Where standards are lax or just as importantly enforcement is lax structures collapse and people die. Where the standards are good and taken seriously damage is much less severe. Even here in San Francisco things are not all perfect. Sometimes things slip through the cracks like the Millennium Tower. Others are known: the city has a special seismic hardened firefighting pipe network with big metal rods that clamp the pipes together to prevent joints from coming apart. With special seawater pumps and even ship-based seawater hookups so if all else fails they can pump vast volumes of seawater into that network... yet that network has absolutely massive gaps that have been known about for decades and still exist but there are no plans to expand it whatsoever. You'd think the city would continuously invest in this system to slowly expand it over time even if just a bit. But nope.

robocat 2mo ago

Need a rumble alert

ncr100 2mo ago

Nice, 15s to move from underneath an unstable object or understand why the freeway is collapsing