This piqued my interest, so I did a quick search with a couple of different phrases and I found… nothing. However, I did learn that since 1976 Guatemala has had several major earthquakes ranging from M6.8-7.5, so it’s ACTIVE. They have several major faults that get pressed on both the Pacific and Caribbean sides, 3 active volcanos and seems like it’s generally very nasty, seismically speaking.
Absent known/published force factor values, if I was pressed I would look to where we’ve historically had similar quakes (i.e. 7.0+) and the two regions I’d benchmark are Prince William Sound, Alaska and the San Francisco Bay area. We actually had a 7.2 about 2 hours east of San Diego in 2010 (Calexico) but that region isn’t rated as high as others. I think using the highest value you can find from USGS is a solid Plan B. My opinion only, Steve L. From: Ben Young <[email protected]> Sent: Wednesday, May 01, 2024 9:04 AM To: 321 via Sprinklerforum <[email protected]> Subject: [Sprinklerforum] Seismic data outside the US Does anyone know where I can find seismic data, specifically for Guatemala? I found FM Global 2-1 and its maps give you the 50 year zone, which gives Sd1 and Sds, but I need Ss for doing the seismic braces. Don't know how to get from Sd1 and Sds to Ss though, if that's even possible. Any pointers in the right direction would be appreciated. Thanks, Benjamin Young
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