4 ms·

That straight line in the map doesn't look like the maps for any earthquakes I've felt. It looks like it was on the Sagaing Fault which is a different type of f

That straight line in the map doesn't look like the maps for any earthquakes I've felt. It looks like it was on the Sagaing Fault which is a different type of fault from the ones I've experienced. https://en.wikipedia.org/wiki/Sagaing_Fault https://en.wikipedia.org/wiki/Sagaing_Fault

baq 2y ago
quoting from the 'Hazard' section: > The length of fault running 260 km (160 mi) from 19.2°N to 21.5°N, on the Meiktila segment, is designated a seismic gap due to the absence of major earthquake ruptures since at least 1897. At least 2 m (6 ft 7 in) of slip has accumulated along the fault corresponding to a magnitude 7.9 earthquake. Science did pretty well here with the magnitude. Wonder how much more research is needed to be able to predict an event let's say a full minute before it happens...
dnawy 2y ago
2023 Turkey-Syria Earthquake has a ShakeMap similar to this event [1]; We often think of the epicenter as a single point in earth where the energy then radiates outward. In reality, a fault is more similar to line [2]. The energy radiates outward around the entire fault line. (Note: since earthquake magnitude is correlated with the amount of area moved, it is safe to assume that larger earthquake will have larger fault rupture) [1] https://en.wikipedia.org/wiki/2023_Turkey%E2%80%93Syria_earthquakes https://en.wikipedia.org/wiki/2023_Turkey%E2%80%93Syria_eart... [2] https://earth-planets-space.springeropen.com/articles/10.1186/s40623-022-01650-1 https://earth-planets-space.springeropen.com/articles/10.118...
- SpicyUme 2y ago
  Interesting, the idea that a fault is a more of a line source makes sense it is hard for me to think of a way to have a single point source slip with enough energy. I guess I've thought in subduction faults the depth of the slip might explain why there is a point source. For example in the Pacific Northwest the earthquake from the Juan de Fuca plate look to be substantially deeper than this one. (50km vs 10km) Of course I expect the depth from today to be preliminary and be adjusted later, I can see the extent of red region in the shakemap changed to be longer from when I looked at it an hour or two ago. Do you know if the line source model comes from having more and better seismographs or has there been a change in how people think about the motion of a fault in an earthquake?

baq 2y ago

quoting from the 'Hazard' section: > The length of fault running 260 km (160 mi) from 19.2°N to 21.5°N, on the Meiktila segment, is designated a seismic gap due to the absence of major earthquake ruptures since at least 1897. At least 2 m (6 ft 7 in) of slip has accumulated along the fault corresponding to a magnitude 7.9 earthquake. Science did pretty well here with the magnitude. Wonder how much more research is needed to be able to predict an event let's say a full minute before it happens...

dnawy 2y ago

2023 Turkey-Syria Earthquake has a ShakeMap similar to this event [1]; We often think of the epicenter as a single point in earth where the energy then radiates outward. In reality, a fault is more similar to line [2]. The energy radiates outward around the entire fault line. (Note: since earthquake magnitude is correlated with the amount of area moved, it is safe to assume that larger earthquake will have larger fault rupture) [1] https://en.wikipedia.org/wiki/2023_Turkey%E2%80%93Syria_earthquakes https://en.wikipedia.org/wiki/2023_Turkey%E2%80%93Syria_eart... [2] https://earth-planets-space.springeropen.com/articles/10.1186/s40623-022-01650-1 https://earth-planets-space.springeropen.com/articles/10.118...

SpicyUme 2y ago
Interesting, the idea that a fault is a more of a line source makes sense it is hard for me to think of a way to have a single point source slip with enough energy. I guess I've thought in subduction faults the depth of the slip might explain why there is a point source. For example in the Pacific Northwest the earthquake from the Juan de Fuca plate look to be substantially deeper than this one. (50km vs 10km) Of course I expect the depth from today to be preliminary and be adjusted later, I can see the extent of red region in the shakemap changed to be longer from when I looked at it an hour or two ago. Do you know if the line source model comes from having more and better seismographs or has there been a change in how people think about the motion of a fault in an earthquake?