Event based PSHA - decrease the "step" between events

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alexandre dunant

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Jan 19, 2021, 9:14:43 PMJan 19
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Hi,

I am trying to run OQ to generate event based PSHA from a complex fault geometry.
Here are the results I got:

image.png

I am trying to reduce the "step size" between line of events (if it makes sense). What parameter would control that in the context of an event based PSHA ?

Thanks !

Alex

Marco Pagani

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Jan 20, 2021, 2:12:03 AMJan 20
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Hi Alexandre,
Sorry for missing your previous message. Did you try to increase the complex_fault_mesh_spacing
Marco

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alexandre dunant

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Jan 25, 2021, 5:37:44 PMJan 25
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Hi Marco,

Thanks it worked - Here is a picture of the magnitude 7.25Mw only.
Are the points location always randomly distributed or is there a way to create a regular grid based on the scaling relationship (Strasser 2010 in this case) ?

Thank you!

Best regards,
Alex

image.png


Marco Pagani

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Jan 27, 2021, 2:37:16 AMJan 27
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Hi Alex,

I guess the red points are the hypocenters of ruptures in a stochastic event set produced by OQ.

Unfortunately is not possible with this calculation procedure to distribute then evenly over the fault surface.

Best wishes,

Marco




alexandre dunant

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Jan 27, 2021, 3:22:49 AMJan 27
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Thanks a lot Marco,

Just wanted to check, the results should be good enough for our purpose. 

Best, 
Alex 


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