Hello, i am a little bit confused regarding the K1 and K2 constants in Area sources. Does r crisis first calculate the rupture area and then the radius of the rupture circle, or the other way around? For example i can see that : R=K1*exp(K2*M), and i need to insert K1 and K2. What is R? Is it the rupture length (SSRL or SRL), the rupture width, or something else? For normal faulting i can select the following: Wells and Coppersmith (Normal): K1=0.0207, K2=0.944. I can find no correlation with any of the a and b constants given by wells and Coopersmith. Can you tell me the original equation for which K1 and K2 where calculated and the followed steps? Thank you in advance.
K1 and K2 Constants
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- Last Post 10 December 2019
Nikos Vavlas
posted this
10 February 2019
Content_Manager
posted this
03 April 2019
- Last edited 03 April 2019
Dear Nikos,
In the following link, you will find a document with the explanation about how R-CRISIS calculates the rupture area/length and how the Wells & Coppersmith (1994) coefficients are related with R-CRISIS.
I hope this solves your questions.
If you have any question about it, do not hesitate to contact us.
Thank you for your preference and interest in R-CRISIS.
Best regards,
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Edwar Q S
posted this
10 December 2019
- Last edited 10 December 2019
This helped me. However, I would like to know how the hypocenter is determined. Could you recommend some paper for this?
Content_Manager
posted this
10 December 2019
Dear Edwar,
The hypocenters are determined from the geometry of the seismic sources, the subdivision restrictions, its seismic parameters and if the type of the source allows taking place rupture areas outside from itself.
The algorithm is not available for the public but you can get the Event Set for a certain location, and in that file you will find all events' hypocenters that describe the seismic hazard for the selected point. For more information about Events Set, you may look for it in the R-CRISIS Help Menu.
Thank you for your preference and interest in R-CRISIS.
Best regards,
