[CIG-SHORT] slip orientation for a nonplanar fault surface

[Brad Aagaard]

Jiangzhi,

I don't understand why you think prescribed slip won't work for a 
kinematic fault interface?

Regards,
Brad


On 10/20/2014 03:44 PM, Jiangzhi Chen wrote:
> The time scale is several hundreds of years, about one earthquake cycle.
>
> On 10/20/2014 03:34 PM, Brad Aagaard wrote:
>> Jiangzhi,
>>
>> What time scale are you modeling? PyLith should be appropriate if the
>> problem can be solved with infinitesimal or small strains.
>> Additionally, the fault formulation in PyLith breaks down when the
>> offset become large enough so that the slip vector would need to be
>> changing. We expect that a finite-strain formulation would be needed
>> as well for those types of problems.
>>
>> Regards,
>> Brad
>>
>> On 10/20/2014 03:24 PM, Jiangzhi Chen wrote:
>>> Thanks for the quick response. The region is part of the Cascadia
>>> subduction zone, where the Juan de Fuca plate moves northeastward and
>>> subducts. The aim is to understand how the subduction influences the
>>> surface displacement field, and explains the geodetic observation. The
>>> upper slab interface is supposed to be a dynamic fault surface, and the
>>> lower interface is a kinematic surface. For now, I am using two
>>> kinematic surface just to make the slab go under.
>>>
>>> Jiangzhi
>>>
>>> On 10/20/2014 03:08 PM, Brad Aagaard wrote:
>>>> Jiangzhi,
>>>>
>>>> I don't understand what you are trying to do. What research question
>>>> are you trying to answer? What do you want to learn from the
>>>> simulation?
>>>> What are your observations/constraints?
>>>>
>>>> Regards,
>>>> Brad
>>>>
>>>>
>>>>
>>>> On 10/20/2014 03:02 PM, Jiangzhi Chen wrote:
>>>>> Hi everyone,
>>>>>
>>>>>      I am working on a subduction simulation, where the fault
>>>>> interface
>>>>> is nonplanar, and the subduction slab moves in northeast direction
>>>>> at 4
>>>>> cm/year before it meets the overriding plate. My question is how I can
>>>>> specify the kinematic fault interface. It is not appropriate to use
>>>>> predefined slip functions, because the slip rates depend on the
>>>>> location
>>>>> which is changing with time. Is there a way to make this work? Any
>>>>> help
>>>>> is appreciated.
>>>>>
>>>>> cheers,
>>>>> Jiangzhi
>>>>>
>>>>>
>>>>>
>>>>>
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