[Realtime-feed-users] Nodal plane params

[Fee, Jeremy]

Hello,

Thanks for your question.  There is some information about focal mechanisms
and moment tensors on this page, we will work to improve this documentation
in the future:

https://earthquake.usgs.gov/data/comcat/data-products.php#fm



Generally, you should prefer Moment Tensor information over Focal Mechanism
information because more data is used and the results are more accurate.

Inspecting the derived magnitude type can provide more information about
the type of data used in the inversion.


Thanks,

Jeremy Fee
Computer Scientist
USGS Geologic Hazards Science Center, Golden, CO


On Wed, Jul 10, 2019 at 8:48 AM Sergey Kolesov <kolesov at ocean.phys.msu.ru>
wrote:

> Hello,
>
> We poll '4.5_week.geojson' feed for focal mechanisms of Mw6+ earthquakes.
> Nodal plane angles resided under 'details' -> ... -> 'moment-tensor' ->
> 'properties' at least for last 1.5 years.
> Recently, I found that for  'ci*' events nodal plane angles are now under
> 'focal-mechanism' -> 'properties', but for 'us*' location remains the same.
> Is there are any docs on data layout depending on event id?
>
> Regards, Sergey.
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