[Realtime-feeds] Feed JSON field question

Matt Keller mattrk at mattrk.com
Mon Apr 14 23:13:04 UTC 2014


That's exactly what I needed to know. Thanks for clearing that up.

Out of curiosity, do you know why the data for areas outside of California
is delayed up to 30 minutes while California data is posted within a just a
few minutes? I understand that California has more earthquakes than
anywhere else and needs faster notifications but i was just curious why
this is from a technical side. Is this data prioritized somehow? Or are you
simply polling that equipment more often?

Thanks again.

On Mon, Apr 14, 2014 at 9:06 AM, Martinez, Eric <emartinez at usgs.gov> wrote:

> Hi Matt,
> The time field under features > properties corresponds to the *time at
> which the earthquake occurred*.
> The updated field under features > properties corresponds to the time the
> most recent update arrived. This can be driven by any preferred associated
> product (for example, the arrival of a ShakeMap product can affect the
> updated property).
> Updated earthquakes are *not* re-added to the past hour or past day
> feeds. Each feed for a given time period contains earthquakes that occurred
> within that time period. Subsequent updates to earthquake information do
> not affect what earthquakes appear in the feeds.
> Regards,
> Eric Martinez
> U.S. Geological Survey
> emartinez at usgs.gov
> On Fri, Apr 11, 2014 at 8:07 PM, Matt Keller <mattrk at mattrk.com> wrote:
>> Does the time field under features > properties correspond to the time at
>> which the earthquake occurred or the time at which the earthquake was
>> posted to the feed? From what I've read, earthquakes that happen in other
>> parts of the country (Not California) can be posted as much as 30 minutes
>> after the fact. I'm wondering what the time stamp actually means.
>> Additionally, are "updated" quakes re-added to the past hour or past day
>> feeds if they are updated significantly later? E.g. When a quake that
>> happened 26 hours ago is updated, Is that quake re-added to the past
>> hour/past day feed? I would assume not, but i wanted to verify. I'm
>> assuming that the data for that particular quake is simply updated and the
>> "updated" field is just incremented.
>> Thanks
>> _______________________________________________
>> Realtime-feeds mailing list
>> Realtime-feeds at geohazards.usgs.gov
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