[Realtime-feed-users] Duplicate Fiji earthquakes last night

[Rogers, Wesley A]

Thanks, that is good information

Yours,
Wesley A Rogers
SSG Security & Fire Protection
The Boeing Company
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From: Realtime-feed-users [mailto:realtime-feed-users-bounces at geohazards.usgs.gov] On Behalf Of David
Sent: Sunday, May 29, 2016 7:02 AM
To: 'James Richards' <james at artisanglobal.com>; realtime-feed-users at geohazards.usgs.gov
Subject: Re: [Realtime-feed-users] Duplicate Fiji earthquakes last night

Hi James,

My understanding is this. The pt reference is from the Pacific Tsunami centre. This is usually the first event to show. The us reference is the usgs reference and takes a little longer to be promulgated as it is not quite as raw data as the pt reference, but still subject to revision.

Once the us reference has been listed the pt reference is taken off, normally within a very short space of time after the listing of the us event.

This is a normal course of events for the larger earthquakes.

Kind regards
David Loring

From: Realtime-feed-users [mailto:realtime-feed-users-bounces at geohazards.usgs.gov] On Behalf Of James Richards
Sent: 28 May 2016 16:20
To: <realtime-feed-users at geohazards.usgs.gov<mailto:realtime-feed-users at geohazards.usgs.gov>> <realtime-feed-users at geohazards.usgs.gov<mailto:realtime-feed-users at geohazards.usgs.gov>>
Subject: [Realtime-feed-users] Duplicate Fiji earthquakes last night

Hi Jeremy,

Friday night at around 10:45 - 11:00 pm Pacific Time, I observed that two earthquakes were appearing separately in the real time data feed located SE of Fiji. The associated quake IDs were pt16149050 and us20005yqp. A short time later the quake with ID pt16149050 disappeared from the feed and was instead listed as an alternate quake ID in the ids property for us20005yqp.

Can you tell us anything about what caused this, and what the proper terminology is for such occurrences? For example, is this what you would call a “ghost” event?

Also, is there an errata associated with the real time feeds where we can verify any mistaken events that may have been reported and withdrawn? I couldn’t find anything on earthquake.usgs.gov<http://earthquake.usgs.gov> about that particular quake pt16149050 being in error.

Thanks in advance!

Kind regards,
James

James Richards
Artisan Global LLC
james at artisanglobal.com<mailto:james at artisanglobal.com>

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