<div dir="ltr"><div>One last field question regarding the ID of each event. The geoJSON glossary for the realtime-feed states that the {features:[id: String]} field is the unique identifier for the event. It states, however, that the ID may change over time. It then refers to the {features:[properties: {ids: String}]} field for all of the IDs associated with an event. How does this actually play out in the feed in real life? Lets say an earthquake happens with the ID of 1. This shows up in both the ID and the properties:IDs field. How/when would the ID change? I get that the new ID would be added to the list of IDS. I just don't understand why the original ID would change. <br>
<br></div>For my application, i just need to track an event with some kind of unique identifier. I would not want to duplicate the event if the ID suddenly changed. I'm just curious how the process works and if i need to worry about it. I might also mention that i'm only monitoring the all_hour feed. So it may not be a huge deal for that particular feed. <br>
<br>Thanks again for everyone's input. As a programmer (and not a scientist), this information has helped a lot.<br></div><div class="gmail_extra"><br><br><div class="gmail_quote">On Tue, Apr 15, 2014 at 11:58 AM, Renate Hartog <span dir="ltr"><<a href="mailto:jrhartog@uw.edu" target="_blank">jrhartog@uw.edu</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">For completeness sake, not only the California regional networks submit their near-real time automatic solutions to the NEIC, several others do as well. For example, the Pacific Northwest Seismic Network (PNSN), which covers Washington and Oregon State also does. We do use some quality criteria that have to be met before an automatic solution gets sent, among other things, it has to have an initial magnitude estimate of 1 or bigger. If it does not meet those very basic requirements, the solution won't get sent until someone actually reviews it. Our automatic solutions should show up within about 5 minutes of the origin time of the earthquake. We do have fewer earthquakes than in California, so they may not show up in the real-time feeds very frequently.<div>
<br></div><div>-Renate (research staff at PNSN)</div><div class="gmail_extra"><div><div class="h5"><br><br><div class="gmail_quote">On Mon, Apr 14, 2014 at 4:16 PM, Earle, Paul <span dir="ltr"><<a href="mailto:pearle@usgs.gov" target="_blank">pearle@usgs.gov</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div style="font-size:small">Matt,</div><div style="font-size:small"><br></div><div style="font-size:small">
California has more seismic stations and post automatic solutions. Most other regions in the U.S. do not post automatics.</div>
<div style="font-size:small"><br></div><div style="font-size:small">regards,</div><div style="font-size:small">Paul</div></div><div><div><div class="gmail_extra"><br>
<br><div class="gmail_quote">On Mon, Apr 14, 2014 at 5:13 PM, Matt Keller <span dir="ltr"><<a href="mailto:mattrk@mattrk.com" target="_blank">mattrk@mattrk.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div dir="ltr"><div><div><div>Eric, <br><br></div>That's exactly what I needed to know. Thanks for clearing that up. <br><br></div>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? <br>
<br></div>Thanks again. <br></div><div><div><div class="gmail_extra"><br><br><div class="gmail_quote">On Mon, Apr 14, 2014 at 9:06 AM, Martinez, Eric <span dir="ltr"><<a href="mailto:emartinez@usgs.gov" target="_blank">emartinez@usgs.gov</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">Hi Matt,<div><br></div><div>The time field under features > properties corresponds to the <b>time at which the earthquake occurred</b>.</div>
<div><br></div><div>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).</div>
<div><br></div><div>Updated earthquakes are <b>not</b> 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.</div>
<div><br></div><div>Regards,</div><div><br></div><div>Eric Martinez</div><div>U.S. Geological Survey</div><div><a href="mailto:emartinez@usgs.gov" target="_blank">emartinez@usgs.gov</a></div></div><div class="gmail_extra">
<br><br><div class="gmail_quote"><div><div>
On Fri, Apr 11, 2014 at 8:07 PM, Matt Keller <span dir="ltr"><<a href="mailto:mattrk@mattrk.com" target="_blank">mattrk@mattrk.com</a>></span> wrote:<br></div></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div><div>
<div dir="ltr">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. <div>
<br></div><div>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. </div>
<div><br></div><div>Thanks</div></div>
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<br></blockquote></div><br><br clear="all"><div><br></div></div></div><span class="HOEnZb"><font color="#888888">-- <br>Renate Hartog<br>Research Scientist<br>Pacific Northwest Seismic Network<br>Department of Earth and Space Sciences<br>
University of Washington<br>Box 351310<br>
Seattle, WA 98195<br><br>Tel. <a href="tel:%2B1-206-685-7079" value="+12066857079" target="_blank">+1-206-685-7079</a> (office)<br>
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