<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:x="urn:schemas-microsoft-com:office:excel" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"><head><meta http-equiv=Content-Type content="text/html; charset=us-ascii"><meta name=Generator content="Microsoft Word 14 (filtered medium)"><title>Re: NextGen EQMaps Beta</title><style><!--
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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Courier New";color:#1F497D'>Hi Mike,<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Courier New";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Courier New";color:#1F497D'>The M<1 quake-issue arose with respect to Parkfield and Long Valley, where the borehole networks enable us to detect/locate quakes much smaller than 1.0. The same is true at the Geysers where the 23-station Calpine network drives the detection threshold down. The problem is that the coda duration (Md) algorithm used in Earthworm (and AQMS) discards codas <7s because in the previous analog world these short codas would generally be noise glitches. So, M<1 quakes generally have indeterminate magnitudes. Still, even with a “zero” magnitude, the P.I.’s monitoring these areas what to see the smaller quakes on the recenteqs pages.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Courier New";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Courier New";color:#1F497D'>Now that the NCSN has complete metadata for all digital waveforms back to 1984, we can determine if the record is not clipped and, if so, compute synthetic Wood Anderson seismograms for all quakes – even those recorded by analog equipment. We can then calculate the peak amplitudes for use in determining ML for these small quakes. <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Courier New";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Courier New";color:#1F497D'>We’re in the discussion stages of how to do this. It will take a lot of computation and careful calibration to get the Ml scale correct for M<3 quakes where the traditional ML scale was developed.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Courier New";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Courier New";color:#1F497D'>-David <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Courier New";color:#1F497D'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> ehpweb-bounces@geohazards.usgs.gov [mailto:ehpweb-bounces@geohazards.usgs.gov] <b>On Behalf Of </b>Michael Blanpied<br><b>Sent:</b> Friday, December 03, 2010 12:12 PM<br><b>To:</b> Lisa A Wald<br><b>Cc:</b> Leith Bill; EHPweb<br><b>Subject:</b> Re: [EHPweb] NextGen EQMaps Beta<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal>Thanks, Lisa! Sorry to bother you about a resolved issue.<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>So the floor is now M=0? I assume that will satisfy folks. I actually have no idea whether the network locates earthquakes M<0!<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Mike<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><p class=MsoNormal>The omission of M<1 earthquakes was an error on our part. We fixed that one immediately. If you take a look at the Beta maps now, you'll see all the M<1 earthquakes on them already.<o:p></o:p></p></blockquote><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><p class=MsoNormal><o:p> </o:p></p></blockquote><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><p class=MsoNormal><a href="http://earthquake.usgs.gov/earthquakes/mapping/">http://earthquake.usgs.gov/earthquakes/mapping/</a><o:p></o:p></p></blockquote><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><p class=MsoNormal><o:p> </o:p></p></blockquote><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><p class=MsoNormal>- Lisa<o:p></o:p></p></blockquote><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><p class=MsoNormal>------<o:p></o:p></p></blockquote><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><p class=MsoNormal><o:p> </o:p></p></blockquote><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><p class=MsoNormal><o:p> </o:p></p></blockquote><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><p class=MsoNormal style='margin-bottom:12.0pt'><o:p> </o:p></p></blockquote><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><p class=MsoNormal><o:p> </o:p></p></blockquote><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><p class=MsoNormal>On Dec 3, 2010, at 12:45 PM, Michael Blanpied wrote:<o:p></o:p></p></blockquote><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><p class=MsoNormal><o:p> </o:p></p></blockquote><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><p class=MsoNormal>Lisa,<o:p></o:p></p></blockquote><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><p class=MsoNormal><o:p> </o:p></p></blockquote><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><p class=MsoNormal>Thanks very much for the feedback and summary! It's great to know that you're making progress on the new maps, and that you've found a suitable way around the Google impediments.<o:p></o:p></p></blockquote><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><p class=MsoNormal><o:p> </o:p></p></blockquote><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><p class=MsoNormal>One point that I don't see on your list is the question of M<1 earthquakes. Our colleagues with interests in central California and in volcanic areas are very keen to see the magnitude floor removed from the maps. This has been brought to my attention a couple of times now, so I'd appreciate hearing the status of that issue so that I'll know how to respond next time it comes up.<o:p></o:p></p></blockquote><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><p class=MsoNormal><o:p> </o:p></p></blockquote><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><p class=MsoNormal>Thanks again,<o:p></o:p></p></blockquote><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><p class=MsoNormal>Mike<o:p></o:p></p></blockquote><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><p class=MsoNormal><o:p> </o:p></p></blockquote><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><p class=MsoNormal>At 10:49 AM -0700 12/3/10, Lisa A Wald wrote:<br><br><o:p></o:p></p><p class=MsoNormal>Everyone-<o:p></o:p></p><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><p class=MsoNormal><o:p> </o:p></p></blockquote><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><p class=MsoNormal>Thank you for your feedback, comments, and suggestions about the Next Generation Earthquake Maps for the EHP website.<o:p></o:p></p></blockquote><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><p class=MsoNormal><o:p> </o:p></p></blockquote><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><p class=MsoNormal>The Web Team has compiled the various comments, weighted them according to how many times we received the same comment, and we are currently addressing all the comments starting with those with the highest priority.<o:p></o:p></p></blockquote><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><p class=MsoNormal><o:p> </o:p></p></blockquote><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><p class=MsoNormal>Because of Google licensing issues with our high web traffic to the EQ Maps, we are having to move to another client-side software, OpenLayers API. I think you'll agree that OpenLayers is every bit as good, if not better, than Google Maps (and it doesn't preclude us from using Google Maps API in the future if the licensing issue is resolved).<o:p></o:p></p></blockquote><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><p class=MsoNormal><o:p> </o:p></p></blockquote><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><p class=MsoNormal>These are some of the tasks we're working on to address your concerns before the Public Beta is launched in January:<o:p></o:p></p></blockquote><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><p class=MsoNormal><o:p> </o:p></p></blockquote><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><p class=MsoNormal>1. Remove clustering algorithm, or allow user to turn it on and off; add cluster symbol to map key.<o:p></o:p></p></blockquote><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><p class=MsoNormal>2. Add links to event pages from event table below map; turn off dbl-click on event symbol on map.<o:p></o:p></p></blockquote><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><p class=MsoNormal>3. Implement full-page-size map.<o:p></o:p></p></blockquote><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><p class=MsoNormal>4. Add magnitude to hover text.<o:p></o:p></p></blockquote><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><p class=MsoNormal>5. Change labeling from "Event" to "Earthquake".<o:p></o:p></p></blockquote><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><p class=MsoNormal>6. Add user guide for features that are not intuitively obvious.<o:p></o:p></p></blockquote><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><p class=MsoNormal>7. Use our own basemaps, cities, list, etc instead of the build-in data provided by Google Maps.<o:p></o:p></p></blockquote><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><p class=MsoNormal>8. Other small changes such as scale bar, lat/lon of mouse position.<o:p></o:p></p></blockquote><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><p class=MsoNormal><o:p> </o:p></p></blockquote><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><p class=MsoNormal>Additional features, such as faults with mouse-over info, volcano locations, caldera boundaries, etc. will be added in the future, potentially before the final public release. We'll have a mechanism in place to receive comments on the next beta version too.<o:p></o:p></p></blockquote><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><p class=MsoNormal><o:p> </o:p></p></blockquote><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><p class=MsoNormal>Thanks for helping to make this an outstanding product!<o:p></o:p></p></blockquote><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><p class=MsoNormal><span style='font-family:"Verdana","sans-serif"'>- </span>Lisa<span style='font-family:"Verdana","sans-serif"'><br><span style='color:#008500'>--------------------------<br>Lisa Wald, Geophysicist</span></span><o:p></o:p></p></blockquote><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><p class=MsoNormal><span style='font-family:"Verdana","sans-serif";color:#008500'>Web Team Manager/Project Manager<br>USGS Earthquake Hazards Program<br>Golden, CO<br>303-273-8543<br></span><a href="mailto:lisa@usgs.gov"><span style='font-family:"Verdana","sans-serif";color:#008500'>lisa@usgs.gov</span></a><o:p></o:p></p></blockquote><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><p class=MsoNormal>--------------------------<o:p></o:p></p></blockquote></blockquote><div><p class=MsoNormal><o:p> </o:p></p></div></div></body></html>