[EHPweb] FW: M<1 earthquakes

Wed Jun 2 21:17:47 UTC 2010

Jeremey,

I have moved, or have started the process for moving the rest of the  
sites(excluding eqhazmaps which you note is a redirect) off of  
ehzmenlo to another system. I am hoping to have them all moved by July.

Stan

On Jun 2, 2010, at 1:51 PM, Jeremy M Fee wrote:

> Hi Stan,
>
> I didn't know there was a planned turn off date for ehzmenlo.  It  
> is still running several vhosts (according to httpd.conf) including:
>
> 	ncweb-menlo.wr.usgs.gov
> 	ncsn.wr.usgs.gov
> 	sfbquakes-north.wr.usgs.gov
> 	eqhazmaps.wr.usgs.gov
> 	hotspringchem-master.wr.usgs.gov
> 	menlocampus.wr.usgs.gov
> 	gpsstationinfo.wr.usgs.gov
> 	sicarius.wr.usgs.gov
>
>
> I think we can absorb eqhazmaps.wr.usgs.gov into earthquake, since  
> it just redirects to earthquake, but it isn't clear at this time  
> whether or not the other sites can easily be turned off or moved.
>
>
> Jeremy
>
> On Jun 2, 2010, at 2:13 PM, Stan Silverman wrote:
>
>> Jeremy,
>>
>> Based on current requirements, I plan to keep the ncweb-north site  
>> going until the end of June. By that time we will also try to turn  
>> off the ehzmenlo machine because it has the same issues as ehznorth.
>>
>> Stan
>>
>> On Jun 1, 2010, at 2:38 PM, Jeremy M Fee wrote:
>>
>>> Hi David,
>>>
>>> Is it possible to use http://ncweb-menlo.wr.usgs.gov/ instead of  
>>> ncweb-north for this short term need?  We already planned to keep  
>>> ehzmenlo running because it serves other web sites besides quake.
>>>
>>> Part of the reason we merged quake was so we could shut down the  
>>> old, unpatched servers like ehznorth.
>>>
>>>
>>> Thanks,
>>>
>>> Jeremy
>>>
>>>
>>> On May 21, 2010, at 11:11 AM, David Oppenheimer wrote:
>>>
>>>> Hi Lisa,
>>>>
>>>> Thanks for explaining the problem. Since the Google Maps is a  
>>>> prototype app, we ask that the recenteqs on http://ncweb- 
>>>> north.wr.usgs.gov/, which is a public facing server, be kept  
>>>> running indefinitely until we have a satisfactory outcome of  
>>>> this issue.  Having said that, we’re interested in testing the  
>>>> Google Maps approach.
>>>>
>>>> -David
>>>>
>>>> -------------------------------------------------------
>>>> David Oppenheimer                   office:650.329.4792
>>>> U.S. Geological Survey              fax:   650.329.4732
>>>> 345 Middlefield Road.-MS 977    email: oppen at usgs.gov
>>>> Menlo Park, CA 94025
>>>>
>>>> From: ehpweb-bounces at geohazards.usgs.gov [mailto:ehpweb- 
>>>> bounces at geohazards.usgs.gov] On Behalf Of Lisa A Wald
>>>> Sent: Wednesday, May 19, 2010 11:55 AM
>>>> To: EHPweb; Dina Venezky
>>>> Subject: [EHPweb] M<1 earthquakes
>>>>
>>>> Earthquake Maps and Lists for M<1 events
>>>>
>>>> Background:
>>>> The EHP website has been listing and mapping all reent M1+  
>>>> earthquakes in the US.  The N. CA website has been listing and  
>>>> reporting all recent M0+ earthquakes.  When the Menlo website  
>>>> merged with the EHP website a couple of weeks ago, the maps and  
>>>> lists of M<1 earthquakes were no longer available.   
>>>> Subsequently, we learned that these smaller magnitude  
>>>> earthquakes are monitored in specific locations by the Volcano  
>>>> Hazards Program (VHP) and by the SAFOD group.  I'm also aware  
>>>> that some of the ANSS regional networks still have their own  
>>>> maps and lists on their websites because they, too, want to see  
>>>> all the smaller earthquakes.
>>>>
>>>> Critical goal:
>>>> To restore the access to the recent maps and lists of  
>>>> earthquakes M<1 for the VHP and SAFOD staff.  Being able to see  
>>>> the map and the list at the same time is desirable.  VHP needs  
>>>> the caldera boundaries on the map.
>>>>
>>>> Future goal:
>>>> To provide access to the recent M<1 earthquakes for the entire  
>>>> US and eliminate the necessity for the ANSS regional networks to  
>>>> run their own maps/lists system.
>>>>
>>>> Issues:
>>>> The first instinct is to remove the M=1 threshold on the current  
>>>> recenteqs system, but adding these on the EHP website doubles  
>>>> the number of earthquakes in the system.  This has several  
>>>> consequences:
>>>>
>>>> 1) The addition of M<1 earthquakes on the lists will cause the  
>>>> lists to be extremely long in some cases, making it difficult to  
>>>> see/find the larger events in the list.
>>>>
>>>> 2) Every hour all the recenteq lists and maps are re-run to  
>>>> refresh the time stamp and flush events that are older than 7  
>>>> days.  This is a linear operation with the list being updated  
>>>> first, then the maps being recreated, and then last any new  
>>>> events that have come into the system during this hourly process  
>>>> are added to the maps and lists.  This takes up to 5 minutes  
>>>> currently, and could take up to 10 minutes if we added the M<1  
>>>> events.  If a new event occurred right after this process  
>>>> started on the hour, it may be up to 10 minutes before it  
>>>> appeared on the EHP website.
>>>>
>>>> 3) The addition of M<1 earthquakes on the maps will obscure  
>>>> larger events underneath them in some cases, making it difficult  
>>>> to access the information on the larger event.
>>>>
>>>> Note: Since event pages are created one at a time, these can  
>>>> easily be created for ALL magnitude earthquakes, allowing access  
>>>> to all the products for these smaller events.
>>>>
>>>> Proposed Solution:
>>>> We already have an internal "proof of concept" Google map using  
>>>> the M1+ RSS feed on the web development server.  We can add an  
>>>> RSS feed of ALL magnitude earthquakes and plot these on the  
>>>> Google map.
>>>>
>>>> Tasks for completion:
>>>>
>>>> 1) Turn on RSS feed for ALL earthquakes.
>>>>
>>>> 2) Start creating event pages for ALL earthquakes.
>>>>
>>>> 3) Obtain data for caldera boundaries.
>>>>
>>>> 4) Modify Google map to use "clustering" ??? which will plot a  
>>>> marker with the number of earthquakes it is representing in  
>>>> locations where the earthquakes are close together.  As you zoom  
>>>> in, the individual earthquakes are individually plotted.  This  
>>>> will speed up the rendering of the Google map which is really  
>>>> slow when plotting ALL magnitude earthquakes in the US.
>>>>
>>>> 5) Modify list below the Google map so that events are linked to  
>>>> their event pages.
>>>>
>>>> 6) Deploy this on the master and backup servers for internal use.
>>>>
>>>> This is the direction we would like to go in for our future  
>>>> recent eq maps, so this would provide a convenient development  
>>>> and testing environment for that longer term goal.  We intend to  
>>>> have this available sometime next week.
>>>>
>>>> - Lisa
>>>> --------------------------
>>>> Lisa Wald, Geophysicist
>>>> Web Team Manager
>>>> USGS Earthquake Hazards Program
>>>> Golden, CO
>>>> 303-273-8543
>>>> lisa at usgs.gov
>>>> --------------------------
>>>>
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>>>
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>>
>