From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mtv-iport-4.cisco.com (mtv-iport-4.cisco.com [173.36.130.15]) (using TLSv1 with cipher RC4-SHA (128/128 bits)) (Client CN "mtv-iport-4.cisco.com", Issuer "Cisco SSCA2" (verified OK)) by huchra.bufferbloat.net (Postfix) with ESMTPS id EEDE421F0B3 for ; Sat, 26 May 2012 23:42:59 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=cisco.com; i=fred@cisco.com; l=3357; q=dns/txt; s=iport; t=1338100980; x=1339310580; h=subject:mime-version:from:in-reply-to:date:cc:message-id: references:to:content-transfer-encoding; bh=JGrwuSY0wj1S+q+qdKGDCEDpmMGBMICVmkACqISQP0M=; b=GC3i2KWcCJaUGtP92inZ2i9YtvqJwUFlFYHUdDbRabluClMgSyTRHHqW /JL2Mb99l/3HJyR6teau5K9XKUa4okPWWJf6W+iC4RXJgzA+5XHBgBrfa DRDuV3z0UEp02eYG9VnWqo3RoLc/E4qT5dZ8IuIYQPV+L4+zCUPBRoWKw s=; X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: Av8EANPMwU+rRDoI/2dsb2JhbABFs3+BGIEHghcBAQEDAQEBAQ8BJzQLEAsOOCcBLwYTIodkBAyYSp50iwOEX2ADiD+KM4IlgQ+EQIg9gWWDAA X-IronPort-AV: E=Sophos;i="4.75,665,1330905600"; d="scan'208";a="46477640" Received: from mtv-core-3.cisco.com ([171.68.58.8]) by mtv-iport-4.cisco.com with ESMTP; 27 May 2012 06:42:50 +0000 Received: from stealth-10-32-244-219.cisco.com (stealth-10-32-244-219.cisco.com [10.32.244.219]) by mtv-core-3.cisco.com (8.14.5/8.14.5) with ESMTP id q4R6gJ8n008418; Sun, 27 May 2012 06:42:49 GMT Received: from [127.0.0.1] by stealth-10-32-244-219.cisco.com (PGP Universal service); Sat, 26 May 2012 23:42:49 -0700 X-PGP-Universal: processed; by stealth-10-32-244-219.cisco.com on Sat, 26 May 2012 23:42:49 -0700 Mime-Version: 1.0 (Apple Message framework v1084) From: Fred Baker In-Reply-To: <20120527032502.EBB73800037@ip-64-139-1-69.sjc.megapath.net> Date: Sat, 26 May 2012 23:42:49 -0700 Message-Id: <3B65E5C5-4E4D-482F-88CC-14D4F0EB5015@cisco.com> References: <20120527032502.EBB73800037@ip-64-139-1-69.sjc.megapath.net> To: Hal Murray X-Mailer: Apple Mail (2.1084) Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: quoted-printable Cc: dews@lists.bufferbloat.net Subject: Re: [Dews] USGS: ShakeAlert X-BeenThere: dews@lists.bufferbloat.net X-Mailman-Version: 2.1.13 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 27 May 2012 06:43:00 -0000 I'm very very confused. The discussion on the bufferbloat list was about = how to get a message from a system containing a cheap accelerometer - a = CPE Router or a set-top box - to someone that wanted to receive them = from zillions of sources. It seems to be morphing into a discussion of = the Common Alerting Protocol = (http://en.wikipedia.org/wiki/Common_Alerting_Protocol) or something = like it to distribute alerts. Please pick one. If it's the CAP discussion, there is a lot of work = going on and we don't need another place to comment on it; drop me off. On May 26, 2012, at 8:25 PM, Hal Murray wrote: >=20 > In Apr, 2012, the monthly public lecture at the USGS Menlo Park campus=20= > described their work in this area: >=20 > ShakeAlert! > --building an earthquake early warning system for California > by Doug Given, USGS Earthquake Early Warning Coordinator > * Millions of Japanese citizens received advance warning of the 2011 > magnitude 9.0 Tohoku earthquake -- can such a system be built for use = in > California? > * University researchers and government agencies are working = together to > create an Earthquake Early Warning system in California to reduce = earthquake > losses > * April is Earthquake Awareness Month in California -- how could you = and > your family best prepare for severe ground shaking using 30 seconds of > advance warning? >=20 > The video of the talk is online. It's an hour and a half. > http://online.wr.usgs.gov/calendar/2012/apr12.html >=20 > It's pretty good. I think anybody interested in this topic should = watch it. > If nothing else, it will give us a common reference. >=20 >=20 > Numbers and such from my memory: >=20 > P waves travel at 3 miles/second. S waves (the destructive ones) = travel at=20 > 2 miles/second. >=20 > It takes about 10 seconds to verify that a quake exists and estimate = how > big it is. >=20 > They think they can get a 20-30 second warning. That's for a big = enough > quake, and far enough away but not too far. If it isn't big, nobody = cares. > If it's too far away nobody cares. If it's too close, you don't get = enough > warning time to be useful. Quakes on the San Andreas Fault near Los = Angeles > are likely to fit. (The USGS people doing the work are located in = Pasadena.) >=20 > Half (or more) of the work is making contact with the people who want = to > know that a quake is coming. BART wants to stop their trains. (BART = trains=20 > can carry 1000 people.A serious wreck would overload the emergency = response=20 > system even without any other earthquake damage.) >=20 > He had lots of info from Japan. They have a lot more/denser sensors = than we=20 > do. >=20 > The USGS is looking for $50-100 million over 5 years to install more = sensors=20 > and $5-10 million/year for operations. >=20 > -------- >=20 > The Moore foundation gave $6 million to CalTech, Berkeley, and Univ of > Washington for work in this area. > http://www.usgs.gov/newsroom/article_pf.asp?ID=3D3041 > They are cooperating with the USGS. >=20 >=20 > --=20 > These are my opinions. I hate spam. >=20 >=20 >=20 > _______________________________________________ > Dews mailing list > Dews@lists.bufferbloat.net > https://lists.bufferbloat.net/listinfo/dews