David Oppenheimer John Evans Bob Hutt Gray Jensen Jim Luetgert The Parkfield Experience 50 SM stations within 20km 80% were SMA-1 recorders Wave field aliased It will take ~70 years at this rate 3600 more stations needed to achieve Vision 2005 goal of 5500 stations San Fernando TriNet CISN & ANSS Number/Yr Project History 4-6/2006: Developed Specifications for an Accelerograph Appliance 8/8/2006: RFP announced Develop/deliver 3 prototypes Purchase as many additional units within $100K 9/26/2006: Award issued to GeoSig September 2006 36 accelerographs 7/6/2007: Prototypes delivered 9/7/2007: Round 1 of testing at ASL and Menlo Park 3/5/2008: Round 2 of testing at ASL and Menlo Park 4/22/2008: Prototypes meet specifications The NetQuakes Concept Volunteer hosts with wireless Internet solicited Technician installs device Bolt cradle, orient device, configure device, determine GPS coordinates USGS monitors SOH messages Hosts swap out bad units/batteries not technicians Research quality data without site visits, telemetry bills, permit hassles Specifications Serviceable by hosts Swap unit Swap battery Functionality Uploads earthquake triggers immediately in mSEED 1 week of ring Linux Accepts algorithms Contacts server periodically Uploads SOH in XML Downloads new config files forced triggers Unix scripts OS revisions Firmware revisions Communications Wireless (802.11b) with at least WEP security Ethernet Initiates connection to server Attempts to connect to alternate servers Secure data transmission Power 110 VAC 90dB Flat Hz Clipping recovery within 10s Digitizer >16bits minimum 200 sps (selectable preferred) Timing accurate to 20ms with NTP, GPS capable Clock drift 36-hour Sealed Lead Acid Battery Three 1000sps Burr-Brown (TI) ADCs Threaded rods GPSPower Ethernet Wireless Console Ethernet Padlock hole Securing screws Clipping Tests Tilt tests Seconds M /01/22 20:46:58 recorded at CI.GSA (40km) CI NQ HNZ 0.34 cm/s/s HNE 0.42 cm/s/s HNN 0.41 cm/s/s M4.3 Software Status: SeisNetWatch Server Functional Software Status: Registration Page Functional Project Status 3 Servers operating in Menlo Park, Golden, and Caltech Peak ground motions fed into CISN system Waveform images created dynamically and available on USGS web SOH fed into SNW 61 units delivered; 59 on order 2 units sent to 6 regional seismic networks (HV, UW, CI, UU, NM, LD) ~40 to be deployed in SF Bay region 33 volunteers in first, private solicitation 5-year/$3M contract in place Is NetQuakes Suitable for RAMP? Advantages o Easy to install; could be used in buildings o 3-g full-scale o Relatively inexpensive o RT or delayed integration via Internet o Involves citizens (and provides security) Disadvantages o Acceleration only o Events only, but can be remotely triggered if connected