1 / 11

SCEC - EarthScope (PBO) a confluence of interests

SCEC - EarthScope (PBO) a confluence of interests. Ken Hudnut U. S. Geological Survey, Pasadena. How can EarthScope (& ANSS) help to further SCEC science goals?. Review what we have (SCEC CMM3 & SCIGN) Examine the EarthScope & SCEC proposals

kalani
Télécharger la présentation

SCEC - EarthScope (PBO) a confluence of interests

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. SCEC - EarthScope (PBO)a confluence of interests Ken Hudnut U. S. Geological Survey, Pasadena

  2. How can EarthScope (& ANSS) help to further SCEC science goals? • Review what we have (SCEC CMM3 & SCIGN) • Examine the EarthScope & SCEC proposals • PBO 2 workshop mini-proposal process defined configuration - backbone & clusters • PBO committees to select sites - to go from general to specific & meet science goals • What if something else would be ‘better’? • Any suggested changes should go to PBO SC • Identify opportunities for synergy • Missions & funding levels of agencies and NGO’s • Joint development of data products

  3. SCIGN Data Products* • 1st Year • Combined time • series (1996-2002) • 3rd Year • Real-time earth- • quake response • 5th Year • Resolve rates on • primary LA basin • faults (and others) *NASA grant - Webb, PI

  4. SCEC Tectonic Geodesy • 1st Year • Complete and • distribute CMM3 • 3rd Year • Integrate InSAR • with GPS for • vertical defor- • mation rates • 5th Year • Resolve rate dis- • crepancies • between geology • and geodesy

  5. Understanding transient deformation • Temporal & spatial variations do occur: • Clustering (e.g., Basin & Range, ECSZ, Asia) • Discrepant geological and geodetic rates • Sequences involving fault interaction (e.g., Joshua Tree - Landers - Big Bear - Hector Mine; Anatolian system, etc.) • PBO and SCEC have nearly identical stated scientific goals on this range of related topics Courtesy Anke Friedrich

  6. Understanding fault interaction 1857 San Andreas • Emerging view of large events as a composite of sub-events or asperities • Dynamic triggering • Static triggering • Important to study analogous events • Cascading rupture - is there order in the chaos? • San Andreas fault - continental transform with excellent on-land exposure of ‘creeping to locked’ transition zones, long simple sections, and ample fault zone complexity Bayarsayhan et al., 1996 Kurushin et al., 1998 1957 Gobi-Altay

  7. San Andreas fault • 35 mm/yr slip rate; • >70% of plate motion • 1685, 1812, 1857 eq’s • Big Bend compression • 1971 Sylmar (M 6.7) • 1994 Northridge (M 6.7) • SoCal is now heavily ‘wired’ - need more? • 150+ BB CISN stations • 250+ SCIGN stations • Catalog; SCEC CMM3 • ‘Natural laboratory’ • Likely source of most future ‘Big Ones’

  8. 400 station transportable array “big foot” • ~2400 instrument flexible array USArray • 4-km-deep scientific drilling project into the San Andreas fault zone near Parkfield SAFOD • 875 permanent GPS stations • 175 borehole strainmeters/seismometers • 100 campaign (portable) GPS systems • 5 laser strainmeters • Data and data products PBO What is EarthScope? Fully open data policy

  9. What is PBO? • Five year build out phase • Five year O&M phase • Total 10-year operational commitment • Six regional offices in Alaska, Pacific NW, Basin & Range, Rocky Mtns, Southern and Northern California • Each region has dedicated resources for recon, permitting, installation, maintenance, and data • Nominal data set – 30 sec data file downloaded daily • Potential data sets • 1 sec real time • 5 Hz on-demand • Two precise processing centers • Two archive/distribution centers

  10. 125 SCIGN stations proposed for support under NSF existing networks proposal (PBO relies on continued existence of SCIGN & diverse matching funds) • NSF funded ‘existing arrays’ proposal fully for next 1.5 years - plan & carry out a transition to PBO operations and maintenance by the end of 5 yrs. • ~170 new continuous GPS stations; SAF, ECSZ, transition zones (along-strike and with depth) • ~64 borehole strainmeters (yellow); 5 long-base laser strainmeters (Salton Trough ECSZ & PKF vicinities) PBO and SCIGN

  11. For discussion • CISN, ANSS, EarthScope, and PBO do not optimally address questions in earthquake source physics (e.g., SCEC FARM workshop topic on co-seismic phenomena); how can plans be modified to help rectify this? Are we too late? • How can we measure Dc? Stress heterogeneity? • Heaton slip pulses? Need 3D particle motions close to fault (e.g., the San Andreas fault in the Carrizo Plain and Coachella Valley in SoCal - large events ~likely) • Need high resolution deformation field for co-seismics to map slip distributions - without InSAR EarthScope is deficient; what else can be done? (Geo-EarthScope to provide high-res imagery) • Fall AGU 2003 & SSA 2004 (Palm Springs)

More Related