Draft (prepared by Yehuda Bock, Glen Mattioli and Tim Melbourne for review by WG) Summary READI Working Group Meeting, December 11, 2013 (4:00-6:00 PM), San Francisco

Participants: Attila Komjathy (JPL), Brendan Crowell (U. Washington), Craig Dobson (NASA), Diego Melgar (SIO), Frank Webb (JPL), Freddy Blume (UNAVCO), Geoff Blewitt (U. Nevada Reno), Glen Mattioli (UNAVCO), Ingrid Johanssen (UC Berkeley), Jennifer Haase (SIO), Jessica Murray (USGS-Menlo Park), Ken Hudnut (USGS-Pasadena), Mike Jackson (Trimble), Paul Bodin (U. Washington), Paul Passmore (RefTek/Trimble), Tim Melbourne (Central Washington U.), Tony Sung (JPL), Walter Szeliga (Central Washington U.), Yehuda Bock (SIO), Yuval Reuveni (SIO), Yu-Ming (Oscar) Yang (JPL)

Administrative help: Maria Turingan (SIO), Jaime Magliocca (UNAVCO)

Agenda 4:00 Program Manager Introduction (Craig Dobson, NASA) 4:10 SIO Overview (Yehuda Bock) 4:20 UC Berkeley Overview (Ingrid Johanssen) 4:30 CWU Overview + GPS Cockpit Demo (Tim Melbourne) 4:50 Time Series Comparisons (Yehuda) – did not get to this 5:00 Discussion & Future Plans (All) 6:00 Adjourn

The meeting opened with Craig Dobson from NASA Headquarters describing NASA’s interest and vision for a collaborative prototype earthquake and early warning system for the Western U.S. as a first step towards a CircumPacific effort. Yehuda Bock presented a few slides introducing READI and working group activities, the roles of data providers and data users, the ongoing intercomparisons between the independent PPP analysis efforts at CWU and SIO, and the focus on two station clusters along the southern San Andreas fault system and Cascadia. Presentations by Yehuda Bock, Ingrid Johanssen and Tim Melbourne described efforts at their respective institutions. We discussed the addition of a Bay Area (Hayward fault) cluster using UC Berkeley/USGS and PBO stations. The clusters would then cover the three areas of highest seismic risk in the Western U.S. Melbourne demonstrated the GPS Cockpit software developed at CWU. Melbourne’s presentation generated a discussion on tsunami warning with Tony Sung providing insights from his research and Diego Melgar describing tsunami modeling of the 2011 Japan event using on-shore seismogeodetic data, near-shore buoys and ocean-bottom pressure sensors. The slides from the three presentations will be posted on the READI Web page (http://sopac.ucsd.edu/projects/realtime/READI). A broad discussion ensued covering a variety of topics, including (not a comprehensive list):

(1) Continued funding for real-time networks in the Western U.S. (2) Broadening the applications of the current network and its user base

(3) Priorities for further expansion of real-time networks brought up by Glen Mattioli for PBO planning purposes in a lean funding environment (upgrade more PBO stations to real time; more focused distribution of stations in the event that the number of stations needs to be reduced; increase the number of GNSS stations; increase the number of seismogeodetic upgrades (GPS + accelerometer) as well as stations with met (pressure and temperature sensors). There was not enough time to achieve a consensus on the order of priorities. These are important issues and the WG was asked by Glen Mattioli to provide recommendations to PBO. Attila Komatjy ended the meeting with an overview of JPL’s program in ionospheric monitoring for natural hazards mitigation and gave examples of tsunami and meteorite warnings in light of the 2011 Tohoku-oki earthquake and tsunami and results from the 2013 Chelyabinsk meteor in Russia.