## University of Washington

Date: June 2, 1998

### Location, Contact, and Address:

Pacific Northwest Seismograph Network recording at Geophysics Program of the University of Washington

Steve Malone (steve@geophys.washington.edu) 206-685-3811

Box 351650, Univ. of Washington, Seattle, WA

### Network Characteristics:

~130 Analog stations, 12 broad-band, 7 strong-motion covering Washington & western Oregon

Analog data are digitized by an Analyix S-Bus A/D on a SUN Sparc-5 computer

1- Reftek continuous telemetry & 4 dial-up Reftek data-loggers

7- Terra Tech IDS-24 continuous telemetry,(using Reftek data format)

4- channels of waveform data imported from Northern California Network.

###

Standard EarthWorm Modules in current Use:

`EARTHWORM` code (v3.1) running on an SUN Ultra-1-170 under Solaris-2.6 getting its waveform data from a SUNWORM system runing on a SPARC-5. There is a block diagram showing all components of our current system:

- pick_ew -Pick data in trace_buf ring
- binder -Carl's associator
- eqproc, eqbuf, eqcoda, eqverify, eqtee -filter, quality check, and output pick associations-
- hypomgr, hypoinv -manage and produce standard USGS hypocenter locations
- import_generic - Used to import four waveform channels from Northern California in realtime.
- export_scn, export_generic - Used to export waveforms and traces to the Alaska - Pacific Tsunami Warning Center.
- wave_serverV -wave server with 18 hour for ~120 channels and 3 day buffer for the other ~80 channels
- startstop, copystatus, diskmgr, statmgr (control and monitor)

### Associated programs/modules already developed or adapted here:

- sun_demux -Retrieves digitized analog multiplexed data by IP socket from SPARC-5 machine running SUNWORM software, and demultiplexes it into a wave_ring for `EARTHWORM` use.
- uw_report, earth_proc, spong, dopage-produce UW style pickfiles, shell script to control hypocenter determination, and notify via e-mail and pager.
- Ref2ew - Adapted code from Reno/Alaska to read Reftek packets coming over leased-line modems from Terra Tech IDS-24 data loggers for insertion of data into wave_ring. This routine reads both from serial-I/O on a Central-Data 8-channel serial-SCSI box and also from a TCP/IP socket from an other computer receiving telemetered Reftek data coming from a Reftek RT-112 unit or a two-port terminal server connected to the serial output of a Terra-IDS box.
- Earth2uw - Uses `EARTHWORM` wave-server client library to request data from a wave_serverIV and create a UW2 event trace data file for manual processing using UW analysis tools such as xped.
- Carl_trig - We modified and tested a trigger system originally coded by Brian Moon of Battelle Northwest Labs to run the original C. Johnson (1979) LTA/STA with subnet coincidence on `EARTHWORM`. There are two programs, one to generate individual station triggers which may be exchanged with over the network with other `EARTHWORM` systems, and a subnet logic part which generates master event triggers which are written to a transport ring or optionally generates a UW-pickfile for use by earth2uw for waveorm extraction.
- Earth2sac - Similar to earth2uw above but writes SAC output files.

### Development Plans:

- Dial2ew - Modify our current Reftek dial-up system (SPYDER based) to take retrieved data and insert that into wave_rings (async type input). Nothing yet done past design concept.
- ORB server integration and evaluation - We have installed the JSP/Datascope ORB software and are evaluating its integration with our `EARTHWORM`

### Our Additional Needs:

- Keep the documentation coming and up to date.
- VSAT to `EARTHWORM` wave_ring for NSN data
- Easy data exchange with neighboring networks to the north and east British Columbia, Idaho and Montana)

Return to main `EARTHWORM` or Sites pages.