July 6, 2010
HPWREN partnership with TDVnet facilitates deployment of UC Santa
Barbara seismic sensors on Native American land
By Jamison Steidl, Institute for Crustal Studies, UC
UCSB and the Southern California Earthquake Center (SCEC) has
deployed a seismological station at the Tribal Digital Village
Network (TDVnet) Mesa Grande backbone site, to gain better coverage
in the area, should the Elsinore Fault be the next to go in the
Northwest extension of the M7.2 El Mayor event and its aftershocks.
The seismic station records both weak and strong shaking and the
data is transmitted in real-time back to San Diego from the TDVnet
site via the HPWREN network. The data is then available to the
California Integrated Seismic Network (CISN) for assisting the
network in determining earthquake locations and magnitudes from the
very smallest earthquakes, less than magnitude 1.0, all the way to
the largest damaging events.
Michael Peralta (TDVnet) and Jamison Steidl discussing the seismic
sensor installation at the deployment site.
The strong motion observations from larger earthquakes are
important for earthquake engineering applications, like generating
shake maps for an emergency response, and for improving our ability
to design the built environment to withstand shaking from earthquakes.
Having both the weak motion sensor and strong motion sensor allows
the Mesa Grande seismic station to be used for multiple earthquake
The Mesa Grande location was selected as it is about midway
between existing stations in the Palomar Mountain and Julian areas,
and has good network connectivity and electric power stability.
Both seismic sensors, prior to their installation.
The data acquisition equipment consists of a Q330 datalogger and
Marmot field processor, both 1W of power. Adding the strong motion
sensor requires still below 3W of continuous power draw and everything
runs off 12 Volts.
Completed installation, with the strong motion sensor being below the
wooden panel, and bolted into the concrete.
UCSB and SCEC are very grateful to the TDVnet and HPWREN networks
for providing the communications and power infrastructure to enable
us to quickly bring this site online and stream the data in real-time.
Screen shot of a Magnitude 0.8 earthquake
that was recorded by the Mesa Grande station on June 30, 2010.