Getting to Know UNAVCO The Plate Boundary Observatory

Getting to Know UNAVCO & The Plate Boundary Observatory Shelley Olds, UNAVCO

About UNAVCO • • NSF and NASA funded Non-profit Consortium Membership-governed • Facilitates geoscience research and education using geodesy. • Pools resources & instruments – free data togetherthe use of UNAVCO data and products by a Broaden wide audience of educational and research users 2

Consortium Members

About Plate Boundary Observatory • Continent-scale network • GPS, borehole, and laser strainmeters • Focus: • Extended plate boundary • Extending into the continental interior • Operated by UNAVCO 4

PBO Instruments GPS: 1100 Continuous 5 Laser Strainmeters 74 Borehole Strainmeters and 78 Borehole Seismometers 26 Shallow Borehole Tiltmeters 5

Earth. Scope PBO GPS Network

Earth. Scope PBO GPS stations & workshop participant locations

Anatomy of a High-precision Permanent GPS Station GPS antenna inside of dome Monument solidly attached into the ground with braces. If the ground moves, the station moves. Solar panel for power Equipment enclosure • GPS receiver • Power/batteries • Communications/ radio/ modem • Data storage/ memory 8

Introduction: GPS Basics • Three satellite signals are needed to locate the receiver in 3 D space. • The fourth satellite is used for time accuracy. • Position can be calculated within a sub -centimeter. • Needs ground control and time quality

With one GPS satellite, the GPS receiver could be anywhere on the edge of the sphere. With two GPS satellites, the GPS receiver could be on the circle where spheres intersect. With three GPS satellites, the GPS receiver could be two places where the spheres intersect. With four GPS satellites, the spheres intersection in one place.

Learning Materials • • • Tutorials & How to’s Lessons Student worksheets Animations How to download data Based on time series inversion algorithms of Lundgren et al. (J. Geophys. Res. , 2001) and Berardino et al. (IEEE, 2002).

Exhibits

Find & Use Data • GPS, Li. DAR, In. SAR, strain, tilt … • Data/Data Products ØTime Series Plots ØImages ØVelocity Vectors ØVisualizations ØData formats § Raw § Processed

Explore & Compare Data GPS Velocities in UNAVCO Velocity Viewer using Google Maps http: //geon. unavco. org/unavco/GPSVelocity. Viewer. php GEON Li. DAR image in Google Maps http: //www. opentopography. org/index. php

Human scale views of data 25 mm/yr Data Source: UNAVCO Plate Boundary Observatory: North American Reference Frame UNAVCO GPS Velocity Viewer: 15 http: //facility. unavco. org/data/maps/GPSVelocity. Viewer. html

UNAVCO & PBO supported science In Northeastern United States • • • Plate movement Earthquakes Volcanoes Glacial movements and isostatic adjustment Hydrologic Atmospheric 16