DPC S5 - Test site Alto Tiberina fault
WP 1.3
Velocity and strain rate fields
across the fault from integration
of regional GPS networks
Resp. Nicola D’Agostino
E. D’Anastasio*, F. Criscuoli*, A. Avallone*, A. Memmolo*, F. Minichiello*, G. De
Luca*, F. Migliari*, L. Mondiali*, F. Radicioni**, A. Stoppini**, G. Fastellini**
*
Istituto Nazionale di Geofisica e Vulcanologia, Centro Nazionale Terremoti
** Dipartimento Ingegneria Civile ed Ambientale, Perugia (Labtopo)
Roma, 24 marzo 2010
Objectives
• integrate GPS data from regional GPS
networks
• homogeneous velocity field in terms of
data processing and reference frame
alignment
• distribution of the tectonic strain rate and
the rate of strain accumulation of known
active faults
Velocity field – end of 2008
After D’Agostino et al., Tectonophysics, 2009
MURB
optimal site
Deep reinforced concrete pillar
(5 m)
MVAL
Optimal site
Wyatt/Agnew short drilled
braced
MURB Vs. MVAL time series
Antenna
change
due to
lightning
Velocity field – 2004
CGPS with age > 2.5 yrs
Velocity field – today
CGPS with age > 2.5 yrs
Strain
rate from
GPS
(to be upgraded
with increasing
number of
CGPS)
After D’Agostino et al., Tectonophysics, 2009
Range of geodetic Vs. seismic moment
sum of
geodetic
strain rates
for different
seismogenic
thickness
Mw > 5.5 last
720 years
After D’Agostino et al., Tectonophysics, 2009
Zoom on ATF zone
5 new installed
CGPS stations
•
4 new RING sites > 2.5
years old for ATF transect
•
ATFO already active
(since July 2009)
•
4: monument is done, will
start logging today
•
+ 1 (or 2) to be done
For the end of the project,
we will provide:
- Updated Time series of the ATF sites
- Updated GPS velocity field of the region in
both ITRF05 and Eurasia reference frames
- Updated map of strain rates
- Updated geodetic moment rate at the ATF
sites