Proposal

to site a seismic stationon

Diego Garcia

Peter Davis

Project IDA

Scripps Institution of Oceanography

University of California, San Diego

Project IDA’s Goals:

• to develop high quality seismic data acquisition equipment

• to deploy systems globally at 2000 km spacing

Project IDA Funding

NSF

IRIS AFOSRGreen

Foundation

USGSUCSDIDA

Why select Diego Garcia?

• geographic position

IRIS/IDA Seismic Network

IDA British sites:

• ESK - Eskdalemuir, Scotland; British Geological Survey

• ASCN - Ascension Island; British Broadcasting

• EFI - East Falkland Island; Falklands Landholdings

• HOPE - South Georgia Islands; British Antarctic Survey

• SHEL - Island of St Helena; Government of St Helena

IRIS Global Seismic Network

Why select Diego Garcia?

• geographic position

• seismic activity in region

How are the data used?

• seismological studies

How are the data used?

• seismological studies

• test ban treaty monitoring

How are the data used?

• Seismological studies

• test ban treaty monitoring

• tsunami warning

What equipment is needed?

• seismometers

• associated electronics

• telecommunications devices

• power (if necessary)

What site characteristics are necessary?

• removed from cultural noise

• prefer leeward side

• far from coast and breaking reefs

• access to power, communications

What infrastructure is required?

• seismographic vault

What infrastructure is required?

• seismographic vault

• power– 0.5 kW exclusive of air conditioning

– 2.0 kW to climate control recording room

What infrastructure is required?

• seismographic vault

• power

• communications– TCP/IP via a serial circuit or LAN port

– station produces 2 kbs continuously

What does installation involve?

• Personnel– one visit by IDA administrator lasting < 7 days

– one visit by two IDA field engineers lasting 7-14 days

What does installation involve?

• Personnel

• Shipping:– weight of equipment 1400-1600 lbs

– usually shipped by air freight

What ongoing maintenance is required?

• one hour/week for routine operations

• 20 hrs/year non-routine maintenance

• site visits by IDA engineers < 0.5/yr