NETWORK REPORT SRI LANKA Geological Survey & Mines Bureau Sri Lanka

MAJOR PLATE BOUNDARIES

Precambrian Basement Low seismicity No active faults

Earthquake & Tsunami threat Plate boundaries in the East and West of Sri Lanka Increased seismicity in the South, near equator Micro-Seismic activity within the country

EARTHQUAKES NEAR THE ISLAND

PALK IRIS/IDA station

Sensors Teledyne Geotech KS Three component broadband system Long period – very long period channels 20 sps, 1sps and 0.1 sps Grulap CMG-3T Three component short period 40 sps Kinemetrics FBA-23 Three component force balance accelerometer 1 sps continuous mode and 100 sps Data Acquisition System - IDA MK7

KS – Broadband Seismometer The KS is emplaced in a cased borehole drilled into rock of migmitic rock at a depth of 100 meters. The CMG-3T is set in a shallow borehole approximately 0.5 meter from the KS borehole. Configuration – Three Component Sensitivity V/(m Sec -2 )

University Seismic Network

Proposed GEOFON Broadband Stations Two broadband stations link to the Indonesian Tsunami Early Warning System Site survey completed MoU in progress (GFZ & GSMB) Establish end of 2007

Proposed GEOFON Stations

Future Plans Establish two new GEOFON stations Fix the University Network problems Establish National Data Centre

PALK IRIS/IDA Station University Seismic Network Proposed GEOFON Stations Kandy Colombo National Data Centre

Thank You