Mike StickneyMontana Bureau of Mines and Geology

Earthquake Studies Office

Montana Regional Seismograph Network

ANSS IMW RAC21 August 2006

Montana Regional Seismograph Network

• 34 MBMG telemetered analog stations

• 1 MBMG strong-motion + SPZ channel

• 47 stations from 9 other networks

• Total: 82 stations/167 channels recorded in real time

82 stations recorded in real-time with Montana earthworm system

897 analysist-reviewed earthquakes from 1 January – 26 June 2006

Northern Intermountain Seismic Belt2006 seismicity

Seismograph station (black triangles) coverageof the Dillon earthquake sequence

Dillon

5 km

Recent Accomplishments

• QDDS running for automatic solutions

• improved automatic coda magnitudes

• ML from broadband records

• digital recording Butte W-A seismograph

• new velocity model and station delays

• new and improved web site

Short Comings

• No backup coverage during absences in a one-person office

• Badly behind on routine event analysis~500 events in August 2005

~200 events June 26, 2006 to present

• ~ 1 year behind on digital ML analysis

• Need to more efficiently analyze network data• Research on network data is sacrificed for the

sake of routine analysis and maintenance

Other Issues

• Incorporating USArray data into regional network operation

• Integrate USGS strong motion instruments into regional network