U.S. Department of the Interior U.S. Geological Survey Volcano Monitoring Plans for the Northern Mariana Islands USGS & CNMI Emergency Management Office Presented by Tom Murray, Project Chief, Northern Mariana Islands Volcano Monitoring and Hazards Mitigation Project US Geological Survey, Anchorage Alaska

The USGS and the Emergency Management Office (EMO) have been working together on NMI volcanoes since 1981  Domestic volcanoes are a USGS responsibility  Under the Stafford Act (Public Law ), the USGS has the responsibility to issue timely warnings of potential geologic disasters to the affected populace and civil authorities.  The interest has been long-term, but more in response mode than a long-term consistent effort.  Ash hazard to aviation, both local and trans-Pacific  Downwind impacts to Saipan, Guam  Volcanic hazard to nearby population, fishing  Potential tsunami hazard (albeit small)

Good monitoring is good science. Good science is good monitoring.  Research is still fundamental to a successful observatory  Foundation of any successful eruption response or hazard assessment is a solid understanding of the volcanic processes in play, including deep in the subduction zone.  Major difference is that monitoring has a real time factor  Looking for changes through time  Timeliness in response to unrest  Timeliness in analysis

I am hoping to find opportunities for scientific and logistical collaboration that aids both USGS and MARGINS in achieving their goals.

Current Instrumentation all data radio-telemetered to CNMI Emergency Management Office in Saipan  Anatahan  1 short-period, 3-component analog station  2 short-period vertical analog stations with pressure sensors  Sarigan  1 short-period, 3-component analog station  Saipan  1 Broadband (MARGINS)  1 short-period 3-component analog station  SO2 sensor  Earthworm data acquisition system  DSL to internet

The following is only the plan  Funding not in place  Must go slow  Everything that follows is contingent on the availability of funding

Real-time geophysical monitoring networks for highest threat volcanoes Agrigan, Alamagan, Anatahan, Pagan, Asuncion, Farallon de Pajaros, Guguan, Sarigan Modern digital seismic instrumentation Deformation monitoring (tiltmeters, GPS, tide gauges, InSAR) Up-to-date hazard assessments As outlined in the National Volcano Early Warning System (NVEWS) document USGS Open-File Report What is needed: A Northern Mariana Islands Volcano Monitoring System

Future plans - Big Picture  Install telemetered geophysical monitoring networks on  Farallon de Pajaros (4 short-period)  Maug (4 short-period)  Asuncion (3 short-period, 1 broadband, 1 GPS)  Agrigan (4 short-period)  Pagan (4 short-period, 1 broadband, 1 GPS)  Alamagan (3 short-period, 1 broadband, 1 GPS)  Guguan (4 short-period)  Sarigan (4 short-period)  Anatahan (4 short-period)  Saipan (1 broadband, 1 GPS)

Communications  C-BAND VSAT uplinks  Asuncion  Pagan  Alamagan  C-BAND VSAT downlink  EMO in Saipan  DSL to general internet  EMO  General internet to AVO, CVO, HVO

Add it all up  34 Short period  4 Broadband  4 CGPS Alamagan Seismic network Satellite uplink and GPS Agrigan

Data availability  Seismic data  IRIS facility in Seattle  Winston waver servers  Annual catalog  GPS data  UNAVCO

Current plan for  2008  Beef up receive facility at EMO in Saipan  Install satellite down-link at EMO  Install satellite uplink also at EMO for testing  Possibly finish field geologic mapping at Pagan  2009  Move uplink to Pagan and install network there  4 short-period, 1 broadband, 1 GPS

Again - this has been only the plan  Funding not in place  Must go slow  Everything is contingent on the availability of funding