Footprint of Deformation Sensor Arrays
The geodetic network at Axial has doubled in the past five years from 5 to 10 permanent benchmarks for campaign pressure measurements, and the number of Bottom Pressure Recorders (BPRs) has increased from 2 to 5 (including the 2 new two BPR/tilt instruments on the cable). This expanded network should provide much better constraints to our modeling efforts than we have had in the past. Furthermore, building on efforts from MBARI, this summer we plan to collect repeat high resolution AUV bathymetry to extend the geodetic coverage to the entire caldera and beyond. Previously we have been limited in the scope to the southern half of the caldera, and have collected no deformation data outside of the caldera. Extending this coverage is critical in order to improve models of the magmatic system at Axial Seamount. The planned work represents a significant step forward, however, the repeat bathymetry results will have uncertainties an order of magnitude greater than campaign surveys. Therefore it is important to implement ways to tie the bathymetry to higher precision measurements, such as from an expanded network of benchmarks for campaign measurements.