Descr: Installation of continuous GPS network, borehole and surface seismic observatories above the subducting plate boundary in Costa Rica to study slow slip events and associated nonvolcanic tremor. I have already installed 6 seismic stations using my own equipment but my Reftek DASs and broadband sensors (which are now 10 years old) are failing faster than we can maintain them and this is threatening the success of this project. This request is to keep 6 seismic stations running on the Nicoya Peninsula during the duration of this project. My preference would be to operate 6 broadband stations with the newest equipment, but at this point I'ld be very happy to be able to operate stations with the older Refteks and L22 sensors
