The following information obtained from UNAVCO's online DOI system:
(https://www.unavco.org/data/doi/search/search.html)

RiftVolc GPS Network - ASRG-Southern Rim P.S.
Start: 24-Mar-2013
End: 25-Sep-2016
Biggs, Juliet, Lewi, Elias, 2018, RiftVolc GPS Network - ASRG-Southern Rim P.S., UNAVCO, GPS/GNSS Observations Dataset, 
https://doi.org/10.7283/Q8NN-2542