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

RiftVolc GPS Network - ADTU-Girmas House Adami Tullu P.S.
Start: 24-Mar-2013
End: 14-Jan-2020
Biggs, Juliet, Lewi, Elias, 2018, RiftVolc GPS Network - ADTU-Girmas House Adami Tullu P.S., UNAVCO, GPS/GNSS Observations Dataset, 
https://doi.org/10.7283/7T0V-KW83