Subsidence of caldera floor impedes ability to transmit data

Subsidence of caldera floor impedes ability of NPIT GPS station to ...

Detailed Description

Location of the NPIT GPS station, relative to the Hawaiian Volcano Observatory (HVO). Beginning on June 8, 2018, a portion of the caldera floor north of Halema'uma'u, where NPIT was located, began to slump into the crater. Over the next ten days NPIT GPS recorded down-dropping of 6-8 m (20-25 ft) with each summit explosion event, which have been occurring almost every day. This, together with earlier displacements, added up to a position change of 95 m (310 ft) down, 55 m (180 ft) south, and 5 m (16 ft) east. The large motions have now resulted in a misalignment of the radio shot between the instrument and the observatory, cutting off communication, and therefore data flow, from the GPS station.


Image Dimensions: 1400 x 881

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