Dataset description: Chirp sub-bottom data acquired along the Cascadia margin during USGS field activity 2019-024-FA

Chirp sub-bottom data were collected by the U.S. Geological Survey in collaboration with the University of Washington (UW) in the summer of 2019 along the Cascadia submarine forearc offshore Oregon and Washington.
Keywordssub-bottom profiling, geospatial datasets, marine geophysics
Data typesSub Bottom Profiler
Amount57000 MB


Alicia F Balster-gee

Activities and equipment

2019-024-FAEdgetech 512i CHIRP (PCMSC)
Edgetech SB-512i Chirp subbottom profiler owned by Santa Cruz
2019-654-FA512 chirp
is a seismic reflection instrument that uses sound to examine the layering of sedimentary strata on and below the sea floor. The Chirp being used in this project is a modified version of the Subscan 512 made by Edgetech. The noise it makes actually sounds like a bird's chirp; the frequencies of the sound it produces are between 500 Hz and 12 kHz. The Chirp has two advantages that allow it to get excellent penetration (meaning it can see deep, like >50 m or >64 ft, into the seabed) and high resolution (meaning it can make out fine layering, layers