These files contain the earthquake parameters catalog of the Northern California Seismic Network from 1966 to present. They are available in the EHP CSV format. For documentation on the format, please go to:
https://earthquake.usgs.gov/earthquakes/feed/v1.0/csv.php
A current snapshot of these files can be found at:
http://ncedc.org/pub/catalogs/NCSS-catalogs/
The index.txt file contains a mapping between the commit times and the hash keys and can be used to retrieve a version of the catalog at a given time.
NCEDC Specific field values:
status: (Event status)
A: Automatic
F: Finalized
H: Human Reviewed
I: Intermediate
magType: (Magnitude Type)
a : Primary amplitude magnitude (Jerry Eaton's XMAG)
b : Body-wave magnitude
d : Duration magnitude
dl: Low-gain initial P-wave amplitude magnitude
e : Energy magnitude
h : Human assigned magnitude
l : Local magnitude
n : No magnitude
un: Unknown magnitude type
w : Moment magnitude
type: (EventType)
bc: Building collapse/demolition
eq: Earthquake
ex: Generic chemical blast
lp: Long period volcanic earthquake
ls: Landslide
mi: Meteor/comet impact
nt: Nuclear test
ot: Other miscellaneous
qb: Quarry blast
rs: Rockslide
sh: Refraction/reflection survey shot
sn: Sonic shockwave
st: Subnet trigger
th: Thunder
uk: Unknown type