Depth

DEPTH: Value given in kilometers.

DEPTH CONTROL: (Dep on Screen Format)

A = Assigned.
D = Depth restrained based on 2 or more compatible pP phases and/or unidentified secondary arrivals used as pP.
N = Restrained to normal depth (33 km).
G = Restrained by geophysicist.
S = Depth control aided by S-phase data.
% = Questionable value (SSR catalog).
* = Less reliable depth estimate. Accuracy of depth lies between 8.5 km and 16 km based on 90% confidence ellipse.
? = Poor depth estimate; depth accuracy is estimated to be greater than 16 km based on 90% confidence ellipse.
Blank = Good depth estimate and depth unrestrained in contributed hypocenters from other networks. Depth accuracy is estimated to be less than 8.5 km based on 90% confidence ellipse.