Both locations and magnitude values could be wrong.
The quality Q of manual solution, epicenter and focal depth are:
A - excellent, good;
B - good, fair;
C - fair, poor;
D - poor, poor.
Description of onset of P and S arrival:
I - impulsive or sharp;
E - emergent or gradual.
First motion direction of P and S arrival:
U - up, compression;
D - down, dilatation;
+ - poor U;
- - poor D;
N - noisy;
blank - not readable.
Weight assigned to P and S arrival:
0 or blank - full;
1 - 3/4;
2 - 1/2;
3 - 1/4;
4 - no.
