firs - gath
- first break count
- first break region
- first break tracking
- first maximum
- first motion
- first peak
- first signal
- first trough count
- first-arrival energy
- first-arrival plot
- first-arrival time
- first-break line
- first-break method
- first-break quality
- first-break time
- first-event method
- first-event observations
- first-event time
