QUARRY BLAST
Known mine explosion19 January 2004
- Magnitude
- –
- Depth
- –
- Belgian time
- 11:44:162004-01-19
- UTC
- 10:44:162004-01-19
Main parameters
| Date and time | 2004-01-19 10:44:16 UTC 2004-01-19 11:44:16 Belgian time |
|---|---|
| Magnitude | – |
| Epicentral coordinates | 50.800° N, 4.600° E Uncertainty ± 7.2 km |
| Event ID | ROB 1926 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2009-05-30 18:17:43 Belgian time
Location map
- Epicentre
- Station that recorded the event
Arrival times at the stations
Each station first records the P wave, the fastest, then the S wave. The farther a station is from the epicentre, the later the waves reach it and the wider the gap between the two.
- Stations
- 5
- Epicentral distance
- 39.2 – 101.8km
- Mean velocity, P wave
- 6.3km/s
- Mean velocity, S wave
- 4.3km/s
- P wave
- S wave
- Curve fitted to the measurements
Notes and method
Curves: travel time of a direct wave in a homogeneous medium. The velocity of each wave and an origin-time shift, common to both, are fitted to the measurements by least squares. Depth not determined: hypocenter placed at the surface for the calculation. P wave: 5 measurements, root-mean-square deviation 2.79 s. S wave: 5 measurements, root-mean-square deviation 2.45 s.
Station measurements
P- and S-wave arrivals and ground displacement measured at each station. Click a column heading to change the order.
| km | ° | UTC | UTC | s | nm | |
|---|---|---|---|---|---|---|
| Belgian seismic network (Royal Observatory of Belgium)5 stations | ||||||
| SNFSeneffe | 39.2 | 215 | 10:44:21.90+5.29 s | 10:44:27.11+10.50 s | 5.21 | 9.0 |
| GESGesves | 57.6 | 143 | 10:44:33.35+16.74 s | 10:44:33.73+17.12 s | 0.38 | 12.0 |
| DOUDourbes | 78.4 | 180 | 10:44:32.12+15.51 s | 10:44:41.92+25.31 s | 9.80 | 9.0 |
| RCHRochefort | 84.4 | 148 | 10:44:33.03+16.42 s | 10:44:36.53+19.92 s | 3.50 | 7.0 |
| MEMBMembach | 101.8 | 101 | 10:44:34.17+17.56 s | 10:44:41.44+24.83 s | 7.27 | 6.0 |