QUARRY BLAST
Suspected rockburst10 February 2004
- Magnitude
- –
- Depth
- –
- Belgian time
- 14:35:412004-02-10
- UTC
- 13:35:412004-02-10
Main parameters
| Date and time | 2004-02-10 13:35:41 UTC 2004-02-10 14:35:41 Belgian time |
|---|---|
| Magnitude | – |
| Epicentral coordinates | 50.611° N, 5.785° E Uncertainty ± 1.2 km |
| Event ID | ROB 1932 |
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
- 15.9 – 102.3km
- Mean velocity, P wave
- 5.3km/s
- Mean velocity, S wave
- 3.1km/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 1.10 s. S wave: 5 measurements, root-mean-square deviation 2.03 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 | ||||||
| MEMBMembach | 15.9 | 91 | 13:35:44.02+2.96 s | 13:35:45.75+4.69 s | 1.73 | 14.0 |
| GESGesves | 55.5 | 243 | 13:35:51.00+9.94 s | 13:35:57.42+16.36 s | 6.42 | 1.0 |
| KLBKalborn | 61.3 | 158 | 13:35:52.98+11.92 s | 13:36:00.75+19.69 s | 7.77 | 1.0 |
| RCHRochefort | 64.4 | 218 | 13:35:50.45+9.39 s | 13:35:57.10+16.04 s | 6.65 | 3.0 |
| DOUDourbes | 102.3 | 236 | 13:35:59.26+18.20 s | 13:36:15.39+34.33 s | 16.13 | 2.0 |