SPRIMONT (BE)
Quarry blast11 September 2018
- Magnitude
- 1.1ML
- Depth
- –
- Belgian time
- 16:01:242018-09-11
- UTC
- 14:01:242018-09-11
Main parameters
| Date and time | 2018-09-11 14:01:24 UTC 2018-09-11 16:01:24 Belgian time |
|---|---|
| Magnitude | ML 1.1 |
| Epicentral coordinates | 50.503° N, 5.604° E Uncertainty ± 3.5 km |
| Event ID | ROB 7160 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2018-09-12 15:18:16 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
- 23.4 – 57.5km
- Mean velocity, P wave
- 6.4km/s
- Mean velocity, S wave
- 3.5km/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: 4 measurements, root-mean-square deviation 0.31 s. S wave: 5 measurements, root-mean-square deviation 0.31 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 | |
|---|---|---|---|---|---|
| Belgian seismic network (Royal Observatory of Belgium)5 stations | |||||
| CLAClavier | 23.4 | 247 | 14:01:27.63+3.09 s | 14:01:31.30+6.76 s | 3.67 |
| HOUHouvegnez | 32.9 | 120 | 14:01:29.93+5.39 s | 14:01:34.04+9.50 s | 4.11 |
| MRGMont Rigi | 33.4 | 88 | 14:01:29.80+5.26 s | 14:01:34.03+9.49 s | 4.23 |
| GESGesves | 39.0 | 251 | 14:01:30.68+6.14 s | 14:01:36.35+11.81 s | 5.67 |
| KLBKalborn | 57.5 | 141 | – | 14:01:40.71+16.17 s | – |