OLNE (BE)
Quarry blast24 February 2021
- Magnitude
- 1.2ML
- Depth
- –
- Belgian time
- 16:36:552021-02-24
- UTC
- 15:36:552021-02-24
Main parameters
| Date and time | 2021-02-24 15:36:55 UTC 2021-02-24 16:36:55 Belgian time |
|---|---|
| Magnitude | ML 1.2 |
| Epicentral coordinates | 50.588° N, 5.714° E Uncertainty ± 3.0 km |
| Event ID | ROB 12590 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2021-03-01 09:23:54 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
- 6
- Epicentral distance
- 9.9 – 34.7km
- Mean velocity, P wave
- 5.9km/s
- Mean velocity, S wave
- 3.3km/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: 6 measurements, root-mean-square deviation 0.56 s. S wave: 5 measurements, root-mean-square deviation 0.26 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)6 stations | |||||
| LCHLa Chartreuse | 9.9 | 305 | 15:36:57.29+1.47 s | 15:36:59.37+3.55 s | 2.08 |
| MEMHMembach | 21.1 | 83 | 15:36:59.13+3.31 s | 15:37:02.91+7.09 s | 3.78 |
| EBNEben-Emael | 23.4 | 354 | 15:37:00.69+4.87 s | – | – |
| MRGMont Rigi | 27.0 | 108 | 15:37:00.03+4.21 s | 15:37:04.30+8.48 s | 4.27 |
| HOUHouvegnez | 33.2 | 141 | 15:37:02.39+6.57 s | 15:37:05.94+10.12 s | 3.55 |
| CLAClavier | 34.7 | 237 | 15:37:01.56+5.74 s | 15:37:06.68+10.86 s | 5.12 |