YVOIR (BE)
Quarry blast26 February 2020
- Magnitude
- 1.1ML
- Depth
- –
- Belgian time
- 16:41:042020-02-26
- UTC
- 15:41:042020-02-26
Main parameters
| Date and time | 2020-02-26 15:41:04 UTC 2020-02-26 16:41:04 Belgian time |
|---|---|
| Magnitude | ML 1.1 |
| Epicentral coordinates | 50.339° N, 4.877° E Uncertainty ± 1.1 km |
| Event ID | ROB 9350 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-02-26 16:52:54 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
- 10
- Epicentral distance
- 8.8 – 88.4km
- Mean velocity, P wave
- 5.7km/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: 10 measurements, root-mean-square deviation 0.34 s. S wave: 5 measurements, root-mean-square deviation 0.41 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)9 stations | |||||
| MRDMaredsous | 8.8 | 242 | 15:41:06.66+2.08 s | 15:41:07.07+2.49 s | 0.41 |
| GESGesves | 15.8 | 71 | 15:41:07.61+3.03 s | 15:41:09.87+5.29 s | 2.26 |
| CLAClavier | 31.5 | 73 | 15:41:10.52+5.94 s | 15:41:14.37+9.79 s | 3.85 |
| RCHRochefort | 32.3 | 129 | 15:41:10.43+5.85 s | 15:41:14.17+9.59 s | 3.74 |
| DOUDourbes | 33.8 | 217 | 15:41:11.12+6.54 s | 15:41:15.70+11.12 s | 4.58 |
| TGATangissart | 38.8 | 320 | 15:41:11.25+6.67 s | – | – |
| RQRRonquières | 55.0 | 303 | 15:41:14.11+9.53 s | – | – |
| EBNEben-Emael | 76.3 | 48 | 15:41:17.58+13.00 s | – | – |
| MEMSMembach | 85.9 | 69 | 15:41:19.86+15.28 s | – | – |
| Dutch seismic network (KNMI)1 station | |||||
| HGNHeimansgroeve | 88.4 | 57 | 15:41:20.83+16.25 s | – | – |