EUPEN (BE)
Quarry blast6 May 2021
- Magnitude
- 0.4ML
- Depth
- –
- Belgian time
- 14:57:182021-05-06
- UTC
- 12:57:182021-05-06
Main parameters
| Date and time | 2021-05-06 12:57:18 UTC 2021-05-06 14:57:18 Belgian time |
|---|---|
| Magnitude | ML 0.4 |
| Epicentral coordinates | 50.644° N, 6.011° E Uncertainty ± 3.1 km |
| Event ID | ROB 13340 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2021-05-07 08:30:06 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
- 3.9 – 29.2km
- Mean velocity, P wave
- 4.6km/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 0.21 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)4 stations | |||||
| MEMHMembach | 3.9 | 181 | 12:57:19.50+0.67 s | – | – |
| TNLTernell | 10.6 | 127 | 12:57:21.08+2.25 s | – | – |
| MRGMont Rigi | 15.4 | 163 | 12:57:21.59+2.76 s | – | – |
| LCHLa Chartreuse | 29.2 | 269 | 12:57:25.07+6.24 s | 12:57:27.83+9.00 s | 2.76 |
| Dutch seismic network (KNMI)1 station | |||||
| HGNHeimansgroeve | 14.5 | 337 | 12:57:21.52+2.69 s | – | – |
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