EUPEN (BE)
Quarry blast23 September 2020
- Magnitude
- 1.5ML
- Depth
- –
- Belgian time
- 12:55:282020-09-23
- UTC
- 10:55:282020-09-23
Main parameters
| Date and time | 2020-09-23 10:55:28 UTC 2020-09-23 12:55:28 Belgian time |
|---|---|
| Magnitude | ML 1.5 |
| Epicentral coordinates | 50.639° N, 6.010° E Uncertainty ± 1.7 km |
| Event ID | ROB 10940 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2021-01-05 09:50:30 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
- 7
- Epicentral distance
- 3.3 – 31.7km
- Mean velocity, P wave
- 6.1km/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: 7 measurements, root-mean-square deviation 0.14 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 | |||||
| MEMHMembach | 3.3 | 180 | 10:55:29.66+0.68 s | – | – |
| MEMSMembach | 3.3 | 180 | 10:55:29.83+0.85 s | – | – |
| TNLTernell | 10.3 | 125 | 10:55:31.23+2.25 s | – | – |
| MRGMont Rigi | 14.9 | 162 | 10:55:31.76+2.78 s | 10:55:33.57+4.59 s | 1.81 |
| HOUHouvegnez | 31.7 | 181 | 10:55:34.55+5.57 s | 10:55:38.64+9.66 s | 4.09 |
| Dutch seismic network (KNMI)2 stations | |||||
| HGNHeimansgroeve | 15.0 | 338 | 10:55:31.60+2.62 s | 10:55:34.07+5.09 s | 2.47 |
| VKBValkenburg | 29.9 | 328 | 10:55:34.06+5.08 s | – | – |
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