OLNE (BE)
Quarry blast20 March 2020
- Magnitude
- 1.3ML
- Depth
- –
- Belgian time
- 13:51:412020-03-20
- UTC
- 12:51:412020-03-20
Main parameters
| Date and time | 2020-03-20 12:51:41 UTC 2020-03-20 13:51:41 Belgian time |
|---|---|
| Magnitude | ML 1.3 |
| Epicentral coordinates | 50.594° N, 5.724° E Uncertainty ± 0.6 km |
| Event ID | ROB 9555 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-03-20 15:02:00 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
- 8
- Epicentral distance
- 10.1 – 50.8km
- Mean velocity, P wave
- 5.8km/s
- Mean velocity, S wave
- 3.4km/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: 8 measurements, root-mean-square deviation 1.72 s. S wave: 8 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)7 stations | |||||
| LCHLa Chartreuse | 10.1 | 299 | 12:51:42.38+1.38 s | 12:51:44.26+3.26 s | 1.88 |
| MEMHMembach | 20.3 | 85 | 12:51:44.90+3.90 s | 12:51:47.64+6.64 s | 2.74 |
| EBNEben-Emael | 22.8 | 352 | 12:51:50.25+9.25 s | 12:51:48.56+7.56 s | −1.69 |
| MRGMont Rigi | 26.6 | 110 | 12:51:45.88+4.88 s | 12:51:49.33+8.33 s | 3.45 |
| HOUHouvegnez | 33.4 | 143 | 12:51:46.86+5.86 s | 12:51:51.03+10.03 s | 4.17 |
| CLAClavier | 35.7 | 237 | 12:51:47.17+6.17 s | 12:51:52.67+11.67 s | 5.50 |
| GESGesves | 50.8 | 243 | 12:51:50.34+9.34 s | 12:51:56.66+15.66 s | 6.32 |
| Dutch seismic network (KNMI)1 station | |||||
| HGNHeimansgroeve | 23.9 | 38 | 12:51:45.30+4.30 s | 12:51:48.92+7.92 s | 3.62 |