NAMUR (BE)
Quarry blast28 February 2019
- Magnitude
- 1.9ML
- Depth
- –
- Belgian time
- 13:48:052019-02-28
- UTC
- 12:48:052019-02-28
Main parameters
| Date and time | 2019-02-28 12:48:05 UTC 2019-02-28 13:48:05 Belgian time |
|---|---|
| Magnitude | ML 1.9 |
| Epicentral coordinates | 50.490° N, 4.961° E Uncertainty ± 1.0 km |
| Event ID | ROB 7915 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2019-02-28 14:25:50 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
- 14.7 – 79.1km
- 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: 10 measurements, root-mean-square deviation 0.31 s. S wave: 4 measurements, root-mean-square deviation 0.11 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 | |||||
| GESGesves | 14.7 | 142 | 12:48:07.54+2.50 s | 12:48:09.56+4.52 s | 2.02 |
| MRDMaredsous | 25.0 | 213 | 12:48:10.06+5.02 s | 12:48:12.79+7.75 s | 2.73 |
| CLAClavier | 25.4 | 108 | 12:48:09.34+4.30 s | 12:48:12.62+7.58 s | 3.28 |
| RCHRochefort | 41.8 | 153 | 12:48:12.48+7.44 s | – | – |
| DOUDourbes | 51.1 | 211 | 12:48:14.53+9.49 s | – | – |
| SKQSteenkerque | 64.9 | 286 | 12:48:16.08+11.04 s | 12:48:24.30+19.26 s | 8.22 |
| MEMHMembach | 75.5 | 79 | 12:48:18.46+13.42 s | – | – |
| MEMSMembach | 75.5 | 79 | 12:48:18.47+13.43 s | – | – |
| MRGMont Rigi | 79.1 | 88 | 12:48:18.87+13.83 s | – | – |
| Dutch seismic network (KNMI)1 station | |||||
| VKBValkenburg | 71.7 | 54 | 12:48:17.25+12.21 s | – | – |