WUPPERTAL (DE)
Quarry blast5 May 2021
- Magnitude
- 1.8ML
- Depth
- –
- Belgian time
- 11:49:482021-05-05
- UTC
- 09:49:482021-05-05
Main parameters
| Date and time | 2021-05-05 09:49:48 UTC 2021-05-05 11:49:48 Belgian time |
|---|---|
| Magnitude | ML 1.8 |
| Epicentral coordinates | 51.281° N, 6.996° E Uncertainty ± 5.0 km |
| Event ID | ROB 13305 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2021-05-06 07:57:48 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
- 6
- Epicentral distance
- 94.2 – 145.5km
- Mean velocity, P wave
- 12.8km/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: 4 measurements, root-mean-square deviation 0.31 s.
Stations farther than 120 km are left out of the fit: the first waves to reach them have travelled beneath the crust, through the mantle, where they propagate faster.
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 | |||||
| TNLTernell | 98.4 | 219 | 09:50:05.66+17.19 s | 09:50:16.99+28.52 s | 11.33 |
| MEMSMembach | 101.9 | 223 | 09:50:05.57+17.10 s | 09:50:17.81+29.34 s | 12.24 |
| MRGMont Rigi | 107.4 | 217 | 09:50:06.77+18.30 s | 09:50:20.04+31.57 s | 13.27 |
| HOUHouvegnez | 124.5 | 215 | 09:50:09.65+21.18 s | 09:50:23.55+35.08 s | 13.90 |
| KLBKalborn | 145.5 | 206 | 09:50:12.13+23.66 s | 09:50:29.21+40.74 s | 17.08 |
| Dutch seismic network (KNMI)1 station | |||||
| HGNHeimansgroeve | 94.2 | 233 | 09:50:05.70+17.23 s | – | – |