TOURNAI (BE)
Quarry blast29 October 2020
- Magnitude
- 2.2ML
- Depth
- –
- Belgian time
- 13:05:382020-10-29
- UTC
- 12:05:382020-10-29
Main parameters
| Date and time | 2020-10-29 12:05:38 UTC 2020-10-29 13:05:38 Belgian time |
|---|---|
| Magnitude | ML 2.2 |
| Epicentral coordinates | 50.639° N, 3.399° E Uncertainty ± 11.1 km |
| Event ID | ROB 11200 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-10-29 23:10:12 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
- 32.4 – 104.4km
- Mean velocity, P wave
- 6.2km/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 0.17 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 | |||||
| LESLessines | 32.4 | 76 | 12:05:44.90+6.31 s | – | – |
| SKQSteenkerque | 48.2 | 88 | 12:05:47.00+8.41 s | 12:05:53.01+14.42 s | 6.01 |
| BRQBracquegnies | 55.1 | 108 | 12:05:48.30+9.71 s | – | – |
| RQRRonquières | 58.6 | 93 | 12:05:48.87+10.28 s | – | – |
| SNFSeneffe | 64.3 | 102 | 12:05:49.55+10.96 s | – | – |
| MRDMaredsous | 104.2 | 111 | 12:05:56.42+17.83 s | – | – |
| DOUDourbes | 104.4 | 125 | 12:05:56.29+17.70 s | 12:06:10.00+31.41 s | 13.71 |
Did you feel an earthquake?The inquiry takes just a few minutes. Every report helps seismologists assess the effects of the earthquake.
Take the inquiry