Eyewitnesses launch LastQuake smartphone app very rapidly after M6.2 earthquake near Amatrice, Lazio, Italy on 24/08/2016 at 01:36 UTC.
The notification was sent to the App users 275 seconds after the earthquake.
We clearly see the rapidity of people's reaction as soon as they have felt the shake.
This map also shows that the earthquake was felt as far as Russia or UAE, more than 2,300 km away of the epicentre.
M7.8 Nepal earthquake 25/04/2015. Quick map of the area where the shake was felt.
When an earthquake is felt, eye-witnesses rush on the internet to find out the cause of the shaking. When they reach EMSC website, we automatically detect the surge of traffic, locate the eye-witnesses via their IP adress and map the area where the earthquake was felt.
This technique allows us to quickly detect felt earthquakes (within 1 or 2 min) and map the felt area before the first seismic data are available.