2015-04-30 06:29:56 (UTC) :West of Ribeira Grande, Portugal
earthquake monitor, Portugal earthquake, earthquake realtime
Magnitude : 4.7
Event Time: Time and Date Starting of Earthquake Rupture
Location : Position of Epicenter
Depth : Depth of starting Rupture
a) 40km (25mi) W of Ribeira Grande, Portugal
b) 170km (106mi) W of Angra do Heroismo, Portugal
c) 318km (198mi) WNW of Ponta Delgada, Portugal
d) 1282km (797mi) NW of Camara de Lobos, Portugal
e) 1740km (1081mi) W of Lisbon, Portugal
± 3.8 km
Number of Phase Applied1
82.71 km (0.74°)
Travel Time Residual3
1Number of phase Applied:
In determining location of hypocenter, applied number of observations on P waves and S waves. The greater the more accurate prediction of EQ.
Horizontal distance of nearest Station measured in Km from epicenter. The smaller the more accuracy in prediction of depth of EQ.
3Travel Time Residual:
A way of measurement of fit of arrival time observed to arrival time predicted for particular location. The smaller the better fit of data.
Expressed in degree; the smaller the smaller the error in horizontal positioning of EQ. Large uncertainty is considered when exceeds 180° (both depth and location)