MANUAL Location - Area: Riviera di ponente , magnitude (ML): 0.4
2021-10-19 18:55:46 (UTC)

Regional Seismic Network of Northwestern Italy (Distav, University of Genoa)
Posted on: 2021-10-20 06:37:26

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Earthquake info - Manual location
Event - ID :211019185523
Magnitude (ML) :0.4 +/- 0.2
Origin Time :2021-10-19 18:55:46.902 (UTC)
Location : Latitude: 43.872 N, Longitude: 7.675 E
Area :Riviera di ponente
Depth (km) :6.97
Distances (km) : 0.7 --- Perinaldo
1.7 --- Apricale
2.9 --- Isolabona
4.7 --- Dolceacqua
5.0 --- Soldano
5.1 --- Baiardo
5.2 --- Seborga
6.1 --- San Biagio della Cima
6.4 --- Rocchetta Nervina
6.4 --- Castel Vittorio
6.4 --- Vallebona
7.0 --- Pigna
7.2 --- Camporosso
8.0 --- Ceriana
8.5 --- Ospedaletti
9.7 --- Airole
9.8 --- Vallecrosia
9.8 --- San Remo
9.9 --- Bordighera
10.4 --- Ventimiglia

Quality location estimate: Erh: 0.6 km, Erz: 0.9 km, Nf: 22, Gap: 148 °, Rms: 0.15


Manual location results
Station Net P arrival time P pick
err
P pick
weight
P res Nll
weight
S arrival time S pick
err
S pick
weight
S res Nll
weight
Dist.
BURYGU2021-10-19 18:55:50.0700.01300.021.732021-10-19 18:55:52.2900.0511-0.011.6715.4
SAOFFR2021-10-19 18:55:51.0300.01200.460.212021-10-19 18:55:53.4060.23060.101.0117.5
IMIGU2021-10-19 18:55:50.7500.0120-0.011.762021-10-19 18:55:53.5900.0581-0.051.5019.6
MGROGU2021-10-19 18:55:51.4900.0170-0.390.392021-10-19 18:55:54.7880.0992-0.870.0423.4
ESCAFR2021-10-19 18:55:51.6510.0602-0.630.102021-10-19 18:55:56.6800.07920.480.2425.6
TURFFR2021-10-19 18:55:52.6530.02000.190.662021-10-19 18:55:56.3810.1303-0.180.9926.3
MVIFFR2021-10-19 18:55:55.3220.10040.011.402021-10-19 18:56:01.4920.1293-0.061.1642.5
GBOSGU2021-10-19 18:55:55.1100.06020.041.482021-10-19 18:56:00.7340.19250.001.0843.9
ENRGU2021-10-19 18:55:55.3440.06020.011.522021-10-19 18:56:01.0780.0400-0.081.2645.5
STVGU2021-10-19 18:55:55.8120.0200-0.380.462021-10-19 18:56:02.4840.1534-0.091.0950.6
PZZGU2021-10-19 18:56:02.1440.02000.061.272021-10-19 18:56:12.4930.0400-0.120.9983.9


Local magnitude (ML) calculation results
Station Net Channels Stat. Mag. Wood-And.
Ampl.
Dist. (km) Azimuth
BURY GUHH0.247.29e-215.4224
IMI GUHH0.631.59e-119.676
ESCA FRHH0.515.38e-225.6259
GBOS GUHH0.489.24e-343.918
ENR GUHH0.017.85e-345.5333
STV GUHH0.519.78e-350.6326
PZZ GUHH0.396.23e-383.9328


Results of PGA, PGV, IH, spectral amplitudes (SA) values calculation
Station Net Channel PGA
(g)
PGV
(m/s)
IH 0*
(m)
IH 1*
(m)
IH 2*
(m)
Sa(T=0.10)
(g)
Sa(T=0.30)
(g)
Sa(T=1.00)
(g)
Sa(T=3.00)
(g)
Dist.
(km)
Azim.
(°)
BURY GUHHZ9.2001e-61.2218e-63.5041e-71.0955e-75.7903e-81.1556e-51.5112e-61.2316e-72.4626e-815.4224
BURY GUHHN1.8087e-52.0383e-64.4167e-71.3783e-79.2902e-82.4266e-51.8463e-61.6843e-73.8551e-815.4224
BURY GUHHE1.7994e-51.3163e-63.1598e-71.4559e-76.5103e-81.3355e-51.4657e-68.7952e-82.5575e-815.4224
IMI GUHHZ1.0590e-51.1885e-62.4440e-77.0313e-84.4165e-81.2459e-51.0709e-69.1083e-82.1679e-819.676
IMI GUHHN1.8767e-52.7411e-68.3807e-72.7157e-71.5680e-74.6098e-53.0730e-62.7715e-76.1833e-819.676
IMI GUHHE3.1104e-54.0983e-69.9731e-72.7924e-71.7034e-75.9889e-53.6328e-63.3488e-77.6907e-819.676
MGRO GUHHZ1.9122e-61.8835e-77.9820e-84.7031e-81.8735e-83.6679e-62.6943e-72.2440e-83.3613e-923.429
MGRO GUHHN1.6266e-61.9270e-71.1295e-77.9357e-83.5120e-83.5225e-64.2181e-74.6297e-84.9293e-923.429
MGRO GUHHE2.4576e-62.8167e-71.5429e-75.6216e-82.7430e-83.9637e-66.6011e-74.0089e-86.3429e-923.429
ESCA FRHHZ1.4876e-62.5470e-72.0275e-71.1013e-75.5859e-83.3840e-68.1662e-78.1746e-89.3986e-925.6259
ESCA FRHHN3.6197e-66.2479e-73.8623e-72.0344e-79.5468e-81.0056e-51.5462e-61.4421e-71.7789e-825.6259
ESCA FRHHE2.5978e-65.1292e-73.3048e-71.6029e-76.6269e-86.7455e-61.9518e-69.2343e-81.2037e-825.6259
TURF FRHHZ8.3089e-71.6430e-77.7728e-83.3291e-81.5024e-82.0507e-63.1306e-72.2464e-83.6132e-926.3297
TURF FRHHN1.7964e-62.4329e-77.4658e-83.5053e-81.6499e-82.4791e-63.4072e-72.1072e-85.2557e-926.3297
TURF FRHHE1.5223e-62.1208e-71.1246e-74.2988e-82.0496e-83.6161e-63.6457e-72.6575e-84.3992e-926.3297
GBOS GUHHZ5.4447e-76.9416e-84.2745e-81.8868e-81.0082e-81.6605e-61.8825e-71.0133e-81.5867e-943.918
GBOS GUHHN6.0140e-75.6370e-83.7117e-82.8742e-82.1232e-81.6488e-61.8333e-72.5573e-83.0747e-943.918
GBOS GUHHE5.1681e-78.6637e-87.1499e-84.0457e-81.6709e-81.9487e-64.3447e-72.4914e-82.8732e-943.918
ENR GUHHZ7.3226e-78.9396e-83.3973e-81.6902e-89.1100e-91.6690e-61.4627e-71.2169e-81.8937e-945.5333
ENR GUHHN1.8063e-61.6927e-76.3870e-82.3439e-81.3027e-83.0095e-62.9197e-72.2367e-83.6480e-945.5333
ENR GUHHE1.8496e-61.7260e-74.2717e-81.5199e-86.8349e-91.9336e-61.5829e-71.1695e-82.9716e-945.5333
STV GUHHZ6.9696e-71.0515e-75.6238e-81.5929e-88.3305e-91.2973e-62.6517e-71.4164e-82.1561e-950.6326
STV GUHHN6.9953e-71.5961e-77.5979e-82.1489e-81.2813e-81.2113e-63.2215e-72.0141e-83.2298e-950.6326
STV GUHHE1.0790e-61.1957e-77.5600e-82.8114e-81.2484e-81.5144e-65.5146e-71.8224e-82.5525e-950.6326
PZZ GUHHZ3.1661e-75.3891e-83.4049e-81.3752e-86.3852e-97.9788e-71.3880e-78.3494e-91.5394e-983.9328
PZZ GUHHN3.8420e-76.8876e-84.2187e-82.3838e-81.5530e-87.1478e-71.7212e-72.5405e-82.0462e-983.9328
PZZ GUHHE3.3045e-74.9607e-83.6460e-81.7360e-88.3736e-96.2344e-72.3828e-71.1049e-81.3219e-983.9328
*IH (Housner Intensity) calculated on the velocity spectrum (SV) between 0.1 and 0.5 s (IH0), 0.1 and 1.0 s (IH1), 0.1 and 1.5 s (IH2)

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