MANUAL Location - Area: Alpi Cozie , magnitude (ML): 0.4
2025-09-16 23:45:59 (UTC)

Regional Seismic Network of Northwestern Italy (Distav, University of Genoa)
Posted on: 2025-09-17 06:56:52

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Earthquake info - Manual location
Event - ID :250916234535
Magnitude (ML) :0.4 +/- 0.2
Origin Time :2025-09-16 23:45:59.941 (UTC)
Location : Latitude: 44.383 N, Longitude: 7.312 E
Area :Alpi Cozie
Depth (km) :9.52
Distances (km) : 3.0 --- Monterosso Grana
4.8 --- Pradleves
6.2 --- Valgrana
6.9 --- Valloriate
7.5 --- Demonte
7.7 --- Rittana
7.9 --- Montemale di Cuneo
8.5 --- Castelmagno
9.1 --- Gaiola
9.2 --- Moiola
9.8 --- Bernezzo
10.0 --- Caraglio
10.2 --- Dronero
10.7 --- Aisone
10.8 --- Cartignano
10.8 --- Roccabruna
11.1 --- Roccasparvera
12.4 --- Cervasca
12.4 --- Villar San Costanzo
12.7 --- San Damiano Macra

Quality location estimate: Erh: 0.8 km, Erz: 1.2 km, Nf: 32, Gap: 114 °, Rms: 0.34


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.
VINDIV2025-09-16 23:46:02.4700.0200-0.770.522025-09-16 23:46:04.2590.0400-1.230.2616.6
ENRGU2025-09-16 23:46:04.2000.01700.180.872025-09-16 23:46:06.7200.0641-0.111.4821.8
PZZGU2025-09-16 23:46:04.6300.02310.011.652025-09-16 23:46:07.6400.0701-0.310.9523.5
ISOFR2025-09-16 23:46:06.4100.02410.550.012025-09-16 23:46:09.8850.09420.041.4632.2
SURFFR2025-09-16 23:46:07.7500.0271-0.141.402025-09-16 23:46:12.7200.1314-0.900.5342.2
GBOSGU2025-09-16 23:46:08.2700.02410.041.592025-09-16 23:46:13.6610.1394-0.231.2146.0
TURFFR2025-09-16 23:46:08.8210.02000.121.262025-09-16 23:46:14.4800.2046-0.450.9146.8
SAOFFR2025-09-16 23:46:09.1130.02000.031.582025-09-16 23:46:14.7600.3577-0.740.6849.1
BHBGU2025-09-16 23:46:08.6690.0200-0.121.452025-09-16 23:46:15.0130.04000.121.1951.4
MLIGIV2025-09-16 23:46:09.3620.0200-0.600.572025-09-16 23:46:15.9350.0400-1.140.3753.8
MGROGU2025-09-16 23:46:09.7960.0200-0.360.862025-09-16 23:46:16.4060.1002-1.000.4755.9
MVIFFR2025-09-16 23:46:10.0640.0200-0.390.802025-09-16 23:46:17.0780.0400-0.980.4856.4
ESCAFR2025-09-16 23:46:11.3830.02000.121.272025-09-16 23:46:19.0580.0400-0.171.2962.4
ROROGU2025-09-16 23:46:11.8100.0200-0.081.522025-09-16 23:46:19.7400.2957-0.450.9267.9
IMIGU2025-09-16 23:46:12.2700.0200-0.061.542025-09-16 23:46:20.6480.0400-0.480.8370.8
RRLGU2025-09-16 23:46:12.9850.02000.031.482025-09-16 23:46:21.4010.0400-0.780.6073.6


Local magnitude (ML) calculation results
Station Net Channels Stat. Mag. Wood-And.
Ampl.
Dist. (km) Azimuth
ENR GUHH0.581.19e-121.8154
PZZ GUHH0.357.41e-223.5311
ISO FRHH-0.049.87e-332.2223
GBOS GUHH0.801.74e-246.0110
TURF FRHH0.116.71e-346.8172
SAOF FRHH0.146.59e-349.1156
BHB GUHH0.297.71e-351.4356
MGRO GUHH0.388.74e-355.9134
ESCA FRHH0.356.50e-362.4175
RORO GUHH0.701.20e-267.9116
IMI GUHH0.551.06e-270.8138
RRL GUHH0.615.53e-373.6326


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.
(°)
ENR GUHHZ2.2831e-52.5286e-64.1192e-71.3548e-77.3027e-82.2521e-51.7456e-61.7447e-74.4871e-821.8154
ENR GUHHN3.7589e-53.8712e-65.7713e-72.2254e-71.4340e-73.3039e-52.6914e-62.8851e-77.2166e-821.8154
ENR GUHHE4.2357e-53.6379e-65.1216e-71.5751e-79.4985e-82.2344e-52.0310e-62.5200e-75.3915e-821.8154
PZZ GUHHZ7.0258e-69.9721e-76.1007e-71.8216e-79.9227e-81.7299e-53.4739e-61.5103e-72.3563e-823.5311
PZZ GUHHN9.3947e-61.1958e-65.6618e-71.8759e-71.0383e-72.9342e-53.0099e-61.7833e-73.3767e-823.5311
PZZ GUHHE5.2596e-68.4879e-74.8169e-71.5449e-78.1343e-81.2764e-52.6058e-61.1724e-71.6328e-823.5311
ISO FRHHZ1.6390e-62.3482e-77.4966e-82.4985e-81.6611e-84.1361e-63.1574e-72.5336e-85.1148e-932.2223
ISO FRHHN1.9098e-62.3845e-75.8204e-81.6613e-81.1421e-83.5925e-62.0866e-72.2618e-84.6073e-932.2223
ISO FRHHE1.6275e-61.9410e-75.6455e-82.0465e-81.4019e-82.6368e-62.4615e-72.3682e-84.6962e-932.2223
GBOS GUHHZ1.7990e-63.5331e-71.5581e-74.9409e-82.6501e-84.0737e-67.3098e-73.5961e-87.6470e-946.0110
GBOS GUHHN1.6301e-62.9506e-71.5254e-75.3122e-82.6613e-83.2678e-64.0380e-74.0637e-85.6087e-946.0110
GBOS GUHHE1.0542e-62.3353e-71.5926e-75.2036e-82.3680e-83.4056e-68.3492e-73.5772e-86.1741e-946.0110
TURF FRHHZ6.0532e-71.0192e-74.3660e-82.2075e-81.8764e-81.9836e-61.9480e-73.5888e-82.3145e-946.8172
TURF FRHHN1.0601e-61.3806e-75.7652e-82.9912e-82.3904e-82.7231e-63.0644e-73.3025e-82.9649e-946.8172
TURF FRHHE4.5953e-78.2382e-84.1445e-82.1360e-81.8662e-81.6289e-61.6375e-72.8612e-82.1898e-946.8172
SAOF FRHHZ3.8111e-75.5362e-84.6287e-82.5665e-82.1365e-81.0245e-62.6136e-72.9116e-82.0731e-949.1156
SAOF FRHHN4.3030e-76.4602e-84.6849e-82.8566e-82.4445e-89.2081e-72.4423e-73.2860e-82.1225e-949.1156
SAOF FRHHE4.2837e-77.0260e-85.2045e-82.7383e-81.8028e-89.1808e-73.8191e-72.6210e-82.5084e-949.1156
BHB GUHHZ9.0961e-71.0342e-74.5080e-82.5105e-81.9169e-81.6565e-61.3328e-74.0711e-82.8277e-951.4356
BHB GUHHN7.5343e-78.2009e-84.1462e-81.8631e-81.5228e-81.4755e-61.5543e-72.8108e-81.7488e-951.4356
BHB GUHHE1.1861e-61.4815e-75.3547e-83.0896e-81.8663e-82.1485e-61.6785e-73.6883e-82.9317e-951.4356
MGRO GUHHZ4.9079e-77.6253e-84.8412e-81.8513e-81.4872e-81.1544e-63.9041e-72.6037e-82.5196e-955.9134
MGRO GUHHN7.3846e-71.3218e-78.8004e-83.4133e-82.2100e-82.8325e-63.5289e-73.6877e-84.7607e-955.9134
MGRO GUHHE6.4651e-71.0674e-76.5187e-82.4982e-81.7026e-82.5345e-63.6496e-72.0890e-82.7636e-955.9134
ESCA FRHHZ9.0605e-79.9520e-84.1053e-82.1379e-81.7559e-81.1866e-61.6951e-72.0480e-82.5348e-962.4175
ESCA FRHHN8.0283e-71.0038e-75.9564e-83.2793e-82.2779e-81.3648e-62.1060e-73.2317e-82.8417e-962.4175
ESCA FRHHE7.0550e-77.9693e-84.7749e-82.9213e-82.3799e-81.2695e-62.2569e-73.0203e-82.8818e-962.4175
RORO GUHHZ9.4291e-71.3637e-77.6762e-82.3596e-81.5471e-83.1725e-63.1498e-72.1581e-83.9858e-967.9116
RORO GUHHN1.0615e-61.5529e-71.2245e-73.2362e-81.8574e-81.8489e-67.0125e-73.2063e-83.8675e-967.9116
RORO GUHHE1.1565e-61.6035e-78.8228e-82.3485e-81.8116e-82.1841e-63.6053e-72.8925e-83.1913e-967.9116
IMI GUHHZ6.9058e-71.0716e-74.3463e-83.0143e-83.0315e-81.3547e-61.6080e-74.8529e-83.3226e-970.8138
IMI GUHHN2.1280e-62.6373e-78.9445e-85.0168e-83.4453e-84.6137e-62.4365e-74.7629e-85.5631e-970.8138
IMI GUHHE1.2137e-61.5191e-75.2950e-82.7664e-82.6344e-81.5546e-62.3266e-73.8505e-83.9620e-970.8138
RRL GUHHZ1.7611e-72.0021e-81.2712e-89.1554e-97.9524e-94.3771e-71.0486e-71.1219e-87.8948e-1073.6326
RRL GUHHN2.0395e-72.9404e-81.8800e-81.4371e-81.4134e-86.9265e-79.9800e-82.0681e-89.7339e-1073.6326
RRL GUHHE1.5994e-73.7080e-81.7640e-81.7997e-82.5916e-85.8643e-78.4461e-84.3066e-89.7234e-973.6326
*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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