MANUAL Location - Area: Alpi Cozie , magnitude (ML): 0.6
2025-10-31 13:44:18 (UTC)

Regional Seismic Network of Northwestern Italy (Distav, University of Genoa)
Posted on: 2025-10-31 14:12:26

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Earthquake info - Manual location
Event - ID :251031134215
Magnitude (ML) :0.6 +/- 0.2
Origin Time :2025-10-31 13:44:18.518 (UTC)
Location : Latitude: 44.617 N, Longitude: 7.252 E
Area :Alpi Cozie
Depth (km) :6.01
Distances (km) : 5.2 --- Frassino
6.2 --- Sanfront
6.5 --- Sampeyre
7.7 --- Gambasca
7.8 --- Paesana
8.0 --- Melle
8.3 --- Oncino
8.6 --- Rifreddo
9.0 --- Martiniana Po
9.9 --- Ostana
10.0 --- Brossasco
10.7 --- Isasca
10.9 --- Valmala
11.8 --- Revello
11.9 --- Crissolo
12.0 --- Envie
12.3 --- Brondello
12.9 --- Venasca
13.6 --- Barge
14.0 --- Pagno

Quality location estimate: Erh: 2 km, Erz: 3.6 km, Nf: 26, Gap: 116 °, Rms: 0.23


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.
PZZGU2025-10-31 13:44:22.1300.00400.001.742025-10-31 13:44:24.1600.0400-0.530.5317.9
BHBGU2025-10-31 13:44:22.3210.0200-0.940.132025-10-31 13:44:26.4400.0400-0.031.6225.1
VINDIV2025-10-31 13:44:25.2440.02000.221.012025-10-31 13:44:29.5630.0400-0.021.5635.2
SURFFR2025-10-31 13:44:25.2500.0130-0.580.512025-10-31 13:44:29.7240.1002-1.440.0138.4
STVGU2025-10-31 13:44:26.1050.02000.081.582025-10-31 13:44:31.0800.1283-0.161.1342.3
ENRGU2025-10-31 13:44:26.5400.0180-0.031.632025-10-31 13:44:32.2250.10020.061.4245.6
ISOFR2025-10-31 13:44:27.9820.02000.260.922025-10-31 13:44:33.9260.0400-0.121.2451.2
GBOSGU2025-10-31 13:44:29.4680.02000.121.462025-10-31 13:44:36.9040.10020.161.1963.0
SAOFFR2025-10-31 13:44:31.8820.02000.221.112025-10-31 13:44:40.2560.0400-0.610.5074.3
MGROGU2025-10-31 13:44:32.0470.0200-0.181.072025-10-31 13:44:41.2710.0400-0.600.5278.1
MVIFFR2025-10-31 13:44:33.4540.02000.480.312025-10-31 13:44:42.5920.0400-0.710.4380.7
ROROGU2025-10-31 13:44:33.0760.0200-0.091.332025-10-31 13:44:42.9040.0400-0.280.9285.9
PCPGU2025-10-31 13:44:35.9880.0200-0.011.402025-10-31 13:44:48.6650.04000.360.73102.9


Local magnitude (ML) calculation results
Station Net Channels Stat. Mag. Wood-And.
Ampl.
Dist. (km) Azimuth
PZZ GUHH0.551.96e-117.9221
BHB GUHH0.454.42e-225.12
STV GUHH0.702.16e-242.3172
ISO FRHH0.278.19e-351.2198
SAOF FRHH0.293.84e-374.3161
MGRO GUHH0.495.43e-378.1145
RORO GUHH0.991.40e-285.9131
PCP GUHH0.796.27e-3102.994


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.
(°)
PZZ GUHHZ3.2494e-53.4008e-61.4957e-63.8814e-72.2849e-73.3145e-58.7874e-64.0942e-77.9207e-817.9221
PZZ GUHHN3.3288e-54.3237e-61.4931e-63.3281e-71.8579e-77.2846e-55.3102e-63.6914e-79.3814e-817.9221
PZZ GUHHE2.6769e-52.8560e-61.8331e-64.7389e-72.5283e-74.5090e-59.4705e-63.9382e-78.3210e-817.9221
BHB GUHHZ8.5138e-61.0232e-64.6193e-71.1131e-77.1872e-82.1981e-52.1264e-61.3255e-72.2472e-825.12
BHB GUHHN6.9416e-68.6522e-73.9378e-78.3399e-84.8226e-82.3701e-51.7325e-68.0406e-81.8196e-825.12
BHB GUHHE8.9039e-61.1802e-63.4301e-71.0415e-74.9900e-81.9555e-51.8166e-69.4331e-82.6471e-825.12
STV GUHHZ2.7973e-63.2836e-71.3059e-73.4430e-82.0195e-83.5998e-66.9122e-73.2122e-85.5776e-942.3172
STV GUHHN3.1040e-63.0105e-71.2203e-73.5868e-81.8233e-83.2990e-65.1538e-72.8722e-86.0543e-942.3172
STV GUHHE4.1890e-65.1086e-71.5721e-74.8590e-82.6330e-81.0912e-55.3702e-74.8148e-81.0425e-842.3172
ENR GUHHZ9.8388e-68.9592e-73.0350e-78.1999e-84.1904e-81.3796e-51.2531e-67.3480e-81.7674e-845.6163
ENR GUHHN2.0578e-51.7886e-65.1312e-71.5317e-78.3358e-82.5457e-51.9424e-61.6652e-73.6229e-845.6163
ENR GUHHE2.7665e-52.4869e-66.9698e-71.7259e-71.3522e-72.4045e-53.7783e-62.3405e-73.6444e-845.6163
ISO FRHHZ1.3642e-61.7832e-77.6344e-83.6569e-82.3483e-82.9982e-63.6249e-74.1340e-87.2756e-951.2198
ISO FRHHN1.5150e-61.6409e-74.9656e-81.8439e-89.1316e-92.1233e-61.6116e-71.6316e-83.6521e-951.2198
ISO FRHHE1.5076e-61.7151e-77.4395e-82.5835e-81.2084e-83.3982e-61.7853e-71.9514e-83.8859e-951.2198
GBOS GUHHZ1.7728e-63.5676e-72.4079e-77.0380e-82.8294e-86.7511e-61.1911e-64.7384e-87.4406e-963.0132
GBOS GUHHN1.6733e-62.5477e-71.8523e-74.8564e-82.4879e-83.3071e-61.0583e-63.6670e-86.9609e-963.0132
GBOS GUHHE1.2186e-62.0599e-71.3091e-75.2011e-82.0480e-83.2770e-65.9239e-72.9887e-85.3222e-963.0132
SAOF FRHHZ2.7690e-75.0090e-84.1567e-81.7872e-81.5375e-87.9402e-71.9414e-72.2192e-81.6528e-974.3161
SAOF FRHHN2.8523e-74.2029e-83.1459e-81.8788e-81.5891e-86.7055e-71.2032e-72.1181e-81.6525e-974.3161
SAOF FRHHE3.2793e-73.6956e-82.6824e-81.8716e-81.4044e-86.8077e-71.0836e-72.1927e-81.2342e-974.3161
MGRO GUHHZ2.8489e-75.0201e-83.2411e-83.4016e-81.7897e-85.8880e-71.1421e-72.3766e-81.7080e-978.1145
MGRO GUHHN4.5869e-76.0034e-84.1702e-82.5406e-81.8918e-81.1589e-61.9334e-72.7941e-82.3306e-978.1145
MGRO GUHHE3.1422e-75.7720e-84.2169e-82.6877e-81.7433e-89.5705e-72.3488e-72.0823e-81.8544e-978.1145
RORO GUHHZ1.2456e-61.1947e-76.1836e-82.4379e-81.5965e-82.2148e-62.8041e-72.9478e-83.4377e-985.9131
RORO GUHHN1.1477e-61.4894e-71.0083e-73.1488e-81.4647e-81.9785e-63.6395e-72.2322e-83.4901e-985.9131
RORO GUHHE1.3291e-62.0318e-78.7089e-83.4754e-83.9271e-83.2275e-62.7206e-76.8932e-87.8096e-985.9131
PCP GUHHZ3.6218e-76.6168e-85.6078e-83.4442e-81.2053e-86.2603e-72.8194e-71.5936e-81.8033e-9102.994
PCP GUHHN4.3980e-76.4934e-84.3769e-82.1528e-81.4501e-88.2914e-72.6301e-71.9385e-81.9244e-9102.994
PCP GUHHE3.7332e-78.0247e-85.1868e-82.1154e-81.4346e-87.9754e-73.9464e-72.1273e-81.8795e-9102.994
*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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