MANUAL Location - Area: Alpi Cozie , magnitude (ML): 0.3
2025-10-18 07:04:31 (UTC)

Regional Seismic Network of Northwestern Italy (Distav, University of Genoa)
Posted on: 2025-10-18 14:00:45

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Earthquake info - Manual location
Event - ID :251018070255
Magnitude (ML) :0.3 +/- 0.2
Origin Time :2025-10-18 07:04:31.4 (UTC)
Location : Latitude: 44.383 N, Longitude: 7.305 E
Area :Alpi Cozie
Depth (km) :12.48
Distances (km) : 3.3 --- Monterosso Grana
4.5 --- Pradleves
6.8 --- Valgrana
7.3 --- Valloriate
7.5 --- Demonte
7.9 --- Castelmagno
8.3 --- Rittana
8.3 --- Montemale di Cuneo
9.6 --- Gaiola
9.6 --- Moiola
10.2 --- Aisone
10.4 --- Bernezzo
10.5 --- Dronero
10.5 --- Caraglio
10.7 --- Cartignano
10.9 --- Roccabruna
11.7 --- Roccasparvera
12.5 --- San Damiano Macra
12.7 --- Villar San Costanzo
13.0 --- Cervasca

Quality location estimate: Erh: 0.8 km, Erz: 0.9 km, Nf: 26, Gap: 158 °, 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.
VINDIV2025-10-18 07:04:34.8480.0200-0.061.512025-10-18 07:04:36.8520.0400-0.461.2618.1
STVGU2025-10-18 07:04:35.2100.01100.061.362025-10-18 07:04:37.2700.0601-0.481.2320.4
ENRGU2025-10-18 07:04:35.7400.01200.041.482025-10-18 07:04:38.2600.0701-0.411.1723.7
PZZGU2025-10-18 07:04:36.1600.0120-0.011.692025-10-18 07:04:39.0860.1334-0.491.1024.6
ISOFR2025-10-18 07:04:37.8440.02000.470.002025-10-18 07:04:41.3300.0982-0.081.2532.9
SURFFR2025-10-18 07:04:39.3000.0361-0.041.502025-10-18 07:04:44.6690.1283-0.401.1142.4
GBOSGU2025-10-18 07:04:39.8000.0291-0.051.462025-10-18 07:04:45.1100.1424-0.531.0047.3
TURFFR2025-10-18 07:04:40.3170.02000.071.192025-10-18 07:04:46.0900.1434-0.461.0647.6
SAOFFR2025-10-18 07:04:40.5520.0200-0.091.312025-10-18 07:04:46.4700.1544-0.680.7550.0
MLIGIV2025-10-18 07:04:40.8250.0200-0.700.612025-10-18 07:04:47.1260.0400-1.610.1954.7
MVIFFR2025-10-18 07:04:40.3820.0200-1.560.172025-10-18 07:04:49.0700.1755-0.510.9856.8
MGROGU2025-10-18 07:04:41.3500.0291-0.381.122025-10-18 07:04:48.1400.4078-0.940.4857.0
IMIGU2025-10-18 07:04:42.0490.0200-1.830.112025-10-18 07:04:52.2100.2156-0.560.8971.7


Local magnitude (ML) calculation results
Station Net Channels Stat. Mag. Wood-And.
Ampl.
Dist. (km) Azimuth
STV GUHH0.202.71e-220.4174
ENR GUHH0.457.59e-223.7152
PZZ GUHH0.194.77e-224.6313
ISO FRHH-0.186.91e-332.9223
GBOS GUHH0.601.05e-247.3110
TURF FRHH0.177.52e-347.6171
SAOF FRHH0.065.25e-350.0156
MGRO GUHH0.215.69e-357.0133
IMI GUHH0.571.08e-271.7138


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.
(°)
STV GUHHZ1.0509e-58.7590e-78.9378e-82.4183e-81.6218e-84.7493e-63.7970e-75.1328e-81.5160e-820.4174
STV GUHHN5.0091e-65.0420e-78.1702e-82.1380e-81.4827e-85.3218e-63.1353e-72.8753e-88.1392e-920.4174
STV GUHHE1.1019e-51.0736e-61.8638e-75.0670e-83.0345e-81.2519e-57.1960e-76.1849e-81.9761e-820.4174
ENR GUHHZ2.1621e-51.9838e-63.4627e-71.1597e-76.0866e-81.9363e-51.3092e-61.2632e-73.2964e-823.7152
ENR GUHHN3.1812e-52.4328e-63.8819e-71.0600e-76.6755e-82.4568e-51.5972e-61.6651e-74.4344e-823.7152
ENR GUHHE4.0188e-53.1988e-64.1588e-71.2749e-78.6050e-81.4580e-51.7689e-61.9914e-75.0551e-823.7152
PZZ GUHHZ3.6988e-65.8774e-72.7257e-79.1357e-83.8741e-88.5654e-61.1564e-66.0919e-81.3532e-824.6313
PZZ GUHHN6.6322e-68.1589e-74.9501e-71.4719e-76.1146e-88.2336e-61.8961e-69.6377e-81.6572e-824.6313
PZZ GUHHE4.7492e-65.7250e-73.2373e-77.9232e-83.9371e-88.4720e-69.3848e-76.4586e-81.3212e-824.6313
ISO FRHHZ8.9524e-71.2852e-77.0328e-82.4766e-81.2825e-82.3225e-64.2276e-72.0474e-83.2560e-932.9223
ISO FRHHN1.3016e-61.2970e-75.0573e-81.7096e-89.2832e-91.8267e-61.7287e-71.2173e-82.4965e-932.9223
ISO FRHHE1.0813e-61.4522e-74.7905e-81.3891e-89.4515e-92.1203e-62.0487e-71.4180e-83.1104e-932.9223
GBOS GUHHZ1.4271e-61.9586e-71.0247e-73.1617e-81.4561e-83.3236e-63.1086e-72.1203e-84.5341e-947.3110
GBOS GUHHN1.0190e-61.5964e-78.2045e-83.8771e-81.8377e-82.9069e-62.9379e-72.3107e-83.3875e-947.3110
GBOS GUHHE9.2303e-71.5132e-78.1424e-82.7837e-81.2819e-83.6041e-63.4229e-71.9247e-83.9255e-947.3110
TURF FRHHZ6.9830e-71.1656e-75.6607e-81.7877e-81.6223e-81.5739e-61.9490e-71.8440e-83.2256e-947.6171
TURF FRHHN1.0172e-61.1871e-77.2968e-81.8209e-81.3646e-82.0442e-62.8487e-72.0544e-82.9741e-947.6171
TURF FRHHE6.4466e-78.3813e-86.0597e-82.3439e-81.2132e-81.4419e-63.3147e-71.5748e-82.0090e-947.6171
SAOF FRHHZ3.0285e-75.5097e-84.0574e-81.6992e-81.0787e-81.1341e-62.3909e-71.3685e-82.2251e-950.0156
SAOF FRHHN3.8772e-74.7987e-83.0266e-81.6741e-81.1390e-86.7078e-71.2444e-71.3919e-81.3583e-950.0156
SAOF FRHHE4.2625e-77.2319e-84.3427e-82.2849e-81.5101e-81.0901e-63.1114e-71.6141e-81.4679e-950.0156
MGRO GUHHZ6.2717e-78.8008e-82.4228e-81.4828e-81.0759e-84.4845e-71.3669e-71.4427e-81.1920e-957.0133
MGRO GUHHN6.1139e-77.9511e-84.0454e-82.1247e-81.6864e-81.0065e-61.7098e-72.3087e-82.3137e-957.0133
MGRO GUHHE4.4643e-76.9831e-83.5253e-81.8792e-81.6121e-88.3047e-71.7317e-72.1433e-81.5036e-957.0133
IMI GUHHZ4.9281e-76.7525e-83.5715e-82.6831e-81.7001e-89.6363e-71.7695e-71.9466e-82.0615e-971.7138
IMI GUHHN1.6143e-62.2850e-71.0210e-74.7027e-83.1349e-82.4010e-63.7129e-74.2081e-83.9607e-971.7138
IMI GUHHE8.2325e-71.2221e-76.9788e-83.6399e-82.9412e-82.1301e-63.2511e-73.5283e-83.8122e-971.7138
*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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