MANUAL Location - Area: Alpi Cozie , magnitude (ML): 0.5
2025-07-04 02:27:24 (UTC)

Regional Seismic Network of Northwestern Italy (Distav, University of Genoa)
Posted on: 2025-07-04 07:31:29

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Earthquake info - Manual location
Event - ID :250704022657
Magnitude (ML) :0.5 +/- 0.2
Origin Time :2025-07-04 02:27:24.738 (UTC)
Location : Latitude: 44.507 N, Longitude: 7.159 E
Area :Alpi Cozie
Depth (km) :6.41
Distances (km) : 1.7 --- Macra
2.5 --- Stroppo
3.1 --- Celle di Macra
6.7 --- Elva
7.3 --- Marmora
7.9 --- San Damiano Macra
8.2 --- Canosio
8.4 --- Sampeyre
8.6 --- Prazzo
10.6 --- Cartignano
11.5 --- Castelmagno
11.7 --- Casteldelfino
11.8 --- Frassino
13.6 --- Pradleves
13.8 --- Acceglio
14.0 --- Bellino
14.2 --- Melle
14.9 --- Roccabruna
15.4 --- Valmala
16.6 --- Pontechianale

Quality location estimate: Erh: 0.8 km, Erz: 0.9 km, Nf: 18, Gap: 105 °, Rms: 0.20


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.
PZZGU2025-07-04 02:27:26.9300.00300.291.062025-07-04 02:27:27.9840.0701-0.041.338.5
VINDIV2025-07-04 02:27:29.2680.04010.021.362025-07-04 02:27:32.0120.0701-0.400.3922.8
SURFFR2025-07-04 02:27:30.6000.01300.211.222025-07-04 02:27:34.4900.0852-0.051.2528.3
STVGU2025-07-04 02:27:30.8710.10040.071.372025-07-04 02:27:34.7100.0992-0.300.6532.7
ISOFR2025-07-04 02:27:32.4400.02000.700.032025-07-04 02:27:36.8630.13030.350.7637.6
ENRGU2025-07-04 02:27:31.8800.02010.281.062025-07-04 02:27:36.2300.1143-0.131.0837.8
BHBGU2025-07-04 02:27:31.9300.01800.231.232025-07-04 02:27:36.4800.1143-0.011.2838.1
RRLGU2025-07-04 02:27:34.8300.0402-0.031.312025-07-04 02:27:41.7250.3117-0.320.7055.2
GBOSGU2025-07-04 02:27:35.6660.08030.011.342025-07-04 02:27:42.7600.2126-0.390.5962.0


Local magnitude (ML) calculation results
Station Net Channels Stat. Mag. Wood-And.
Ampl.
Dist. (km) Azimuth
PZZ GUHH0.213.34e-18.5271
STV GUHH0.271.32e-232.7155
ENR GUHH0.705.52e-237.8146
BHB GUHH0.592.80e-238.113
RRL GUHH0.284.86e-355.2328
GBOS GUHH0.717.61e-362.0118


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 GUHHZ8.4857e-57.1352e-62.9788e-68.3729e-74.3224e-76.4354e-51.1020e-57.5986e-71.4897e-78.5271
PZZ GUHHN6.7077e-56.7889e-62.6143e-69.9010e-75.1300e-77.1856e-51.0410e-57.5692e-71.3374e-78.5271
PZZ GUHHE4.9732e-55.3520e-62.6220e-66.3553e-73.4984e-78.9743e-51.2725e-55.6216e-71.2414e-78.5271
STV GUHHZ3.1339e-63.8738e-71.2865e-74.0170e-82.5599e-85.8793e-65.3740e-73.9662e-87.3694e-932.7155
STV GUHHN3.3427e-62.9263e-79.9778e-82.7775e-81.3887e-85.3301e-64.0388e-72.5850e-85.1385e-932.7155
STV GUHHE2.6132e-63.3335e-71.0454e-72.4624e-81.2176e-85.3641e-63.5677e-72.3918e-85.8654e-932.7155
ISO FRHHZ1.5102e-61.8256e-77.5519e-82.5166e-81.6769e-83.4540e-62.9879e-72.8773e-84.8589e-937.6194
ISO FRHHN1.4637e-61.3979e-75.3466e-81.2428e-87.0747e-92.5057e-61.6957e-71.2042e-82.5825e-937.6194
ISO FRHHE1.7537e-61.7716e-75.4576e-81.5520e-88.2865e-92.9787e-62.2430e-71.5667e-83.6428e-937.6194
ENR GUHHZ8.9792e-69.2405e-71.6539e-75.5816e-82.9274e-81.3906e-56.4864e-76.4169e-81.5728e-837.8146
ENR GUHHN1.9453e-51.4756e-63.3554e-71.1007e-75.6609e-82.4163e-51.1711e-61.1606e-73.2020e-837.8146
ENR GUHHE2.1201e-51.9787e-62.6521e-78.6955e-84.4775e-81.6936e-51.0957e-61.0380e-72.8545e-837.8146
BHB GUHHZ4.2499e-64.9018e-72.1485e-75.9253e-83.2856e-87.3147e-61.0044e-65.4444e-81.0603e-838.113
BHB GUHHN3.5346e-65.8113e-71.7323e-74.3463e-82.6380e-85.0217e-66.0363e-74.3382e-81.0840e-838.113
BHB GUHHE4.3592e-65.9405e-72.1472e-77.2954e-83.0619e-86.1005e-65.9856e-75.1503e-81.1766e-838.113
RRL GUHHZ5.1689e-75.9367e-82.5701e-81.7190e-81.4740e-81.1486e-61.1391e-72.5538e-83.8748e-955.2328
RRL GUHHN5.7896e-78.4591e-84.3231e-81.2049e-86.8833e-91.9518e-61.8881e-71.1126e-81.8813e-955.2328
RRL GUHHE5.3351e-78.7547e-83.9577e-81.3262e-86.4577e-91.4505e-62.1097e-78.6794e-91.7799e-955.2328
GBOS GUHHZ8.9315e-71.2371e-77.3785e-82.3791e-89.8097e-92.4772e-62.3623e-71.7641e-83.2409e-962.0118
GBOS GUHHN9.5053e-71.4357e-78.5520e-85.3937e-82.6567e-81.3935e-66.6124e-73.3686e-83.2297e-962.0118
GBOS GUHHE6.1545e-79.7751e-87.0370e-81.8639e-81.0197e-81.6567e-64.3230e-71.6128e-82.4759e-962.0118
*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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