MANUAL Location - Area: Alpi Graie , magnitude (ML): -0.1
2025-08-11 04:25:20 (UTC)

Regional Seismic Network of Northwestern Italy (Distav, University of Genoa)
Posted on: 2025-08-11 09:30:32

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Earthquake info - Manual location
Event - ID :250811042411
Magnitude (ML) :-0.1 +/- 0.2
Origin Time :2025-08-11 04:25:20.711 (UTC)
Location : Latitude: 45.384 N, Longitude: 7.399 E
Area :Alpi Graie
Depth (km) :0.55
Distances (km) : 4.5 --- Cantoira
4.9 --- Chialamberto
6.2 --- Locana
7.7 --- Ceres
9.3 --- Groscavallo
9.6 --- Monastero di Lanzo
9.8 --- Mezzenile
9.8 --- Ribordone
10.2 --- Coassolo Torinese
10.4 --- Pessinetto
10.4 --- Ala di Stura
10.4 --- Noasca
12.0 --- Sparone
12.7 --- Traves
13.0 --- Corio
13.8 --- Lanzo Torinese
14.0 --- Ceresole Reale
14.4 --- Alpette
14.5 --- Germagnano
15.3 --- Forno Canavese

Quality location estimate: Erh: 1.2 km, Erz: 0.7 km, Nf: 12, Gap: 90 °, Rms: 0.17


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.
LATOIV2025-08-11 04:25:23.2300.0200-0.012.462025-08-11 04:25:24.2780.0400-0.610.3210.5
LSDGU2025-08-11 04:25:25.7400.01000.012.462025-08-11 04:25:28.1740.1695-0.830.2522.5
CANIGU2025-08-11 04:25:27.1320.02000.930.072025-08-11 04:25:30.3510.04000.700.0723.6
CIROGU2025-08-11 04:25:27.4000.0140-0.002.332025-08-11 04:25:31.4030.2837-0.360.7427.8
RSPGU2025-08-11 04:25:24.9930.0200-1.790.002025-08-11 04:25:27.5620.0400-3.130.0028.2
MRGEIV2025-08-11 04:25:30.8820.02000.021.922025-08-11 04:25:37.4240.0400-0.061.3850.4


Local magnitude (ML) calculation results
Station Net Channels Stat. Mag. Wood-And.
Ampl.
Dist. (km) Azimuth
LSD GUHH-0.408.54e-322.5292
CANI GUHH-0.378.35e-323.676
CIRO GUHH-0.037.23e-327.828
RSP GUHH-0.031.40e-228.2202
MRGE IVHH0.104.79e-350.4329


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.
(°)
LSD GUHHZ1.3230e-61.8717e-76.2992e-81.9220e-89.6056e-92.4740e-62.6735e-71.5965e-83.4613e-922.5292
LSD GUHHN1.3837e-61.6018e-76.5168e-82.4116e-81.5619e-81.8180e-62.7415e-72.5912e-84.0359e-922.5292
LSD GUHHE2.2097e-62.2921e-77.8626e-82.7287e-81.2297e-82.2542e-62.6159e-71.8399e-84.3751e-922.5292
CANI GUHHZ1.9323e-62.9522e-76.1597e-81.7167e-81.0481e-84.4989e-62.1730e-72.1348e-85.7905e-923.676
CANI GUHHN2.1006e-62.1895e-75.0604e-81.7080e-89.8946e-92.7800e-62.3642e-72.0158e-85.2887e-923.676
CANI GUHHE2.2842e-62.0434e-77.4094e-82.3496e-81.3778e-83.5642e-63.3057e-72.2714e-84.2709e-923.676
CIRO GUHHZ1.4447e-61.1918e-73.8696e-81.2450e-85.8479e-91.1758e-61.1916e-71.0201e-82.2908e-927.828
CIRO GUHHN2.2418e-61.6323e-73.2710e-81.0170e-85.5880e-92.2523e-61.4112e-71.1064e-83.4643e-927.828
CIRO GUHHE2.5416e-62.1102e-76.0734e-81.8099e-89.5342e-92.1436e-62.8741e-71.5622e-83.4846e-927.828
RSP GUHHZ1.5142e-61.5281e-75.3233e-82.0057e-89.7891e-92.0095e-62.2422e-71.7380e-82.9020e-928.2202
RSP GUHHN3.4395e-63.0994e-71.3344e-73.5437e-81.6269e-83.2432e-66.3749e-72.7334e-85.5806e-928.2202
RSP GUHHE1.9176e-62.0276e-71.0744e-72.8604e-81.4342e-82.2384e-65.4393e-72.2256e-84.2351e-928.2202
MRGE IVHHZ6.9649e-76.4882e-82.3453e-81.6613e-85.7167e-94.2067e-71.1937e-78.0078e-91.4671e-950.4329
MRGE IVHHN1.5482e-61.3278e-73.2070e-82.7687e-81.5259e-81.2340e-61.4489e-71.8645e-82.3113e-950.4329
MRGE IVHHE1.2508e-69.4800e-82.8356e-82.8096e-81.5240e-87.1915e-71.2327e-71.5908e-81.9089e-950.4329
*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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