AUTOMATIC Location - Area: Alpi Cozie , magnitude (ML): 0.9
2025-12-20 11:59:23 (UTC)

Regional Seismic Network of Northwestern Italy (Distav, University of Genoa)
Posted on: 2025-12-20 12:03:47

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Earthquake info - RsniPicker2 automatic location
Event - ID :251220115857
Magnitude (ML) :0.9 +/- 0.3
Origin Time :2025-12-20 11:59:23.45 (UTC)
Location : Latitude: 44.456 N, Longitude: 7.265 E
Area :Alpi Cozie
Depth (km) :11.69
Distances (km) : 3.0 --- Cartignano (CN)
3.8 --- San Damiano Macra (CN)
4.2 --- Pradleves (CN)
6.6 --- Roccabruna (CN)
6.6 --- Castelmagno (CN)
6.9 --- Monterosso Grana (CN)
7.4 --- Celle di Macra (CN)
7.9 --- Dronero (CN)
8.5 --- Macra (CN)
9.1 --- Montemale di Cuneo (CN)
9.7 --- Villar San Costanzo (CN)
10.4 --- Valgrana (CN)
11.8 --- Valmala (CN)
12.4 --- Stroppo (CN)
12.7 --- Melle (CN)
13.0 --- Frassino (CN)
13.6 --- Marmora (CN)
13.7 --- Caraglio (CN)
14.5 --- Canosio (CN)
14.9 --- Brossasco (CN)

Quality location estimate:
Erh: 1 km, Erz: 1.3 km, Nf: 21, Gap: 84°, Rms: 0.279 s
Stazioni validate: 13


RsniPicker2 - Automatic location results
Station Net P arrival times P pick
err		 P pick
weight		 P res Nll
weight		 S arrival time S pick
err		 S pick
weight		 S res Nll
weight		 Dist.
PZZGU2025-12-20 11:59:27.0900.0110-0.021.762025-12-20 11:59:29.2000.0531-0.540.9717.5
STVGU2025-12-20 11:59:28.4500.01500.041.512025-12-20 11:59:31.4590.0801-0.380.9926.6
ENRGU2025-12-20 11:59:29.0400.01700.011.692025-12-20 11:59:32.7090.0911-0.181.1630.3
ISOFR2025-12-20 11:59:30.7400.02400.530.032025-12-20 11:59:34.4190.1102-0.371.0536.7
SURFFR2025-12-20 11:59:30.5490.0250-0.041.612025-12-20 11:59:35.2700.1132-0.520.9737.8
BHBGU2025-12-20 11:59:31.1200.02300.021.542025-12-20 11:59:35.6790.2222-0.690.7443.7
GBOSGU2025-12-20 11:59:32.7200.0470-0.081.402025-12-20 11:59:38.7470.2402-0.530.9352.9
TURFFR--:---.-----.---.--2025-12-20 11:59:39.0090.5503-1.910.0755.7
SAOFFR--:---.-----.---.--2025-12-20 11:59:40.9420.3042-0.600.8358.2
MVIFFR--:---.-----.---.--2025-12-20 11:59:42.4300.6653-1.210.3763.9
MGROGU--:---.-----.---.--2025-12-20 11:59:42.4700.1932-0.740.6664.3
ROROGU--:---.-----.---.--2025-12-20 11:59:45.2400.2262-0.391.0275.3
IMIGU--:---.-----.---.--2025-12-20 11:59:46.4800.2392-0.550.8879.6
PCPGU--:---.-----.---.--2025-12-20 11:59:53.0900.4162-0.060.80102.7


RsniPicker2 - Automatic magnitude (ML) calculation results
Station Net Stat. Mag. Wood-And.
Ampl.		 Dist. (km) Azimuth Used
PZZ GU0.702.92e-117.5296SI
STV GU0.705.74e-226.6168SI
ENR GU1.102.26e-130.3154SI
ISO FR0.502.50e-236.7210SI
BHB GU0.501.59e-243.7360SI
GBOS GU1.607.68e-252.9117SI
SAOF FR0.601.43e-258.2156SI
MGRO GU1.002.80e-264.3137SI
RORO GU1.102.18e-275.3121SI
IMI GU1.103.07e-279.6140SI
PCP GU1.201.81e-2102.784SI


Results of PGA, PGV, IH, spectral amplitudes (SA) values calculation
Station Net Channel PGA
(g)		 PGV
(m/s)		 PGD
(m)		 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 GUHHZ4.1082e-54.4434e-60.0000e+01.7415e-63.0263e-64.2063e-65.1864e-55.5918e-63.1851e-75.6049e-817.5296
PZZ GUHHN9.7111e-59.3505e-60.0000e+01.9876e-63.4572e-63.4572e-68.7666e-58.0387e-63.1710e-77.3286e-817.5296
PZZ GUHHE5.9018e-57.6303e-60.0000e+02.1209e-64.0642e-65.9281e-66.4664e-55.4189e-63.4938e-76.7071e-817.5296
STV GUHHZ1.0067e-51.0733e-60.0000e+03.1117e-76.0435e-78.9258e-78.3994e-66.0184e-75.5943e-81.2755e-826.6168
STV GUHHN1.1045e-51.3484e-60.0000e+02.9881e-75.4598e-75.4598e-77.0676e-69.4335e-75.8186e-81.2697e-826.6168
STV GUHHE1.0934e-51.4218e-60.0000e+03.2612e-75.8313e-78.2225e-78.0784e-69.5148e-76.9253e-81.1804e-826.6168
ENR GUHHZ2.6235e-52.4363e-60.0000e+09.4321e-71.8629e-62.8297e-61.5959e-51.6296e-61.7872e-74.0555e-830.3154
ENR GUHHN6.9012e-56.5675e-60.0000e+02.2375e-64.6292e-64.6292e-64.3249e-53.0126e-64.0126e-71.1193e-730.3154
ENR GUHHE7.9605e-56.7937e-60.0000e+02.2610e-64.7424e-67.2800e-63.3851e-52.9127e-63.7925e-71.1106e-730.3154
ISO FRHHZ3.6773e-64.8926e-70.0000e+02.7408e-75.1079e-77.1576e-75.0065e-68.8262e-76.1135e-81.1070e-836.7210
ISO FRHHN4.5264e-65.7975e-70.0000e+02.4473e-74.8207e-74.8207e-75.2822e-66.2267e-74.8399e-81.1017e-836.7210
ISO FRHHE4.5770e-64.3606e-70.0000e+02.1341e-74.0043e-75.8456e-73.2898e-63.8734e-73.7989e-87.8175e-936.7210
BHB GUHHZ2.4896e-62.7037e-70.0000e+01.7381e-73.0856e-74.4141e-77.4650e-63.4690e-73.9758e-89.6858e-943.7360
BHB GUHHN2.7247e-63.1263e-70.0000e+01.8588e-73.4303e-73.4303e-76.6634e-64.0871e-75.5046e-87.4524e-943.7360
BHB GUHHE3.7009e-63.9284e-70.0000e+02.2000e-74.0041e-75.8939e-76.8446e-64.3589e-74.4770e-89.2166e-943.7360
GBOS GUHHZ5.8745e-69.3047e-70.0000e+07.0275e-71.1502e-61.5660e-62.2017e-52.1811e-61.9390e-72.6816e-852.9117
GBOS GUHHN5.2441e-69.3517e-70.0000e+06.8121e-71.2198e-61.2198e-62.1576e-52.2091e-62.2162e-72.4989e-852.9117
GBOS GUHHE7.4217e-61.3297e-60.0000e+09.9171e-71.6826e-62.3423e-62.9891e-53.7298e-61.4816e-73.2034e-852.9117
SAOF FRHHE7.4217e-61.3297e-60.0000e+09.9171e-71.6826e-62.3423e-62.9891e-53.7298e-61.4816e-73.2034e-858.2156
MGRO GUHHZ6.5044e-71.4725e-70.0000e+01.0848e-72.1951e-72.9333e-71.2821e-65.9246e-76.3391e-81.0522e-864.3137
MGRO GUHHN1.0219e-62.4198e-70.0000e+01.6111e-73.1822e-73.1822e-72.4879e-68.4066e-79.4285e-81.2406e-864.3137
MGRO GUHHE1.2246e-62.7706e-70.0000e+01.3704e-72.6006e-73.5212e-72.1348e-68.1656e-71.1605e-79.3117e-964.3137
RORO GUHHZ2.1380e-63.2742e-70.0000e+02.6419e-74.4128e-75.9478e-74.3301e-66.7806e-75.5665e-81.1242e-875.3121
RORO GUHHN1.4136e-62.5724e-70.0000e+02.1453e-73.3901e-73.3901e-74.4276e-68.7496e-77.7018e-87.0229e-975.3121
RORO GUHHE1.8072e-63.1791e-70.0000e+02.2843e-73.9223e-75.4728e-75.4567e-69.1570e-76.4831e-88.7494e-975.3121
IMI GUHHZ1.2263e-62.1136e-70.0000e+01.3993e-72.4612e-73.4408e-73.2631e-65.4776e-78.2215e-89.2545e-979.6140
IMI GUHHN3.8275e-64.3590e-70.0000e+03.1097e-75.3894e-75.3894e-79.4298e-68.7850e-71.3534e-71.2859e-879.6140
IMI GUHHE1.7104e-62.5172e-70.0000e+01.7456e-73.2147e-74.6132e-76.0696e-64.0793e-79.2681e-88.8142e-979.6140
PCP GUHHZ7.9957e-71.4568e-70.0000e+01.1930e-72.4168e-73.3868e-72.9113e-66.1691e-76.8586e-87.6055e-9102.784
PCP GUHHN9.6013e-71.4541e-70.0000e+01.1756e-72.1367e-72.1367e-72.9369e-65.8497e-71.0275e-76.7489e-9102.784
PCP GUHHE1.2849e-61.7760e-70.0000e+01.2293e-72.2206e-73.3363e-73.3354e-65.1768e-79.8953e-89.1128e-9102.784
*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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