AUTOMATIC Location - Area: Alpi Cozie , magnitude (ML): 1.4
2025-12-20 04:27:38 (UTC)

Regional Seismic Network of Northwestern Italy (Distav, University of Genoa)
Posted on: 2025-12-20 04:32:20

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Earthquake info - RsniPicker2 automatic location
Event - ID :251220042714
Magnitude (ML) :1.4 +/- 0.3
Origin Time :2025-12-20 04:27:38.189 (UTC)
Location : Latitude: 44.664 N, Longitude: 6.840 E
Area :Alpi Cozie
Depth (km) :14.35
Distances (km) : 15.6 --- Pontechianale (CN)
16.7 --- Bellino (CN)
20.0 --- Casteldelfino (CN)
24.1 --- Acceglio (CN)
24.1 --- Elva (CN)
25.5 --- Crissolo (CN)
26.3 --- Prazzo (CN)
27.3 --- Bobbio Pellice (TO)
27.8 --- Oncino (CN)
27.8 --- Ostana (CN)
28.7 --- Stroppo (CN)
29.3 --- Sampeyre (CN)
29.8 --- Villar Pellice (TO)
30.0 --- Canosio (CN)
30.1 --- Prali (TO)
30.4 --- Marmora (CN)
30.7 --- Argentera (CN)
30.8 --- Sauze di Cesana (TO)
31.5 --- Claviere (TO)
31.9 --- Rora (TO)

Quality location estimate:
Erh: 1 km, Erz: 0.9 km, Nf: 30, Gap: 113°, Rms: 0.315 s
Stazioni validate: 19


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.
SURFFR2025-12-20 04:27:43.1500.01100.001.852025-12-20 04:27:46.0290.0751-0.720.2925.0
OGAGFR2025-12-20 04:27:44.6890.02000.510.902025-12-20 04:27:48.4190.09310.001.5731.0
PZZGU2025-12-20 04:27:43.8890.0130-0.360.592025-12-20 04:27:47.2590.0941-1.330.1231.5
RRLGU2025-12-20 04:27:44.5700.04800.021.772025-12-20 04:27:49.0000.09710.011.5432.2
BHBGU2025-12-20 04:27:45.9300.0180-0.031.722025-12-20 04:27:50.2900.1232-1.030.2241.0
ISOFR2025-12-20 04:27:49.2790.02800.580.882025-12-20 04:27:55.8270.1822-0.041.2957.7
STVGU--:---.-----.---.--2025-12-20 04:27:56.6460.2342-0.081.2062.1
OGMOFR--:---.-----.---.--2025-12-20 04:27:58.1260.53430.120.9463.4
RSPGU2025-12-20 04:27:50.5600.03100.650.752025-12-20 04:27:57.8520.2902-0.221.0365.0
ENRGU2025-12-20 04:27:50.2000.03300.141.352025-12-20 04:27:58.4000.20520.091.2568.2
TURFFR2025-12-20 04:27:54.7790.04400.630.762025-12-20 04:28:05.0600.2682-0.300.9389.5
MVIFFR--:---.-----.---.--2025-12-20 04:28:05.4620.6233-0.520.6990.1
LSDGU--:---.-----.---.--2025-12-20 04:28:05.9500.28220.091.1292.5
GBOSGU2025-12-20 04:27:54.2000.04500.201.212025-12-20 04:28:05.0840.7313-0.080.7793.3
SAOFFR2025-12-20 04:27:55.5200.04600.530.872025-12-20 04:28:06.7100.2862-0.091.0895.4
MGROGU2025-12-20 04:27:56.1100.0511-0.091.35--:---.-----.---.-- 104.5
IMIGU--:---.-----.---.--2025-12-20 04:28:12.5500.3932-0.070.97119.4
CIROGU--:---.-----.---.--2025-12-20 04:28:12.2300.5663-1.180.34119.8
PCPGU2025-12-20 04:28:01.1700.06610.690.65--:---.-----.---.-- 136.4


RsniPicker2 - Automatic magnitude (ML) calculation results
Station Net Stat. Mag. Wood-And.
Ampl.
Dist. (km) Azimuth Used
PZZ GU1.404.37e-131.5129SI
RRL GU1.201.30e-132.2352SI
BHB GU1.108.64e-241.060SI
ISO FR1.003.77e-257.7163SI
STV GU1.404.95e-262.1140SI
RSP GU1.103.75e-265.032SI
ENR GU1.802.26e-168.2136SI
LSD GU1.302.36e-292.515SI
GBOS GU2.005.72e-293.3120SI
SAOF FR1.302.09e-295.4143SI
MGRO GU1.603.49e-2104.5132SI
IMI GU1.603.63e-2119.4135SI
CIRO GU1.306.64e-3119.829SI
PCP GU1.401.15e-2136.495SI


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 GUHHZ4.2238e-57.0249e-60.0000e+04.9737e-68.6503e-61.2017e-57.2905e-52.1588e-58.3955e-71.4299e-731.5129
PZZ GUHHN6.4621e-58.6212e-60.0000e+05.3460e-69.4170e-69.4170e-61.2252e-41.0735e-58.5383e-71.8939e-731.5129
PZZ GUHHE4.8962e-58.2473e-60.0000e+05.5434e-69.4902e-61.3477e-51.0394e-42.1166e-51.0216e-61.7545e-731.5129
RRL GUHHZ9.5977e-61.1303e-60.0000e+06.2628e-71.2130e-61.7301e-61.6760e-52.3582e-61.7182e-72.6594e-832.2352
RRL GUHHN1.0719e-51.8626e-60.0000e+01.3384e-62.2979e-62.2979e-62.3287e-53.5737e-63.7099e-75.1414e-832.2352
RRL GUHHE9.4484e-61.6269e-60.0000e+01.2161e-62.0989e-62.9433e-63.0508e-53.6587e-63.1027e-74.7821e-832.2352
BHB GUHHZ2.1744e-52.1780e-60.0000e+01.2467e-62.2739e-63.2501e-64.1990e-52.3781e-61.5266e-74.4799e-841.060
BHB GUHHN1.6039e-51.9301e-60.0000e+09.2464e-71.5855e-61.5855e-62.2584e-52.3610e-61.8771e-73.2821e-841.060
BHB GUHHE1.7465e-52.2158e-60.0000e+01.0879e-62.1734e-63.2158e-63.8458e-52.2286e-61.7244e-74.3480e-841.060
ISO FRHHZ3.3976e-63.8412e-70.0000e+03.1985e-75.3574e-77.2553e-76.5031e-61.4420e-68.3160e-81.0754e-857.7163
ISO FRHHN3.4433e-64.6120e-70.0000e+02.8226e-75.2775e-75.2775e-74.3262e-61.1034e-66.3542e-89.2728e-957.7163
ISO FRHHE4.4113e-65.0665e-70.0000e+03.4402e-76.8767e-79.3846e-78.1416e-61.4149e-61.2195e-71.2157e-857.7163
STV GUHHZ4.1571e-66.9242e-70.0000e+04.1202e-77.4907e-71.0848e-68.4582e-61.4856e-61.0075e-71.4236e-862.1140
STV GUHHN5.6976e-67.2461e-70.0000e+04.5139e-78.2810e-78.2810e-71.2951e-51.1717e-69.9337e-81.6404e-862.1140
STV GUHHE6.8754e-69.3192e-70.0000e+06.0081e-71.0765e-61.5220e-61.8424e-51.3550e-61.0367e-72.1150e-862.1140
RSP GUHHZ4.6169e-64.9941e-70.0000e+02.8433e-75.2639e-77.5839e-71.1609e-57.3791e-77.4993e-81.1554e-865.032
RSP GUHHN4.2005e-66.8013e-70.0000e+04.2384e-77.3405e-77.3405e-71.7193e-59.8133e-77.9019e-81.7981e-865.032
RSP GUHHE5.1102e-66.9457e-70.0000e+04.3736e-77.6675e-71.0964e-61.6609e-59.9084e-78.5480e-81.8255e-865.032
ENR GUHHZ2.0619e-52.2384e-60.0000e+01.2985e-62.3512e-63.3456e-62.8794e-54.1267e-62.5979e-75.0598e-868.2136
ENR GUHHN4.8807e-55.3533e-60.0000e+02.2698e-64.4135e-64.4135e-65.6819e-55.8534e-64.2618e-71.1149e-768.2136
ENR GUHHE3.6387e-54.5626e-60.0000e+02.2838e-64.4640e-66.6373e-65.0018e-56.9156e-64.8109e-79.4013e-868.2136
LSD GUHHZ1.3604e-62.0276e-70.0000e+01.6763e-72.7939e-73.7249e-73.5834e-68.2410e-73.9321e-87.5092e-992.515
LSD GUHHN1.7867e-62.6330e-70.0000e+01.9266e-73.3515e-73.3515e-75.1737e-67.5855e-73.9530e-87.8091e-992.515
LSD GUHHE1.9832e-63.1489e-70.0000e+02.7792e-74.4741e-75.9825e-74.7343e-61.5688e-65.5578e-86.4014e-992.515
GBOS GUHHZ3.5320e-67.1212e-70.0000e+06.8876e-71.1210e-61.5474e-61.5540e-53.6617e-62.1456e-72.6180e-893.3120
GBOS GUHHN4.0699e-69.4089e-70.0000e+06.6815e-71.1365e-61.1365e-61.4259e-52.0235e-62.0861e-72.0527e-893.3120
GBOS GUHHE4.9820e-68.2379e-70.0000e+07.1413e-71.1120e-61.5353e-61.6284e-52.2769e-61.4864e-72.0148e-893.3120
SAOF FRHHE4.9820e-68.2379e-70.0000e+07.1413e-71.1120e-61.5353e-61.6284e-52.2769e-61.4864e-72.0148e-895.4143
MGRO GUHHZ5.2699e-71.3681e-70.0000e+01.0858e-72.4834e-73.3650e-71.5756e-67.9631e-71.0028e-79.8994e-9104.5132
MGRO GUHHN1.0931e-62.9395e-70.0000e+01.7826e-73.8996e-73.8996e-72.5326e-68.2835e-71.5018e-71.2553e-8104.5132
MGRO GUHHE6.9182e-71.6671e-70.0000e+01.2840e-72.6589e-73.8768e-72.7571e-64.6589e-78.6606e-87.6977e-9104.5132
IMI GUHHZ8.8905e-71.3314e-70.0000e+01.2032e-72.2236e-73.2747e-72.3629e-66.2629e-71.1333e-71.0178e-8119.4135
IMI GUHHN1.9332e-62.7578e-70.0000e+02.4247e-74.6468e-74.6468e-75.1160e-61.2445e-61.1292e-71.3258e-8119.4135
IMI GUHHE1.4971e-62.7080e-70.0000e+02.0350e-73.5389e-74.8542e-73.7715e-68.3294e-71.2680e-71.0280e-8119.4135
CIRO GUHHZ4.9343e-77.4215e-80.0000e+07.1174e-81.2109e-71.6707e-71.2843e-63.4352e-72.2104e-83.5000e-9119.829
CIRO GUHHN6.3856e-79.1378e-80.0000e+06.7856e-81.2054e-71.2054e-71.6135e-62.9329e-72.9403e-85.1251e-9119.829
CIRO GUHHE6.1079e-78.6900e-80.0000e+07.3627e-81.2441e-71.8026e-71.2295e-62.6779e-73.0220e-86.3390e-9119.829
PCP GUHHZ3.4428e-79.0725e-80.0000e+09.9609e-81.6925e-72.2400e-79.8643e-75.3640e-76.0761e-87.1971e-9136.495
PCP GUHHN4.9327e-78.6562e-80.0000e+07.6081e-81.4423e-71.4423e-71.2675e-64.0389e-76.9046e-85.6880e-9136.495
PCP GUHHE4.3489e-71.1249e-70.0000e+01.0636e-71.8293e-72.5735e-78.4811e-75.9000e-76.4053e-85.8313e-9136.495
*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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