MANUAL Location - Area: Alpi Cozie , magnitude (ML): 1.0
2025-12-09 19:54:24 (UTC)

Regional Seismic Network of Northwestern Italy (Distav, University of Genoa)
Posted on: 2025-12-10 07:49:30

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Earthquake info - Manual location
Event - ID :251209195349
Magnitude (ML) :1.0 +/- 0.2
Origin Time :2025-12-09 19:54:24.309 (UTC)
Location : Latitude: 44.503 N, Longitude: 6.882 E
Area :Alpi Cozie
Depth (km) :4.55
Distances (km) : 9.1 --- Acceglio
12.6 --- Argentera
13.8 --- Bellino
13.9 --- Prazzo
16.7 --- Canosio
16.9 --- Elva
17.5 --- Marmora
17.6 --- Pontechianale
17.8 --- Casteldelfino
19.4 --- Stroppo
21.3 --- Pietraporzio
23.5 --- Macra
23.7 --- Celle di Macra
23.8 --- Sambuco
25.8 --- Sampeyre
28.1 --- Castelmagno
29.6 --- San Damiano Macra
30.9 --- Crissolo
31.1 --- Oncino
31.7 --- Vinadio

Quality location estimate: Erh: 0.8 km, Erz: 1.3 km, Nf: 42, Gap: 74 °, Rms: 0.40


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.
SURFFR2025-12-09 19:54:26.3300.0030-0.011.562025-12-09 19:54:27.0800.0400-0.800.077.6
PZZGU2025-12-09 19:54:28.9300.01000.380.972025-12-09 19:54:31.6400.05710.001.4619.5
VINDIV2025-12-09 19:54:30.7150.02000.021.542025-12-09 19:54:34.7480.0400-0.430.3432.0
ISOFR2025-12-09 19:54:32.4000.01900.701.082025-12-09 19:54:36.7960.10020.051.2938.3
OGAGFR2025-12-09 19:54:32.3230.0200-0.051.372025-12-09 19:54:38.1770.04000.091.3142.0
STVGU2025-12-09 19:54:33.1250.02000.351.002025-12-09 19:54:38.7300.13440.081.2445.8
RRLGU2025-12-09 19:54:33.4940.03810.061.422025-12-09 19:54:40.8300.14640.960.4547.5
BHBGU2025-12-09 19:54:34.0500.02410.750.972025-12-09 19:54:39.5310.1002-0.081.1247.9
ENRGU2025-12-09 19:54:34.6130.02000.661.082025-12-09 19:54:40.7200.23760.071.1252.7
OGDIFR2025-12-09 19:54:37.9060.02000.730.972025-12-09 19:54:47.1030.04000.601.0168.4
MVIFFR2025-12-09 19:54:38.0120.02000.371.052025-12-09 19:54:46.9300.2607-0.310.7070.9
TURFFR2025-12-09 19:54:38.3060.02000.760.912025-12-09 19:54:46.9170.04000.031.1771.5
RSPGU2025-12-09 19:54:38.9600.03910.521.062025-12-09 19:54:48.2100.4369-0.220.7578.0
SAOFFR2025-12-09 19:54:39.4620.02000.740.932025-12-09 19:54:48.7320.1002-0.061.0578.6
OGMOFR2025-12-09 19:54:36.8020.0200-2.200.002025-12-09 19:54:49.2020.0400-0.250.7880.0
GBOSGU2025-12-09 19:54:39.2980.02000.521.062025-12-09 19:54:49.2020.10020.421.1081.6
MLIGIV2025-12-09 19:54:40.1690.02000.131.262025-12-09 19:54:50.8190.0400-0.220.8385.8
MGROGU2025-12-09 19:54:40.7050.02000.091.282025-12-09 19:54:51.9200.2857-0.160.8590.0
ROROGU2025-12-09 19:54:43.0600.05220.561.052025-12-09 19:54:55.3800.40180.230.95103.8
IMIGU2025-12-09 19:54:43.2700.05220.641.002025-12-09 19:54:55.9300.31070.460.96104.2
LSDGU2025-12-09 19:54:44.1360.02000.670.972025-12-09 19:54:56.7850.0400-0.110.94108.3


Local magnitude (ML) calculation results
Station Net Channels Stat. Mag. Wood-And.
Ampl.
Dist. (km) Azimuth
PZZ GUHH1.156.61e-119.589
ISO FRHH0.754.33e-238.3159
OGAG FRHH0.703.26e-242.0320
STV GUHH0.802.36e-245.8129
RRL GUHH0.882.63e-247.5351
BHB GUHH1.014.64e-247.939
ENR GUHH1.086.80e-252.7125
TURF FRHH0.721.12e-271.5145
RSP GUHH1.092.31e-278.023
SAOF FRHH0.851.23e-278.6137
MGRO GUHH0.859.10e-390.0124
RORO GUHH1.321.93e-2103.8114
IMI GUHH1.151.73e-2104.2129
LSD GUHH1.221.35e-2108.310


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 GUHHZ2.9528e-56.7045e-64.7559e-61.4582e-66.5805e-78.9138e-51.4910e-59.2892e-71.5907e-719.589
PZZ GUHHN3.6987e-59.4834e-65.8363e-61.6738e-68.6754e-71.2624e-42.5766e-51.3175e-62.0560e-719.589
PZZ GUHHE3.9803e-59.0322e-66.4808e-61.9222e-69.4677e-71.3254e-42.7332e-51.4078e-62.3700e-719.589
ISO FRHHZ2.3541e-63.3394e-71.6635e-75.9001e-83.0034e-84.5368e-66.7071e-74.0962e-87.8303e-938.3159
ISO FRHHN2.6088e-64.0549e-71.7413e-76.4297e-82.9827e-84.9808e-68.3573e-74.7416e-89.5588e-938.3159
ISO FRHHE3.2363e-66.4394e-73.3049e-71.2410e-75.9573e-86.9822e-62.1164e-69.5335e-81.7142e-838.3159
OGAG FRHHZ1.0755e-62.7106e-72.2956e-71.1486e-75.0979e-82.4359e-61.1450e-66.2478e-87.2950e-942.0320
OGAG FRHHN1.0193e-62.3174e-71.8544e-78.4259e-84.2451e-83.0334e-66.8168e-75.8422e-86.8972e-942.0320
OGAG FRHHE9.1056e-72.6756e-72.8108e-71.5108e-77.4734e-82.0887e-62.4448e-67.5473e-88.3658e-942.0320
STV GUHHZ1.9667e-63.5987e-72.5900e-71.2497e-75.5907e-85.7695e-61.6816e-67.6347e-89.9323e-945.8129
STV GUHHN2.3431e-62.9916e-71.9972e-77.3991e-84.3265e-86.4604e-61.1304e-65.5885e-87.6554e-945.8129
STV GUHHE2.1012e-63.8039e-71.9123e-77.9963e-84.2933e-86.2855e-61.3437e-65.4927e-87.9802e-945.8129
RRL GUHHZ9.7261e-71.7763e-71.2645e-75.2576e-82.4835e-83.4054e-66.8797e-72.9102e-84.1114e-947.5351
RRL GUHHN9.0700e-71.9122e-71.7333e-78.0321e-83.3287e-84.6650e-67.6755e-74.3140e-85.2122e-947.5351
RRL GUHHE1.4729e-63.7328e-72.7259e-71.0276e-74.0514e-85.5468e-61.2414e-64.9206e-89.7579e-947.5351
BHB GUHHZ4.1516e-66.0774e-74.2109e-71.2935e-76.4530e-81.7143e-52.1928e-69.5205e-81.7367e-847.939
BHB GUHHN2.7635e-64.9734e-74.1754e-71.1031e-75.5360e-88.1423e-62.0585e-68.2495e-81.4649e-847.939
BHB GUHHE2.7130e-65.0053e-73.2061e-71.0892e-74.9021e-88.9961e-69.8285e-78.0228e-81.3786e-847.939
ENR GUHHZ4.6008e-66.1835e-73.0577e-71.4986e-78.5106e-81.1795e-51.1928e-69.3555e-81.5447e-852.7125
ENR GUHHN1.1783e-51.2980e-65.1163e-72.0100e-71.1572e-72.5522e-53.5363e-61.6090e-72.6552e-852.7125
ENR GUHHE1.2095e-51.2453e-65.4189e-71.5298e-76.8766e-81.6491e-53.0381e-61.1709e-72.6033e-852.7125
TURF FRHHZ5.4792e-71.1890e-78.2047e-82.9326e-81.5428e-82.7220e-64.5206e-72.2153e-82.4598e-971.5145
TURF FRHHN8.8601e-71.6747e-71.0651e-73.4092e-81.6662e-83.0727e-64.4782e-72.6513e-84.6274e-971.5145
TURF FRHHE7.2345e-71.2098e-71.0805e-74.9119e-81.8661e-82.2231e-64.9585e-72.7113e-83.5187e-971.5145
RSP GUHHZ9.8656e-71.8671e-71.2351e-75.4959e-81.9592e-82.4329e-67.0321e-72.3203e-84.1409e-978.023
RSP GUHHN1.3719e-63.0870e-72.2423e-77.1308e-83.6052e-85.1705e-68.5714e-74.8702e-88.1730e-978.023
RSP GUHHE1.9280e-62.9346e-72.2165e-76.8023e-83.0521e-88.2275e-61.1175e-64.5100e-88.7034e-978.023
SAOF FRHHZ4.9477e-71.5077e-71.5109e-76.2188e-82.5843e-88.7522e-71.1927e-63.4668e-84.1884e-978.6137
SAOF FRHHN4.4352e-71.1017e-79.2304e-84.4877e-81.7270e-81.0257e-66.4832e-72.0577e-83.1154e-978.6137
SAOF FRHHE4.3576e-71.0647e-71.1445e-74.9325e-82.3325e-81.2532e-68.3617e-73.4948e-83.4915e-978.6137
GBOS GUHHZ1.4451e-63.2222e-72.8083e-77.9936e-83.1901e-85.5641e-61.8857e-64.3859e-87.9419e-981.6111
GBOS GUHHN1.6504e-63.7722e-72.6925e-71.0138e-74.4500e-84.0132e-69.2681e-76.1306e-88.2837e-981.6111
GBOS GUHHE1.3665e-64.0380e-72.8346e-71.0038e-75.1323e-83.5836e-61.5562e-67.1901e-89.5815e-981.6111
MGRO GUHHZ3.2703e-76.0377e-85.7901e-82.9120e-81.1653e-86.9990e-72.2332e-71.4385e-82.4785e-990.0124
MGRO GUHHN4.3396e-71.1601e-78.3100e-84.2161e-81.9190e-81.3761e-65.0582e-72.4690e-82.6693e-990.0124
MGRO GUHHE5.7335e-71.1484e-78.7919e-83.8470e-81.6496e-81.7596e-64.2120e-72.0743e-83.4504e-990.0124
RORO GUHHZ7.1747e-71.8620e-71.8146e-75.8531e-82.7413e-81.9754e-61.3320e-63.7817e-84.8119e-9103.8114
RORO GUHHN8.5431e-72.4067e-71.6671e-74.8504e-82.5030e-81.7955e-61.2978e-63.9171e-85.6562e-9103.8114
RORO GUHHE7.9410e-71.7784e-71.2952e-73.9519e-82.1574e-82.2719e-65.6973e-72.7958e-84.2139e-9103.8114
IMI GUHHZ5.4788e-79.8816e-87.1208e-83.1940e-81.4621e-82.2794e-63.8866e-72.0624e-82.9279e-9104.2129
IMI GUHHN1.3523e-62.3822e-71.6242e-75.4457e-82.5973e-83.8495e-68.4620e-73.8758e-86.2573e-9104.2129
IMI GUHHE1.1367e-61.7865e-71.1105e-73.8441e-81.9120e-82.0135e-66.0691e-73.4912e-84.5838e-9104.2129
LSD GUHHZ4.3397e-71.0456e-79.8430e-83.3693e-81.6799e-81.1704e-65.7277e-72.4179e-83.2578e-9108.310
LSD GUHHN5.2532e-71.5233e-71.2313e-74.5387e-81.8621e-81.7157e-66.6635e-72.8178e-83.9799e-9108.310
LSD GUHHE5.5443e-71.4425e-71.4171e-75.0834e-82.1247e-81.4821e-68.6291e-72.9696e-83.9043e-9108.310
*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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