MANUAL Location - Area: Alpi Marittime , magnitude (ML): 1.7
2025-08-09 14:48:56 (UTC)

Regional Seismic Network of Northwestern Italy (Distav, University of Genoa)
Posted on: 2025-08-09 15:33:18

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Earthquake info - Manual location
Event - ID :250809144743
Magnitude (ML) :1.7 +/- 0.2
Origin Time :2025-08-09 14:48:56.07 (UTC)
Location : Latitude: 43.991 N, Longitude: 7.623 E
Area :Alpi Marittime
Depth (km) :8.02
Distances (km) : 7.0 --- Pigna
7.9 --- Castel Vittorio
11.1 --- Rocchetta Nervina
11.4 --- Triora
12.1 --- Molini di Triora
12.4 --- Baiardo
12.4 --- Isolabona
12.4 --- Apricale
14.0 --- Perinaldo
14.3 --- Airole
14.4 --- Briga Alta
14.9 --- Olivetta San Michele
15.4 --- Dolceacqua
17.0 --- Ceriana
17.4 --- Mendatica
17.7 --- Montegrosso Pian Latte
18.1 --- Soldano
18.9 --- Montalto Ligure
19.0 --- Seborga
19.1 --- San Biagio della Cima

Quality location estimate: Erh: 0.4 km, Erz: 0.5 km, Nf: 52, Gap: 49 °, Rms: 0.25


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.
MLIGIV2025-08-09 14:48:57.7450.0200-0.930.112025-08-09 14:48:58.6470.0400-2.020.009.4
SAOFFR2025-08-09 14:48:58.2000.0040-0.240.932025-08-09 14:48:59.1400.0260-1.090.1610.2
BRDIT2025-08-09 14:48:59.2110.0200-0.141.332025-08-09 14:49:01.4990.0400-0.260.9115.8
MGROGU2025-08-09 14:48:59.7300.0070-0.500.232025-08-09 14:49:02.2600.0511-1.060.2018.6
BIGNGU2025-08-09 14:48:59.8300.0090-0.001.982025-08-09 14:49:02.4900.0521-0.091.6518.7
TURFFR2025-08-09 14:49:00.5400.01000.091.732025-08-09 14:49:03.2590.1002-0.320.7720.2
SNRMIT2025-08-09 14:49:00.9370.02000.270.852025-08-09 14:49:04.6400.04000.650.3924.2
IMIGU2025-08-09 14:49:00.9000.0120-0.021.952025-08-09 14:49:04.5600.07220.091.6825.0
BURYGU2025-08-09 14:49:00.9700.0130-0.051.822025-08-09 14:49:04.7100.07520.161.4325.1
PVTIT2025-08-09 14:49:01.3640.02000.151.392025-08-09 14:49:06.3430.04001.340.0625.9
ESCAFR2025-08-09 14:49:02.1400.01900.440.562025-08-09 14:49:06.0170.08320.300.9628.0
ENRGU2025-08-09 14:49:02.2200.01600.021.952025-08-09 14:49:06.1300.0952-0.241.0632.5
GBOSGU2025-08-09 14:49:02.5800.01600.021.942025-08-09 14:49:07.0400.09920.081.6034.0
DNSPIT2025-08-09 14:49:03.3260.02000.530.542025-08-09 14:49:08.4910.04000.840.1537.3
STVGU2025-08-09 14:49:03.1600.01900.061.852025-08-09 14:49:07.6800.1123-0.171.3138.0
ROROGU2025-08-09 14:49:03.6300.04220.320.802025-08-09 14:49:08.5180.10020.121.5138.8
MVIFFR2025-08-09 14:49:04.6200.02110.630.422025-08-09 14:49:09.8000.12030.071.5239.9
VINDIV2025-08-09 14:49:05.4830.02000.121.592025-08-09 14:49:11.4870.0400-0.101.4951.0
ISOFR2025-08-09 14:49:06.0200.02610.530.562025-08-09 14:49:11.8400.1534-0.121.3351.3
EILFFR2025-08-09 14:49:09.4770.02001.830.072025-08-09 14:49:17.6570.04001.810.0863.6
QLNOIV2025-08-09 14:49:08.6000.0331-0.101.572025-08-09 14:49:18.0320.04000.500.6869.0
PZZGU2025-08-09 14:49:09.2400.03510.281.022025-08-09 14:49:17.4200.4829-0.420.7070.8
SURFFR2025-08-09 14:49:11.2800.04220.031.632025-08-09 14:49:21.6000.2547-0.101.0984.8
PCPGU2025-08-09 14:49:13.5800.05221.210.082025-08-09 14:49:26.1600.04002.330.0295.9
BHBGU2025-08-09 14:49:12.5900.0492-0.011.582025-08-09 14:49:24.0020.68290.030.7298.5


Local magnitude (ML) calculation results
Station Net Channels Stat. Mag. Wood-And.
Ampl.		 Dist. (km) Azimuth
SAOF FRHH1.835.91e+010.2266
BRD ITHN2.105.07e+015.8141
MGRO GUHH1.531.02e+018.669
BIGN GUEH1.771.77e+018.7145
TURF FRHH1.103.28e-120.2265
SNRM ITHN1.771.09e+024.2145
IMI GUHH1.609.42e-125.0112
BURY GUHH1.791.08e+025.1193
ENR GUHH1.687.05e-132.5328
GBOS GUHH1.561.82e-134.032
DNSP ITHN1.371.93e-137.3101
STV GUHH1.632.29e-138.0320
EILF FRHH1.962.54e-163.6219
QLNO IVHH1.811.49e-169.057
PZZ GUHH1.762.14e-170.8325
PCP GUHH1.889.11e-295.950
BHB GUHH1.897.32e-298.5343


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.
(°)
SAOF FRHHZ2.4017e-45.9918e-55.6353e-52.9196e-51.3426e-54.0674e-42.8311e-42.0318e-51.8319e-610.2266
SAOF FRHHN3.5573e-46.5926e-54.9428e-52.0591e-51.2045e-56.9212e-43.3282e-41.7898e-52.4616e-610.2266
SAOF FRHHE3.7931e-46.2699e-54.3911e-52.3414e-51.3104e-57.1619e-42.7865e-41.6741e-51.5784e-610.2266
BRD ITHNZ9.0407e-52.6744e-52.2695e-57.5023e-64.5117e-61.3906e-41.8686e-47.4627e-68.0185e-715.8141
BRD ITHNN1.3400e-43.4592e-53.3501e-51.3505e-55.8405e-62.4398e-42.8997e-48.0509e-69.4396e-715.8141
BRD ITHNE1.0623e-44.4405e-53.6743e-51.6225e-57.8832e-61.6453e-43.2948e-41.1063e-51.3091e-615.8141
MGRO GUHHZ1.1339e-53.6414e-63.4081e-62.6935e-62.2917e-62.6496e-51.9781e-52.3828e-61.7964e-718.669
MGRO GUHHN1.3752e-56.9819e-65.1330e-64.9835e-64.5430e-64.0612e-53.2381e-55.7791e-62.6606e-718.669
MGRO GUHHE1.4887e-56.3004e-64.9749e-63.9834e-62.0873e-64.1240e-52.8856e-52.3661e-61.8583e-718.669
BIGN GUEHZ3.2157e-55.9644e-64.3605e-61.8946e-61.4429e-61.0597e-41.7787e-52.4774e-61.8901e-718.7145
BIGN GUEHN1.1225e-42.5413e-51.4138e-55.1468e-62.5539e-62.4326e-47.5120e-53.6050e-66.1680e-718.7145
BIGN GUEHE1.1129e-41.4264e-59.6737e-63.7432e-61.8589e-61.4061e-44.8788e-52.6869e-64.1997e-718.7145
TURF FRHHZ3.5589e-54.3154e-62.3628e-61.4236e-61.1825e-67.2450e-51.2288e-51.8663e-61.1960e-720.2265
TURF FRHHN4.3522e-56.8008e-63.1387e-61.2591e-66.1665e-71.0549e-41.2943e-57.9630e-71.3672e-720.2265
TURF FRHHE2.9983e-54.4490e-62.6491e-61.2305e-61.1628e-64.9046e-51.2249e-51.7077e-61.2557e-720.2265
SNRM ITHNZ3.2308e-56.3782e-65.8616e-62.5372e-69.9263e-78.6154e-53.3478e-51.3293e-61.8954e-724.2145
SNRM ITHNN4.3225e-59.2650e-69.2590e-64.4525e-61.5740e-61.2978e-46.3928e-52.0224e-62.9147e-724.2145
SNRM ITHNE4.0010e-51.0769e-58.7958e-63.9659e-61.8106e-69.7632e-56.0332e-52.3763e-63.0179e-724.2145
IMI GUHHZ2.4307e-53.5241e-63.1543e-61.7559e-61.0825e-65.2838e-51.6974e-51.1934e-61.3169e-725.0112
IMI GUHHN8.3780e-51.2827e-59.0499e-63.4125e-61.7383e-61.0967e-43.6546e-52.1759e-63.7369e-725.0112
IMI GUHHE4.2789e-57.9282e-64.5203e-62.1372e-67.7353e-79.0099e-51.5494e-51.0049e-61.8474e-725.0112
BURY GUHHZ7.6935e-59.6639e-65.7521e-62.7098e-69.0592e-72.2384e-42.6602e-51.2894e-62.2954e-725.1193
BURY GUHHN1.3772e-41.8240e-57.4047e-62.4642e-61.0152e-63.4377e-44.2735e-51.6926e-64.0373e-725.1193
BURY GUHHE1.0944e-41.4226e-57.4285e-63.7208e-61.2236e-62.5241e-43.3751e-51.8214e-63.4276e-725.1193
PVT ITHNZ1.8870e-52.5162e-61.9443e-61.0391e-63.9617e-73.2137e-51.2992e-55.5700e-77.8696e-825.977
PVT ITHNN2.4085e-53.2730e-62.5188e-61.5514e-66.5959e-73.5621e-51.7731e-57.9563e-78.6331e-825.977
PVT ITHNE3.3331e-54.1417e-61.8663e-61.1018e-64.6524e-74.1168e-51.1198e-56.3483e-79.6443e-825.977
ESCA FRHHZ1.2556e-53.0002e-62.4517e-61.3376e-64.9345e-74.0436e-51.0527e-56.5539e-79.7870e-828.0228
ESCA FRHHN2.2005e-53.9067e-62.8806e-61.2237e-64.9027e-75.4741e-51.7541e-56.6577e-79.0000e-828.0228
ESCA FRHHE1.7001e-53.6337e-62.9206e-61.2426e-65.0210e-76.9218e-51.4827e-56.4389e-78.2460e-828.0228
ENR GUHHZ2.9549e-55.0837e-64.2051e-61.7442e-67.8761e-75.3775e-53.2304e-51.0654e-61.3353e-732.5328
ENR GUHHN6.1653e-58.1627e-65.8777e-62.6177e-61.1938e-61.3041e-42.9775e-51.5675e-62.1260e-732.5328
ENR GUHHE8.0172e-59.2835e-65.4079e-62.5857e-61.2715e-68.2358e-54.0775e-51.7418e-62.2783e-732.5328
GBOS GUHHZ5.7874e-61.7967e-61.6391e-69.4574e-73.8326e-71.7084e-51.0687e-54.8112e-75.1530e-834.032
GBOS GUHHN5.4400e-61.6271e-61.3588e-69.4544e-73.5836e-71.6210e-57.1706e-63.6639e-74.7125e-834.032
GBOS GUHHE6.7165e-61.9422e-61.5339e-67.7643e-73.1892e-71.6073e-58.9676e-63.8770e-75.2663e-834.032
DNSP ITHNZ8.2817e-61.4507e-61.0634e-66.9829e-75.5335e-72.9421e-56.2672e-66.1772e-74.8333e-837.3101
DNSP ITHNN1.1014e-51.7754e-61.5446e-68.6401e-72.8495e-73.0590e-57.6288e-63.3279e-75.1586e-837.3101
DNSP ITHNE1.4569e-52.3375e-61.7154e-69.5293e-73.6322e-74.0032e-58.8361e-65.8724e-77.6828e-837.3101
STV GUHHZ1.5059e-52.3249e-61.7994e-67.7212e-72.8670e-72.3976e-51.0998e-54.1083e-75.8786e-838.0320
STV GUHHN1.3922e-52.2805e-61.7927e-64.4438e-72.2466e-72.9519e-51.1811e-53.4755e-75.6857e-838.0320
STV GUHHE1.7659e-53.0890e-62.3291e-69.0065e-74.1877e-74.0838e-51.8000e-55.8329e-77.2050e-838.0320
RORO GUHHZ6.4582e-61.1097e-69.6221e-75.6071e-72.2109e-72.2420e-55.7758e-62.2467e-73.1574e-838.869
RORO GUHHN8.2957e-61.9300e-61.4858e-67.0460e-74.0895e-71.9223e-51.0835e-54.2080e-74.5794e-838.869
RORO GUHHE6.9486e-61.2462e-61.1544e-64.5324e-71.9881e-72.1972e-55.7206e-62.4953e-73.1616e-838.869
ISO FRHHZ3.4066e-65.9479e-73.9635e-71.4205e-76.1309e-81.1186e-52.0141e-69.1085e-81.5115e-851.3295
ISO FRHHN4.3467e-67.3845e-75.1302e-72.1643e-79.9486e-81.9046e-52.1551e-61.4343e-71.7939e-851.3295
ISO FRHHE3.5870e-66.6233e-73.7102e-71.4840e-76.2317e-81.6111e-51.5529e-68.0819e-81.4379e-851.3295
EILF FRHHZ2.4898e-52.7768e-61.3256e-64.0271e-71.8250e-73.8201e-56.6049e-62.6017e-76.2959e-863.6219
EILF FRHHN3.3752e-54.8678e-62.6371e-67.0898e-73.3812e-77.1138e-51.0104e-54.7006e-79.2402e-863.6219
EILF FRHHE2.2898e-53.1233e-62.0566e-67.3496e-73.3393e-77.2938e-56.9115e-64.7120e-77.4095e-863.6219
QLNO IVHHZ2.4298e-68.1389e-76.8139e-72.7016e-71.2994e-76.1818e-66.3511e-61.5229e-72.2498e-869.057
QLNO IVHHN4.2923e-61.0094e-68.4962e-72.9011e-71.4890e-71.4897e-55.9494e-62.1797e-72.4076e-869.057
QLNO IVHHE5.2615e-61.7435e-61.2116e-64.7731e-72.0391e-71.2027e-56.9115e-62.8492e-74.5172e-869.057
PZZ GUHHZ9.7711e-62.5004e-61.9807e-66.3804e-72.7183e-72.6293e-57.7366e-63.7933e-76.1307e-870.8325
PZZ GUHHN1.2495e-52.5610e-61.6132e-67.2989e-73.0353e-73.1988e-59.0635e-63.1625e-74.9940e-870.8325
PZZ GUHHE9.6717e-62.2435e-61.8535e-66.7396e-72.8315e-72.1957e-51.0861e-54.1823e-75.9365e-870.8325
PCP GUHHZ1.8994e-65.1036e-75.8731e-73.7791e-71.2425e-75.3139e-64.0605e-61.6978e-71.8523e-895.950
PCP GUHHN2.0739e-66.7101e-76.4180e-76.0650e-72.1143e-74.7155e-64.2586e-62.4178e-72.3949e-895.950
PCP GUHHE2.2147e-65.7108e-75.9696e-74.3290e-71.4241e-74.9650e-63.9443e-61.9286e-72.0174e-895.950
BHB GUHHZ2.0772e-63.7203e-73.3917e-71.2146e-75.0010e-87.1755e-61.6439e-67.2020e-89.2860e-998.5343
BHB GUHHN2.2829e-66.3614e-75.0542e-71.7280e-79.0828e-86.4528e-64.2488e-61.2324e-71.6820e-898.5343
BHB GUHHE2.7583e-66.4976e-75.8267e-72.9249e-71.5543e-78.2680e-63.7748e-62.1907e-72.1004e-898.5343
*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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