MANUAL Location - Area: Riviera di ponente , magnitude (ML): 0.4
2025-07-30 07:44:06 (UTC)

Regional Seismic Network of Northwestern Italy (Distav, University of Genoa)
Posted on: 2025-07-30 08:52:52

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Earthquake info - Manual location
Event - ID :250730074324
Magnitude (ML) :0.4 +/- 0.2
Origin Time :2025-07-30 07:44:06.278 (UTC)
Location : Latitude: 43.933 N, Longitude: 7.701 E
Area :Riviera di ponente
Depth (km) :3.80
Distances (km) : 2.2 --- Castel Vittorio
3.1 --- Pigna
3.5 --- Baiardo
6.6 --- Apricale
7.6 --- Perinaldo
7.7 --- Isolabona
8.1 --- Ceriana
8.5 --- Triora
8.7 --- Molini di Triora
9.2 --- Rocchetta Nervina
10.9 --- Dolceacqua
11.4 --- Montalto Ligure
11.7 --- Seborga
11.8 --- Badalucco
12.1 --- Soldano
13.3 --- San Biagio della Cima
13.5 --- Vallebona
13.5 --- Carpasio
13.6 --- Airole
13.9 --- San Remo

Quality location estimate: Erh: 0.4 km, Erz: 0.3 km, Nf: 26, Gap: 58 °, Rms: 0.14


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.
BRDIT2025-07-30 07:44:07.8060.0200-0.031.682025-07-30 07:44:08.4250.0400-0.570.116.3
MLIGIV2025-07-30 07:44:08.6100.02000.001.732025-07-30 07:44:09.9380.0400-0.450.297.4
BIGNGU2025-07-30 07:44:08.3580.07830.021.602025-07-30 07:44:09.5050.0400-0.390.339.0
SAOFFR2025-07-30 07:44:09.9850.02000.410.152025-07-30 07:44:12.0900.04110.021.6813.9
MGROGU2025-07-30 07:44:10.1100.01000.091.422025-07-30 07:44:12.8000.0441-0.101.2615.8
IMIGU2025-07-30 07:44:09.9300.01100.270.612025-07-30 07:44:12.2870.05310.071.5316.2
BURYGU2025-07-30 07:44:10.4070.0200-0.081.382025-07-30 07:44:13.2500.0651-0.250.5620.7
TURFFR2025-07-30 07:44:11.8990.02000.101.412025-07-30 07:44:15.7800.0762-0.061.3525.5
ESCAFR2025-07-30 07:44:12.5200.02000.220.802025-07-30 07:44:16.7560.04000.101.4028.9
ROROGU2025-07-30 07:44:13.4860.02000.280.622025-07-30 07:44:18.0500.1053-0.170.9635.5
GBOSGU2025-07-30 07:44:15.5970.02002.090.002025-07-30 07:44:18.6120.10020.071.3136.3
ENRGU2025-07-30 07:44:14.0330.0200-0.021.612025-07-30 07:44:19.5100.11830.071.2640.3
STVGU2025-07-30 07:44:16.0850.02001.080.002025-07-30 07:44:20.8150.0400-0.170.9646.1


Local magnitude (ML) calculation results
Station Net Channels Stat. Mag. Wood-And.
Ampl.
Dist. (km) Azimuth
BRD ITHN0.771.19e+06.3151
BIGN GUEH0.141.51e-19.0157
SAOF FRHH0.258.93e-213.9297
MGRO GUHH0.521.32e-115.835
IMI GUHH0.441.42e-116.299
BURY GUHH0.385.95e-220.7215
GBOS GUHH0.441.23e-236.318
ENR GUHH0.674.57e-240.3326
STV GUHH0.419.27e-346.1319


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.
(°)
BRD ITHNZ1.3131e-49.0593e-63.2884e-69.1138e-74.2797e-71.1447e-41.2411e-57.8603e-71.6799e-76.3151
BRD ITHNN9.7606e-51.5346e-58.2071e-63.4540e-61.6493e-61.5668e-45.7088e-52.5383e-63.9287e-76.3151
BRD ITHNE6.6189e-57.2859e-65.2690e-61.6016e-68.2140e-76.7208e-52.8843e-51.2202e-61.5917e-76.3151
BIGN GUEHZ2.8375e-53.5706e-65.1906e-72.6439e-71.2765e-72.0470e-52.4252e-61.6687e-72.6380e-89.0157
BIGN GUEHN6.0199e-55.3211e-61.0646e-64.3921e-72.1618e-73.4070e-54.2566e-63.3424e-76.9093e-89.0157
BIGN GUEHE4.0595e-53.0741e-68.7138e-73.0694e-71.4542e-72.4572e-53.3671e-62.7952e-75.6755e-89.0157
SAOF FRHHZ6.5637e-68.7167e-74.7403e-71.4853e-77.1243e-81.9047e-52.4047e-61.1678e-72.1835e-813.9297
SAOF FRHHN1.1527e-51.4756e-66.2511e-72.1248e-71.1351e-72.2476e-52.5865e-61.7502e-73.4539e-813.9297
SAOF FRHHE1.3792e-52.2196e-66.5386e-73.1335e-71.3333e-72.9613e-52.4171e-62.1663e-74.1055e-813.9297
MGRO GUHHZ4.1901e-68.4056e-73.6835e-78.5421e-85.0422e-87.6303e-61.5445e-67.9825e-81.6698e-815.835
MGRO GUHHN5.3539e-67.0059e-73.2121e-71.3610e-77.6407e-81.3852e-51.5042e-61.1682e-71.5885e-815.835
MGRO GUHHE7.0635e-61.6352e-61.0673e-63.0929e-71.6114e-71.2211e-55.3633e-62.5063e-73.9052e-815.835
IMI GUHHZ3.9595e-66.9898e-73.4653e-71.1154e-75.3261e-81.0113e-52.0509e-68.4100e-81.8039e-816.299
IMI GUHHN1.4584e-51.9917e-61.1875e-63.5628e-71.8458e-73.1912e-54.6226e-63.0056e-75.3652e-816.299
IMI GUHHE4.9971e-66.5185e-72.7752e-71.0375e-74.9017e-88.4132e-61.1436e-66.5833e-81.4450e-816.299
BURY GUHHZ1.0043e-51.1646e-63.1288e-79.8641e-86.0655e-81.3941e-59.9972e-71.0503e-72.2219e-820.7215
BURY GUHHN9.8337e-61.2765e-64.6365e-71.2065e-76.2666e-81.6666e-51.9891e-61.0473e-72.7085e-820.7215
BURY GUHHE1.3627e-51.5030e-64.7030e-71.3164e-77.6176e-81.7773e-51.5370e-61.4228e-73.2680e-820.7215
TURF FRHHZ7.1328e-71.0061e-75.4904e-82.4936e-81.7312e-81.3551e-62.8108e-72.7433e-82.4698e-925.5281
TURF FRHHN1.7602e-62.2404e-71.1234e-75.6709e-82.8590e-84.0553e-63.7361e-73.4411e-85.0629e-925.5281
TURF FRHHE1.1558e-62.0132e-71.1652e-73.8337e-82.0126e-83.4034e-64.2948e-72.6006e-84.7461e-925.5281
ESCA FRHHZ1.2963e-61.4836e-78.7854e-85.0273e-81.7751e-81.6478e-65.0368e-72.6617e-84.2046e-928.9247
ESCA FRHHN1.9544e-61.9395e-71.1484e-75.1979e-82.5123e-83.6100e-64.7829e-73.9314e-84.7479e-928.9247
ESCA FRHHE1.0486e-61.7035e-71.4344e-75.5962e-82.2191e-82.5518e-64.7802e-73.0571e-84.4352e-928.9247
RORO GUHHZ1.5161e-62.0070e-77.7045e-82.6588e-81.3333e-82.7427e-63.1291e-71.8875e-83.4801e-935.556
RORO GUHHN9.8020e-71.4872e-76.8445e-81.8293e-81.0926e-82.0405e-62.2791e-71.7079e-83.1191e-935.556
RORO GUHHE1.0528e-61.3283e-77.9368e-82.0973e-81.1450e-82.3202e-63.5004e-72.0358e-83.1599e-935.556
GBOS GUHHZ4.1412e-71.2355e-76.7730e-82.1683e-81.2822e-81.0326e-62.8925e-71.9753e-82.4745e-936.318
GBOS GUHHN4.1636e-77.2866e-84.4153e-83.6899e-83.3922e-81.0280e-62.2025e-74.5288e-84.2773e-936.318
GBOS GUHHE5.3732e-71.5261e-79.9538e-84.6134e-81.9072e-81.5869e-66.4416e-72.6668e-83.4532e-936.318
ENR GUHHZ2.3384e-64.3265e-71.8226e-76.6463e-86.4716e-89.9768e-67.8466e-79.9838e-81.1654e-840.3326
ENR GUHHN6.6445e-65.8694e-73.2827e-71.1888e-78.1454e-88.4948e-61.2822e-61.3812e-72.2551e-840.3326
ENR GUHHE4.7098e-64.7524e-72.1234e-77.3497e-84.4835e-88.9846e-61.0460e-66.9784e-81.1293e-840.3326
STV GUHHZ9.5493e-71.2917e-76.9774e-83.1031e-82.4188e-82.2499e-63.2150e-74.2786e-85.5928e-946.1319
STV GUHHN7.2786e-71.1793e-77.1974e-82.6051e-82.4833e-81.1813e-64.3575e-74.8595e-85.1897e-946.1319
STV GUHHE1.2702e-61.7946e-71.0093e-72.9705e-81.4259e-81.8437e-66.7740e-72.6017e-83.5376e-946.1319
*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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