MANUAL Location - Area: Alpi Marittime , magnitude (ML): 0.3
2025-07-29 18:46:35 (UTC)

Regional Seismic Network of Northwestern Italy (Distav, University of Genoa)
Posted on: 2025-07-30 08:07:33

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Earthquake info - Manual location
Event - ID :250729184501
Magnitude (ML) :0.3 +/- 0.2
Origin Time :2025-07-29 18:46:35.071 (UTC)
Location : Latitude: 44.051 N, Longitude: 7.633 E
Area :Alpi Marittime
Depth (km) :9.95
Distances (km) : 10.0 --- Briga Alta
12.4 --- Triora
13.1 --- Molini di Triora
13.2 --- Pigna
13.9 --- Castel Vittorio
14.0 --- Mendatica
14.8 --- Montegrosso Pian Latte
16.1 --- Cosio di Arroscia
17.3 --- Limone Piemonte
17.7 --- Baiardo
17.8 --- Rocchetta Nervina
18.9 --- Apricale
18.9 --- Pornassio
19.0 --- Isolabona
19.4 --- Rezzo
20.4 --- Perinaldo
20.8 --- Airole
21.1 --- Olivetta San Michele
21.1 --- Carpasio
21.6 --- Montalto Ligure

Quality location estimate: Erh: 0.3 km, Erz: 0.6 km, Nf: 28, Gap: 77 °, Rms: 0.21


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.
MLIGIV2025-07-29 18:46:37.3300.0200-0.790.142025-07-29 18:46:38.5120.0400-1.890.0012.8
SAOFFR2025-07-29 18:46:38.0500.00500.012.012025-07-29 18:46:40.7330.04000.510.1714.2
MGROGU2025-07-29 18:46:38.3800.0070-0.650.232025-07-29 18:46:40.6200.0400-1.330.0218.2
TURFFR2025-07-29 18:46:39.9470.0200-0.021.982025-07-29 18:46:43.1070.0400-0.340.9523.3
BIGNGU2025-07-29 18:46:39.4910.0200-0.341.022025-07-29 18:46:43.2050.0400-0.031.6824.4
IMIGU2025-07-29 18:46:40.4000.0130-0.012.002025-07-29 18:46:44.0040.0400-0.280.9828.2
ENRGU2025-07-29 18:46:40.4000.01400.041.792025-07-29 18:46:43.5700.1504-0.410.8028.5
GBOSGU2025-07-29 18:46:40.5100.0422-0.091.432025-07-29 18:46:44.3760.04000.041.5429.0
STVGU2025-07-29 18:46:41.0320.0200-0.350.992025-07-29 18:46:45.3050.0400-0.350.9234.4
ROROGU2025-07-29 18:46:41.9010.0200-0.011.862025-07-29 18:46:47.3210.04000.630.1336.7
MVIFFR2025-07-29 18:46:43.5020.0200-0.011.742025-07-29 18:46:49.3910.0400-0.131.3143.2
VINDIV2025-07-29 18:46:42.6970.0803-1.040.062025-07-29 18:46:49.1940.1604-0.360.9047.5
ISOFR2025-07-29 18:46:44.2590.02000.051.552025-07-29 18:46:50.8110.04000.340.3550.0
PZZGU2025-07-29 18:46:47.2150.02000.150.872025-07-29 18:46:54.8380.0400-0.560.5866.2


Local magnitude (ML) calculation results
Station Net Channels Stat. Mag. Wood-And.
Ampl.
Dist. (km) Azimuth
SAOF FRHH0.217.96e-214.2222
MGRO GUHH0.225.21e-218.294
TURF FRHH-0.091.64e-223.3246
BIGN GUEH0.112.37e-224.4157
IMI GUHH0.394.61e-228.2127
ENR GUHH0.414.87e-228.5319
GBOS GUHH0.451.92e-229.038
STV GUHH0.481.96e-234.4312
RORO GUHH0.201.33e-236.779
ISO FRHH-0.202.86e-350.0288
PZZ GUHH0.601.70e-266.2321


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 FRHHZ2.8715e-66.2670e-76.2567e-73.7243e-71.5149e-76.1577e-64.1702e-61.9325e-72.2102e-814.2222
SAOF FRHHN2.7140e-65.9261e-75.5484e-73.7853e-72.7441e-76.9249e-64.9466e-63.4796e-71.9788e-814.2222
SAOF FRHHE3.7994e-67.7868e-76.0861e-76.4001e-73.7123e-76.3854e-63.1283e-64.1873e-72.4317e-814.2222
MGRO GUHHZ1.2100e-63.8254e-73.6790e-72.3415e-78.9408e-82.2311e-62.0653e-61.1849e-71.2457e-818.294
MGRO GUHHN1.7938e-64.1696e-74.0939e-72.7153e-71.6088e-76.3627e-62.8368e-62.0561e-71.3802e-818.294
MGRO GUHHE1.2577e-62.9801e-73.1378e-72.0601e-79.0976e-83.7291e-61.2339e-61.1649e-71.0032e-818.294
TURF FRHHZ7.8358e-71.1211e-79.1957e-85.5948e-82.8079e-81.2220e-68.8007e-73.3224e-83.2963e-923.3246
TURF FRHHN1.0943e-62.1920e-71.3648e-77.1476e-84.6684e-83.3568e-69.6811e-75.1335e-85.5528e-923.3246
TURF FRHHE1.0228e-61.5591e-71.3141e-76.6297e-84.6909e-81.7547e-61.4218e-66.1012e-85.1573e-923.3246
BIGN GUEHZ1.0403e-61.2456e-78.6379e-86.2131e-83.2963e-81.7824e-63.9654e-74.4012e-83.2453e-924.4157
BIGN GUEHN1.8751e-62.6795e-71.8080e-71.3118e-76.6297e-83.9352e-66.5294e-77.6386e-87.8360e-924.4157
BIGN GUEHE1.9057e-62.9555e-71.5336e-78.3489e-84.5380e-83.9712e-66.1052e-76.2178e-88.0830e-924.4157
IMI GUHHZ1.3465e-62.1916e-71.7267e-71.1044e-75.7340e-84.5446e-61.1108e-66.1113e-86.2544e-928.2127
IMI GUHHN2.7559e-65.6234e-73.8956e-72.1838e-78.0648e-86.2105e-61.5802e-69.9132e-81.3194e-828.2127
IMI GUHHE1.7706e-63.1924e-72.1311e-71.0176e-75.7290e-85.3166e-61.1821e-68.1460e-89.0611e-928.2127
ENR GUHHZ2.2564e-64.6428e-73.4278e-71.0956e-75.0165e-86.5486e-61.9669e-67.5124e-81.2167e-828.5319
ENR GUHHN4.5908e-65.5549e-73.6447e-71.7945e-78.8625e-89.1585e-61.6163e-61.1362e-71.3959e-828.5319
ENR GUHHE4.9022e-67.2643e-73.7836e-71.5415e-76.4242e-89.8205e-61.5467e-68.9872e-81.4704e-828.5319
GBOS GUHHZ8.2970e-72.0258e-71.1576e-76.8708e-83.4098e-81.6995e-65.5394e-73.5584e-85.2049e-929.038
GBOS GUHHN7.2646e-71.5342e-71.1385e-77.9679e-83.5658e-81.5716e-65.3513e-73.9413e-84.4732e-929.038
GBOS GUHHE6.9882e-71.7036e-71.4765e-71.0098e-74.4181e-81.5551e-67.6558e-75.0008e-84.6937e-929.038
STV GUHHZ1.0093e-62.1689e-71.6455e-75.8182e-83.1686e-82.5659e-68.9084e-74.6150e-86.3820e-934.4312
STV GUHHN1.2044e-61.5702e-71.0918e-73.9605e-81.7800e-82.4820e-64.3954e-72.3824e-84.9286e-934.4312
STV GUHHE1.3966e-62.3781e-71.7254e-77.3098e-83.1442e-83.3843e-61.1451e-64.3449e-86.7225e-934.4312
RORO GUHHZ8.3401e-71.2257e-78.1543e-87.1408e-83.1034e-81.6946e-63.5513e-73.3684e-83.9292e-936.779
RORO GUHHN7.1116e-71.3197e-71.1066e-75.9805e-83.6628e-81.6672e-64.6184e-73.9033e-84.1185e-936.779
RORO GUHHE7.7462e-71.3589e-71.0666e-76.1359e-82.6201e-81.5270e-65.0632e-73.7654e-84.1827e-936.779
ISO FRHHZ2.9314e-73.9992e-82.8684e-81.4488e-87.0147e-96.3485e-71.5630e-78.8049e-91.4583e-950.0288
ISO FRHHN4.5815e-76.6246e-82.7130e-81.2784e-86.8298e-91.0624e-61.2985e-79.0464e-91.4167e-950.0288
ISO FRHHE2.8358e-74.0894e-82.5496e-81.1401e-87.8073e-97.1412e-71.2351e-71.1625e-88.8657e-1050.0288
PZZ GUHHZ5.3408e-71.4808e-71.2944e-75.7881e-82.4719e-81.2426e-67.4050e-73.4002e-83.7562e-966.2321
PZZ GUHHN8.0235e-71.7057e-71.4600e-77.6203e-82.6681e-81.6265e-68.8896e-73.2287e-85.0818e-966.2321
PZZ GUHHE5.7488e-71.5781e-71.2725e-75.6386e-82.1930e-81.2482e-64.7283e-73.0608e-84.0595e-966.2321
*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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