MANUAL Location - Area: Alpi Marittime , magnitude (ML): 0.4
2025-04-11 20:13:16 (UTC)

Regional Seismic Network of Northwestern Italy (Distav, University of Genoa)
Posted on: 2025-04-14 07:52:26

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Earthquake info - Manual location
Event - ID :250411201148
Magnitude (ML) :0.4 +/- 0.2
Origin Time :2025-04-11 20:13:16.965 (UTC)
Location : Latitude: 43.969 N, Longitude: 7.631 E
Area :Alpi Marittime
Depth (km) :5.59
Distances (km) : 4.7 --- Pigna
5.6 --- Castel Vittorio
8.9 --- Rocchetta Nervina
10.0 --- Isolabona
10.0 --- Apricale
10.2 --- Baiardo
11.1 --- Triora
11.5 --- Perinaldo
11.7 --- Molini di Triora
12.5 --- Airole
13.0 --- Dolceacqua
13.5 --- Olivetta San Michele
15.0 --- Ceriana
15.6 --- Soldano
15.8 --- Briga Alta
16.6 --- Seborga
16.7 --- San Biagio della Cima
17.0 --- Camporosso
17.5 --- Vallebona
17.6 --- Montalto Ligure

Quality location estimate: Erh: 0.5 km, Erz: 0.4 km, Nf: 36, Gap: 59 °, Rms: 0.20


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.
MLIGIV2025-04-11 20:13:19.2530.0200-0.001.742025-04-11 20:13:20.6710.0400-0.360.917.3
SAOFFR2025-04-11 20:13:19.6200.01600.460.032025-04-11 20:13:20.7300.0270-0.111.038.9
BRDIT2025-04-11 20:13:19.7600.02000.051.532025-04-11 20:13:21.5190.0400-0.240.7012.6
BIGNGU2025-04-11 20:13:20.2300.01400.021.722025-04-11 20:13:22.2100.0501-0.390.8615.5
MGROGU2025-04-11 20:13:21.0200.0160-0.051.552025-04-11 20:13:23.6120.0551-0.550.4617.8
TURFFR2025-04-11 20:13:21.4900.01900.170.592025-04-11 20:13:24.1090.0591-0.340.8620.0
SNRMIT2025-04-11 20:13:21.1080.02000.001.742025-04-11 20:13:23.7090.0400-0.420.8121.3
BURYGU2025-04-11 20:13:21.1300.0170-0.350.922025-04-11 20:13:23.7490.0651-0.960.0722.3
IMIGU2025-04-11 20:13:21.5100.03010.001.712025-04-11 20:13:24.5270.0701-0.340.8622.9
PVTIT2025-04-11 20:13:22.0820.0200-0.011.732025-04-11 20:13:25.2440.0400-0.660.2325.3
ESCAFR2025-04-11 20:13:22.3900.02010.001.712025-04-11 20:13:25.8200.0772-0.480.6626.4
ENRGU2025-04-11 20:13:23.4290.0251-0.061.442025-04-11 20:13:27.7460.1083-0.211.0034.2
GBOSGU2025-04-11 20:13:23.9790.10040.230.522025-04-11 20:13:28.4810.10830.101.0135.1
ROROGU2025-04-11 20:13:24.3960.02000.140.832025-04-11 20:13:29.3500.1193-0.061.1638.6
MVIFFR2025-04-11 20:13:24.9180.02000.021.532025-04-11 20:13:29.5590.1002-1.100.0639.6
STVGU2025-04-11 20:13:24.3910.02000.001.582025-04-11 20:13:29.0110.0400-0.420.7639.7
ISOFR2025-04-11 20:13:26.7560.02000.081.222025-04-11 20:13:32.9600.1574-0.410.7452.6
SURFFR2025-04-11 20:13:32.3900.0492-0.151.092025-04-11 20:13:42.7700.2607-0.480.6386.7


Local magnitude (ML) calculation results
Station Net Channels Stat. Mag. Wood-And.
Ampl.		 Dist. (km) Azimuth
SAOF FRHH0.211.80e-18.9288
BRD ITHN0.501.89e-112.6135
BIGN GUEH0.421.10e-115.5142
MGRO GUHH0.134.34e-217.860
TURF FRHH0.488.03e-220.0272
SNRM ITHN0.568.64e-221.3143
BURY GUHH0.639.24e-222.3196
IMI GUHH0.356.19e-222.9107
PVT ITHN0.485.18e-225.371
ESCA FRHH0.071.88e-226.4233
ENR GUHH0.881.01e-134.2330
GBOS GUHH0.732.51e-235.129
RORO GUHH0.321.59e-238.665
STV GUHH0.381.17e-239.7322
ISO FRHH0.216.73e-352.6297


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 FRHHZ2.2777e-52.0977e-68.0363e-73.3279e-71.6169e-72.3688e-55.2257e-62.2785e-74.7885e-88.9288
SAOF FRHHN5.3828e-55.6124e-61.0898e-64.6434e-72.7687e-75.3880e-54.7915e-65.5433e-71.1148e-78.9288
SAOF FRHHE6.1590e-55.4312e-68.0377e-72.6582e-71.5763e-74.5835e-53.1898e-63.7254e-71.1359e-78.9288
BRD ITHNZ2.4521e-52.0025e-66.7596e-72.6201e-71.4112e-72.4194e-53.0596e-62.1606e-72.6328e-812.6135
BRD ITHNN1.5443e-52.2488e-61.5825e-66.0432e-72.6599e-72.2934e-59.4085e-63.5051e-76.1773e-812.6135
BRD ITHNE1.9487e-52.6655e-61.7447e-65.4632e-72.6125e-73.1086e-56.5740e-64.4129e-76.2065e-812.6135
BIGN GUEHZ1.6954e-51.5989e-65.9097e-71.3035e-77.5590e-81.6117e-51.8210e-61.2815e-72.7896e-815.5142
BIGN GUEHN2.7807e-53.3297e-69.2426e-72.9934e-71.5694e-73.8220e-53.3560e-62.6818e-75.7788e-815.5142
BIGN GUEHE2.5779e-53.1003e-67.5612e-72.0841e-71.2824e-73.8468e-52.3812e-62.1671e-76.2731e-815.5142
MGRO GUHHZ9.5718e-61.0095e-61.6877e-75.1328e-82.4492e-84.7126e-65.8409e-73.5864e-86.3843e-917.860
MGRO GUHHN5.9138e-66.3402e-72.6284e-76.8358e-83.8287e-89.7223e-61.0907e-66.6741e-81.4881e-817.860
MGRO GUHHE6.8352e-67.8121e-73.6214e-71.0767e-74.4546e-88.1780e-61.2921e-66.8779e-81.6079e-817.860
TURF FRHHZ3.8623e-66.0971e-72.7191e-71.1791e-75.3164e-88.1240e-61.2386e-68.7801e-81.4762e-820.0272
TURF FRHHN7.8628e-61.2327e-64.4428e-71.6821e-77.4324e-81.5875e-51.6724e-61.0967e-72.4350e-820.0272
TURF FRHHE1.0865e-51.5437e-66.3334e-71.4554e-79.1901e-82.5061e-52.7317e-61.7622e-73.8206e-820.0272
SNRM ITHNZ7.9561e-68.0879e-74.9735e-72.5899e-71.5495e-71.9181e-51.7680e-62.1498e-72.1911e-821.3143
SNRM ITHNN7.9493e-61.2194e-67.1895e-73.9888e-72.4376e-72.0706e-52.8740e-63.1625e-72.9199e-821.3143
SNRM ITHNE8.9636e-61.3085e-67.1725e-73.5506e-71.8635e-72.1458e-53.6103e-62.5708e-73.0242e-821.3143
BURY GUHHZ9.3263e-67.6334e-74.0809e-71.5081e-75.9089e-81.1368e-52.5826e-67.4021e-81.3673e-822.3196
BURY GUHHN1.2056e-51.4323e-66.8619e-71.9794e-79.4445e-81.6390e-52.7835e-61.6309e-72.9486e-822.3196
BURY GUHHE1.2722e-51.7520e-66.0098e-72.5552e-71.1835e-72.3367e-52.7814e-61.7458e-73.6985e-822.3196
IMI GUHHZ3.3031e-64.7039e-72.4605e-71.0126e-74.8058e-89.0104e-61.3746e-66.3752e-81.0688e-822.9107
IMI GUHHN1.3439e-51.7195e-65.6886e-71.2123e-76.1446e-82.0426e-52.7843e-61.2455e-73.1328e-822.9107
IMI GUHHE6.3803e-69.8515e-74.4312e-71.3505e-76.5122e-81.2379e-51.8142e-69.6555e-81.9079e-822.9107
PVT ITHNZ6.4492e-64.9135e-73.4606e-72.6025e-71.5569e-76.2431e-62.0542e-62.0939e-71.5218e-825.371
PVT ITHNN8.6773e-67.7452e-73.6617e-73.2922e-71.8660e-76.0174e-62.2394e-62.4465e-71.7153e-825.371
PVT ITHNE9.0471e-67.7361e-74.0037e-73.2459e-71.6349e-71.2270e-51.8559e-61.9670e-71.9730e-825.371
ESCA FRHHZ3.1932e-62.9306e-78.9648e-83.0635e-81.6209e-82.3896e-64.7462e-72.1340e-84.7071e-926.4233
ESCA FRHHN3.3010e-64.8967e-71.7678e-75.2261e-82.3206e-86.7288e-68.1660e-73.8432e-81.0447e-826.4233
ESCA FRHHE2.3999e-62.9007e-71.4514e-73.7204e-82.0598e-86.5549e-66.4224e-73.4100e-86.8413e-926.4233
ENR GUHHZ1.0596e-58.0899e-71.6793e-75.1936e-82.9317e-88.3054e-68.0992e-76.0485e-81.5793e-834.2330
ENR GUHHN4.6449e-54.2897e-64.1137e-71.4257e-78.7776e-82.4089e-51.7313e-62.6227e-77.2734e-834.2330
ENR GUHHE4.9374e-53.9856e-63.6688e-71.2564e-77.7510e-82.2632e-51.6673e-62.3268e-77.2410e-834.2330
GBOS GUHHZ1.9846e-63.1201e-71.4063e-73.5492e-82.4658e-85.8919e-64.6201e-74.0792e-87.7805e-935.129
GBOS GUHHN2.4243e-62.3730e-71.0250e-72.8714e-81.7907e-86.1645e-63.7804e-72.3780e-84.8427e-935.129
GBOS GUHHE2.4415e-64.6500e-71.9132e-75.4981e-83.5080e-87.5012e-67.8407e-75.6389e-88.9424e-935.129
RORO GUHHZ4.1546e-64.6312e-71.1078e-72.6609e-81.5429e-86.1733e-64.6590e-72.9955e-86.2563e-938.665
RORO GUHHN1.9945e-62.3959e-71.0162e-73.7875e-83.1630e-84.2600e-63.3518e-75.6539e-86.6918e-938.665
RORO GUHHE2.8031e-63.0046e-71.0410e-72.3967e-81.1693e-84.0223e-64.8874e-72.3010e-85.2635e-938.665
STV GUHHZ2.0072e-62.1560e-78.5183e-82.2250e-81.1635e-82.9462e-64.4554e-72.1151e-84.1093e-939.7322
STV GUHHN2.4887e-62.5479e-79.3823e-82.5963e-81.4284e-83.3149e-63.7369e-72.6444e-85.4928e-939.7322
STV GUHHE4.8451e-63.7912e-79.6030e-82.9600e-81.6735e-85.1445e-64.0712e-72.7444e-87.5477e-939.7322
ISO FRHHZ3.8087e-75.0528e-83.1225e-89.7236e-95.0506e-91.1165e-61.3544e-78.4691e-91.2085e-952.6297
ISO FRHHN5.6682e-71.0839e-74.8558e-81.7952e-81.0054e-81.7769e-62.4323e-71.5034e-82.4193e-952.6297
ISO FRHHE3.7382e-74.8877e-82.9536e-81.3195e-81.2485e-87.7337e-71.1960e-72.0648e-81.9487e-952.6297
*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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