MANUAL Location - Area: Alpi Marittime , magnitude (ML): 0.4
2025-05-31 03:36:30 (UTC)

Regional Seismic Network of Northwestern Italy (Distav, University of Genoa)
Posted on: 2025-06-02 10:35:48

RSNI Logo

Earthquake info - Manual location
Event - ID :250531033604
Magnitude (ML) :0.4 +/- 0.2
Origin Time :2025-05-31 03:36:30.642 (UTC)
Location : Latitude: 44.087 N, Longitude: 7.798 E
Area :Alpi Marittime
Depth (km) :5.02
Distances (km) : 1.1 --- Mendatica
2.6 --- Montegrosso Pian Latte
2.8 --- Cosio di Arroscia
3.9 --- Briga Alta
5.9 --- Pornassio
9.2 --- Armo
9.3 --- Rezzo
10.3 --- Pieve di Teco
10.7 --- Triora
10.8 --- Molini di Triora
11.9 --- Ormea
12.9 --- Caprauna
13.8 --- Vessalico
14.9 --- Borghetto d Arroscia
15.0 --- Carpasio
15.2 --- Aurigo
16.5 --- Aquila di Arroscia
16.5 --- Cesio
16.6 --- Caravonica
16.6 --- Alto

Quality location estimate: Erh: 0.6 km, Erz: 0.6 km, Nf: 44, Gap: 46 °, Rms: 0.24


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.
MGROGU2025-05-31 03:36:32.7600.01200.081.442025-05-31 03:36:33.9120.0230-0.310.998.4
PVTIT2025-05-31 03:36:33.3840.0200-0.021.822025-05-31 03:36:35.0310.0400-0.500.6712.4
MLIGIV2025-05-31 03:36:34.1720.02000.031.812025-05-31 03:36:36.1370.0400-0.670.3715.2
GBOSGU2025-05-31 03:36:34.5100.01500.021.862025-05-31 03:36:36.9500.0541-0.171.2118.4
IMIGU2025-05-31 03:36:35.0900.0140-0.011.872025-05-31 03:36:37.8650.0872-0.610.5321.9
ROROGU2025-05-31 03:36:35.0500.0140-0.051.662025-05-31 03:36:37.9100.0661-0.350.9522.2
BRDIT2025-05-31 03:36:35.2620.0200-0.011.852025-05-31 03:36:38.1190.0400-0.580.6022.4
GARSIT2025-05-31 03:36:33.7950.0200-1.220.112025-05-31 03:36:37.7320.0400-0.301.0322.4
SAOFFR2025-05-31 03:36:35.7800.02000.340.382025-05-31 03:36:38.8200.0702-0.161.3123.1
BIGNGU2025-05-31 03:36:35.8700.01600.111.212025-05-31 03:36:39.2820.1002-0.251.1525.3
DNSPIT2025-05-31 03:36:36.1640.02000.071.552025-05-31 03:36:40.1640.04000.051.4928.5
ENRGU2025-05-31 03:36:37.1590.0200-0.021.782025-05-31 03:36:41.7600.10020.041.3534.7
TURFFR2025-05-31 03:36:38.2100.02210.410.422025-05-31 03:36:42.7080.1283-0.161.3035.1
CANOGU2025-05-31 03:36:37.6440.0200-0.580.592025-05-31 03:36:42.2300.1133-1.260.1137.9
BURYGU2025-05-31 03:36:37.8150.0200-0.281.042025-05-31 03:36:42.9300.2537-0.490.7839.3
STVGU2025-05-31 03:36:38.2140.0200-0.201.152025-05-31 03:36:43.4820.0400-0.281.1042.0
ESCAFR2025-05-31 03:36:39.8420.02000.570.252025-05-31 03:36:45.3600.0400-0.031.4344.6
MVIFFR2025-05-31 03:36:41.9260.02000.500.352025-05-31 03:36:48.8200.1695-0.251.1256.0
PZZGU2025-05-31 03:36:43.5870.0200-0.031.502025-05-31 03:36:52.5400.2156-0.121.1171.8
PCPGU2025-05-31 03:36:45.4920.02001.410.002025-05-31 03:36:53.8220.04000.260.8078.2
BHBGU2025-05-31 03:36:46.7880.02000.400.472025-05-31 03:36:57.5550.04000.350.6693.5


Local magnitude (ML) calculation results
Station Net Channels Stat. Mag. Wood-And.
Ampl.
Dist. (km) Azimuth
MGRO GUHH0.544.23e-18.4171
PVT ITHN0.481.86e-112.4118
GBOS GUHH0.041.72e-218.411
RORO GUHH0.405.44e-222.283
BRD ITHN0.476.31e-222.4195
GARS ITHN0.649.46e-222.453
BIGN GUEH0.253.02e-225.3191
DNSP ITHN0.666.30e-228.5129
ENR GUHH0.524.35e-234.7298
TURF FRHH0.352.08e-235.1249
CANO GUHH0.452.24e-237.969
BURY GUHH0.492.26e-239.3210
STV GUHH0.135.95e-342.0295
PZZ GUHH0.491.12e-271.8311
PCP GUHH0.283.66e-378.249
BHB GUHH0.584.02e-393.5333


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.
(°)
MGRO GUHHZ2.8812e-53.8565e-61.8178e-66.7615e-73.5013e-79.6322e-58.5501e-65.3297e-78.5120e-88.4171
MGRO GUHHN5.0667e-57.4299e-63.4562e-61.1927e-66.3364e-78.5718e-51.4602e-59.6574e-71.6285e-78.4171
MGRO GUHHE1.0065e-41.1662e-53.0751e-67.4264e-73.9738e-71.3902e-41.3027e-58.1422e-72.2941e-78.4171
PVT ITHNZ2.9262e-52.3555e-68.1408e-73.0426e-71.8279e-73.3492e-52.8842e-62.8887e-75.2658e-812.4118
PVT ITHNN3.2935e-54.4479e-61.2923e-64.6814e-73.4512e-75.7327e-54.9954e-65.9361e-71.0836e-712.4118
PVT ITHNE4.3511e-54.0426e-66.3592e-72.7032e-71.5513e-74.0035e-52.5695e-62.9767e-78.8291e-812.4118
GBOS GUHHZ2.4815e-64.9948e-72.1564e-79.2088e-84.5502e-81.1053e-59.3266e-76.1400e-89.2944e-918.411
GBOS GUHHN2.1101e-62.9233e-71.5628e-76.1277e-83.3044e-84.4603e-68.6310e-74.6219e-86.5310e-918.411
GBOS GUHHE3.0250e-63.7972e-71.3761e-73.7661e-82.2377e-81.2318e-55.2783e-74.1265e-87.8804e-918.411
IMI GUHHZ2.4871e-62.6867e-71.2933e-75.2621e-82.2265e-84.3260e-64.2090e-73.3306e-86.6972e-921.9159
IMI GUHHN4.1799e-65.4962e-72.8793e-76.7319e-84.0415e-81.3183e-51.2814e-66.8004e-81.3362e-821.9159
IMI GUHHE3.8246e-65.7115e-72.1106e-75.7405e-82.8349e-86.2338e-61.3392e-64.4766e-81.0879e-821.9159
RORO GUHHZ4.1897e-64.8228e-72.1231e-75.7658e-83.1975e-86.4186e-66.2337e-74.8702e-89.6152e-922.283
RORO GUHHN6.0003e-69.9559e-74.9871e-71.0135e-76.5794e-81.0922e-51.5967e-61.0682e-72.0321e-822.283
RORO GUHHE7.1414e-66.7229e-72.7108e-76.3902e-83.5955e-81.0194e-57.1103e-77.0073e-81.6829e-822.283
BRD ITHNZ7.5631e-67.3167e-72.9846e-72.2239e-71.3222e-77.9364e-61.6761e-61.4407e-71.2945e-822.4195
BRD ITHNN3.7762e-67.2192e-74.8954e-73.6081e-71.9417e-71.3952e-52.4919e-62.3645e-72.4960e-822.4195
BRD ITHNE3.0395e-65.0949e-73.6721e-72.5624e-71.2152e-71.0795e-52.0193e-61.4139e-71.1539e-822.4195
GARS ITHNZ5.0269e-65.6897e-74.4281e-72.8705e-71.5200e-78.9405e-62.9576e-62.1144e-71.5697e-822.453
GARS ITHNN4.4979e-69.0853e-76.5137e-73.1800e-71.5793e-71.4762e-53.5122e-62.0746e-72.3804e-822.453
GARS ITHNE6.5572e-61.1737e-66.8285e-74.6665e-73.8414e-71.3071e-52.6233e-67.0162e-75.3497e-822.453
SAOF FRHHZ6.0354e-79.5664e-85.7157e-82.8553e-81.5501e-81.1256e-63.8526e-71.5959e-82.3944e-923.1240
SAOF FRHHN7.5377e-71.5265e-78.3768e-85.6531e-82.3435e-81.4878e-64.0676e-72.9262e-83.2994e-923.1240
SAOF FRHHE1.0741e-61.0373e-76.7399e-83.9331e-81.7471e-81.5808e-64.6324e-72.4103e-83.0414e-923.1240
BIGN GUEHZ2.7098e-62.6616e-71.0930e-73.7916e-82.4516e-84.4495e-64.4216e-73.8041e-85.0828e-925.3191
BIGN GUEHN1.4574e-51.1291e-62.1194e-77.0089e-83.8140e-86.9663e-67.2760e-77.4822e-81.8701e-825.3191
BIGN GUEHE6.4480e-65.5810e-71.3436e-74.5233e-82.4663e-84.6518e-66.0603e-74.2528e-89.2351e-925.3191
DNSP ITHNZ3.7887e-64.5956e-73.9872e-72.9186e-71.9347e-75.9858e-61.8959e-62.3023e-71.7055e-828.5129
DNSP ITHNN3.6693e-65.4333e-74.0142e-73.0901e-71.4791e-77.4934e-62.0305e-61.9338e-72.1830e-828.5129
DNSP ITHNE4.4743e-68.9290e-75.3837e-73.3445e-71.8513e-79.6355e-61.8889e-62.2914e-72.6510e-828.5129
ENR GUHHZ3.9721e-64.2692e-71.4770e-74.2468e-82.0636e-87.6275e-65.9790e-73.3554e-87.5395e-934.7298
ENR GUHHN1.4211e-51.3263e-63.1088e-78.7424e-85.4074e-81.4354e-51.5171e-61.0501e-72.4449e-834.7298
ENR GUHHE1.8530e-51.5441e-62.0261e-76.3964e-83.6894e-81.4348e-56.3972e-79.7845e-82.5923e-834.7298
TURF FRHHZ8.9438e-71.4079e-78.1102e-83.1730e-81.8088e-81.9947e-64.5448e-72.6236e-83.8543e-935.1249
TURF FRHHN1.9430e-63.5817e-71.6479e-74.3354e-82.4239e-86.6648e-66.7406e-73.8503e-87.7946e-935.1249
TURF FRHHE1.7262e-62.7385e-71.4550e-73.7555e-82.0401e-84.9741e-65.8829e-73.3576e-86.5134e-935.1249
CANO GUHHZ1.8698e-62.3127e-71.0624e-73.8532e-82.0452e-83.8032e-63.8930e-73.2400e-85.6953e-937.969
CANO GUHHN2.5035e-62.9420e-71.9954e-77.0740e-82.7424e-85.3980e-61.1043e-63.8485e-87.0297e-937.969
CANO GUHHE2.3399e-63.7740e-71.8710e-75.2531e-82.5905e-85.4354e-67.6933e-74.6810e-88.5981e-937.969
BURY GUHHZ1.0395e-61.4350e-71.0252e-73.4800e-81.8469e-82.3607e-66.0502e-72.4558e-83.9475e-939.3210
BURY GUHHN1.4979e-63.0978e-71.8160e-76.9918e-83.7025e-82.9584e-61.1612e-64.7565e-86.5918e-939.3210
BURY GUHHE2.0105e-62.2765e-71.4189e-74.2108e-82.0237e-84.9688e-68.1154e-73.0603e-85.2283e-939.3210
STV GUHHZ1.4150e-61.5037e-75.6827e-81.6397e-88.9726e-93.3337e-61.6991e-71.4504e-83.2370e-942.0295
STV GUHHN2.1493e-61.7852e-74.8267e-81.4439e-88.1049e-93.0516e-61.6778e-71.4251e-83.0328e-942.0295
STV GUHHE2.0549e-61.5704e-75.6459e-81.5554e-87.2268e-92.5105e-62.3606e-71.3643e-83.6288e-942.0295
ESCA FRHHZ3.5420e-74.5444e-83.2407e-81.7334e-86.6977e-98.3317e-71.1479e-78.4220e-91.1647e-944.6230
ESCA FRHHN6.0531e-78.9012e-84.9619e-81.7461e-89.3878e-91.3825e-61.7915e-71.1820e-81.9803e-944.6230
ESCA FRHHE4.6144e-78.4575e-84.4418e-81.6528e-87.0744e-91.3478e-61.7231e-71.1216e-82.0939e-944.6230
PZZ GUHHZ4.3078e-78.3617e-85.9794e-81.9421e-88.6394e-91.4958e-62.9223e-71.2083e-81.9846e-971.8311
PZZ GUHHN5.8892e-71.2385e-78.3250e-83.6432e-81.7221e-81.6785e-63.5786e-72.3831e-83.3613e-971.8311
PZZ GUHHE5.5904e-71.1708e-78.5018e-83.4850e-81.8639e-81.8236e-66.5261e-72.5910e-82.9358e-971.8311
PCP GUHHZ2.6330e-73.5189e-82.5198e-81.2190e-85.1666e-95.4860e-71.3505e-77.4578e-99.4446e-1078.249
PCP GUHHN3.8270e-75.3835e-83.5844e-81.1623e-86.7287e-98.1521e-71.6318e-71.0772e-81.2989e-978.249
PCP GUHHE4.1271e-75.0967e-83.4979e-81.4697e-87.5366e-91.1845e-61.3741e-71.0270e-81.2663e-978.249
BHB GUHHZ2.0669e-73.6026e-82.1749e-89.8176e-97.2093e-96.7578e-71.5222e-71.4820e-81.4245e-993.5333
BHB GUHHN2.4538e-75.1466e-83.4474e-81.2970e-85.9700e-96.2597e-72.7449e-77.9459e-91.2605e-993.5333
BHB GUHHE2.5131e-73.2878e-83.0230e-81.4265e-84.8155e-96.5223e-71.8112e-76.4158e-99.5185e-1093.5333
*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)

rsni