MANUAL Location - Area: Riviera di ponente , magnitude (ML): 0.9
2026-04-19 21:02:06 (UTC)

Regional Seismic Network of Northwestern Italy (Distav, University of Genoa)
Posted on: 2026-04-20 07:37:44

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Earthquake info - Manual location
Event - ID :260419210144
Magnitude (ML) :0.9 +/- 0.2
Origin Time :2026-04-19 21:02:06.911 (UTC)
Location : Latitude: 43.720 N, Longitude: 7.788 E
Area :Riviera di ponente
Depth (km) :12.27
Distances (km) : 10.8 --- Ospedaletti
11.2 --- San Remo
12.3 --- Bordighera
14.1 --- Vallecrosia
14.2 --- Seborga
14.4 --- Vallebona
15.3 --- Riva Ligure
15.7 --- San Biagio della Cima
15.9 --- Santo Stefano al Mare
16.3 --- Soldano
16.5 --- Ventimiglia
16.7 --- Taggia
16.8 --- Camporosso
17.1 --- Pompeiana
17.3 --- Terzorio
17.5 --- Castellaro
18.1 --- Ceriana
18.6 --- Cipressa
19.2 --- Perinaldo
19.5 --- Costarainera

Quality location estimate: Erh: 1.8 km, Erz: 1.9 km, Nf: 40, Gap: 256 °, Rms: 0.27


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.
SNRMIT2026-04-19 21:02:09.9850.02000.061.572026-04-19 21:02:12.5750.04000.460.9116.8
BIGNGU2026-04-19 21:02:10.9200.0120-0.021.602026-04-19 21:02:14.3800.06910.470.8521.9
BURYGU2026-04-19 21:02:10.9700.0170-0.400.842026-04-19 21:02:14.5600.0732-0.071.3523.3
BRDIT2026-04-19 21:02:11.3080.0200-0.390.852026-04-19 21:02:14.7870.0400-0.430.7724.5
IMIGU2026-04-19 21:02:11.5900.0150-0.031.562026-04-19 21:02:15.1900.08420.091.3926.3
MLIGIV2026-04-19 21:02:12.9480.0200-0.620.342026-04-19 21:02:17.8150.0400-0.680.3233.3
SAOFFR2026-04-19 21:02:13.9560.0200-0.160.942026-04-19 21:02:19.4000.11830.011.3437.4
ESCAFR2026-04-19 21:02:14.2800.01900.091.442026-04-19 21:02:19.5400.11530.051.3337.6
PVTIT2026-04-19 21:02:14.4570.02000.450.912026-04-19 21:02:18.9450.0400-0.330.8639.3
TURFFR2026-04-19 21:02:15.2760.0200-0.001.572026-04-19 21:02:21.6260.04000.241.0944.3
ROROGU2026-04-19 21:02:15.6500.02710.041.542026-04-19 21:02:22.0990.15840.261.0950.6
MVIFFR2026-04-19 21:02:17.8270.02000.440.882026-04-19 21:02:24.6600.1715-0.380.8456.0
GBOSGU2026-04-19 21:02:18.3510.02001.090.052026-04-19 21:02:24.7100.26370.201.0759.6
ENRGU2026-04-19 21:02:18.3600.0341-0.011.452026-04-19 21:02:27.0900.20260.740.4165.3
STVGU2026-04-19 21:02:19.3920.02000.171.202026-04-19 21:02:28.2400.21760.490.7670.4
ISOFR2026-04-19 21:02:21.0950.02000.400.892026-04-19 21:02:30.8160.04000.291.0479.5
PZZGU2026-04-19 21:02:24.8700.0532-0.121.202026-04-19 21:02:37.5800.3167-0.120.95103.5
PCPGU2026-04-19 21:02:25.6000.05720.590.592026-04-19 21:02:37.8700.4279-0.160.85110.3
SURFFR2026-04-19 21:02:26.9000.2909-0.051.072026-04-19 21:02:41.2290.46490.200.81115.6


Local magnitude (ML) calculation results
Station Net Channels Stat. Mag. Wood-And.
Ampl.
Dist. (km) Azimuth
SNRM ITHN0.862.61e-116.8360
BIGN GUEH1.133.00e-121.9347
BURY GUHH0.628.24e-223.3291
BRD ITHN0.941.58e-124.5346
IMI GUHH0.931.81e-126.322
SAOF FRHH0.542.83e-237.4328
ESCA FRHH0.522.66e-237.6291
PVT ITHN0.885.60e-239.317
RORO GUHH0.611.82e-250.627
STV GUHH1.242.65e-270.4328
PZZ GUHH1.222.57e-2103.5329
PCP GUHH0.998.49e-3110.333


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.
(°)
SNRM ITHNZ8.5882e-61.2984e-68.9984e-72.5022e-71.4110e-71.7543e-55.7443e-62.0094e-73.2470e-816.8360
SNRM ITHNN1.7394e-52.5525e-61.3329e-64.6629e-72.3540e-73.7112e-55.8010e-63.4038e-76.9592e-816.8360
SNRM ITHNE1.6626e-52.7311e-61.8863e-67.9563e-74.1351e-72.3103e-59.4081e-65.9868e-77.9927e-816.8360
BIGN GUEHZ7.2812e-61.3485e-67.5636e-72.1446e-71.0470e-71.2080e-52.9870e-61.6302e-73.2051e-821.9347
BIGN GUEHN2.0689e-53.0013e-61.2976e-64.6403e-71.9695e-73.8977e-56.2146e-63.1371e-76.5759e-821.9347
BIGN GUEHE2.1319e-54.0011e-62.6330e-67.9818e-74.1932e-74.6669e-51.2000e-56.2767e-71.0007e-721.9347
BURY GUHHZ7.4418e-69.0463e-73.7047e-71.1128e-75.2651e-81.0179e-51.6435e-68.8637e-81.7720e-823.3291
BURY GUHHN1.4003e-51.3548e-64.9219e-71.5702e-78.2175e-81.8999e-52.0166e-61.2562e-72.6218e-823.3291
BURY GUHHE1.6984e-51.4130e-66.4905e-72.2183e-71.1246e-71.5263e-52.4528e-61.6914e-72.8160e-823.3291
BRD ITHNZ3.9598e-68.1621e-76.6101e-73.0449e-71.4725e-71.5785e-53.9353e-61.7616e-71.9805e-824.5346
BRD ITHNN4.0411e-68.8426e-76.8709e-73.2481e-71.8330e-78.8563e-64.4081e-63.1748e-72.3769e-824.5346
BRD ITHNE5.1098e-61.5150e-61.2579e-66.3882e-72.5881e-71.3384e-56.9741e-63.2143e-74.4689e-824.5346
IMI GUHHZ1.4008e-51.6730e-64.9281e-71.4824e-78.0774e-82.8848e-52.0995e-61.5499e-73.4902e-826.322
IMI GUHHN1.6998e-52.2124e-67.7484e-72.1746e-71.0436e-75.4535e-52.5362e-61.9640e-74.7699e-826.322
IMI GUHHE1.7566e-53.1905e-61.3729e-64.7148e-72.1561e-75.4678e-57.1140e-63.1967e-77.1976e-826.322
SAOF FRHHZ1.9782e-63.3301e-71.4075e-74.4514e-82.5893e-83.8275e-65.1728e-74.3517e-88.6402e-937.4328
SAOF FRHHN3.0914e-63.0362e-71.2015e-74.2253e-81.9358e-84.2237e-67.0273e-72.9019e-86.3079e-937.4328
SAOF FRHHE4.2628e-65.3777e-71.8840e-79.0069e-83.9283e-86.4747e-65.9555e-76.0989e-81.2065e-837.4328
ESCA FRHHZ2.5473e-62.6458e-71.4134e-74.6872e-82.2698e-82.6657e-67.0748e-73.0632e-85.0846e-937.6291
ESCA FRHHN3.6305e-64.3864e-72.3184e-78.4342e-83.7908e-86.7797e-69.7164e-74.8581e-81.0265e-837.6291
ESCA FRHHE2.5658e-63.5783e-72.1217e-75.3764e-82.9840e-86.4621e-69.3090e-74.1929e-87.4740e-937.6291
PVT ITHNZ8.3273e-68.2061e-73.5946e-73.0960e-71.5979e-79.5432e-62.7147e-61.9781e-71.7645e-839.317
PVT ITHNN1.5273e-51.2454e-63.6743e-72.7209e-71.6319e-71.0265e-51.8951e-62.3455e-72.8424e-839.317
PVT ITHNE1.5538e-51.4960e-64.8355e-72.6974e-71.5338e-73.3324e-52.2864e-62.1188e-73.3936e-839.317
TURF FRHHZ7.9002e-78.9912e-85.9545e-81.9686e-89.3840e-91.3745e-63.2108e-71.2286e-82.5110e-944.3312
TURF FRHHN1.0445e-61.6387e-78.8599e-82.6422e-81.7311e-84.3020e-65.4022e-72.7419e-83.8761e-944.3312
TURF FRHHE1.0522e-61.2969e-76.5663e-82.6339e-81.3416e-82.2815e-62.8143e-72.1369e-83.1430e-944.3312
RORO GUHHZ2.4110e-62.6798e-71.3951e-74.7796e-82.7395e-83.9603e-65.2027e-74.4957e-87.0657e-950.627
RORO GUHHN2.8755e-64.1457e-71.6324e-75.1319e-83.2936e-86.5729e-64.9777e-74.5484e-88.0465e-950.627
RORO GUHHE2.6882e-64.2035e-71.9019e-74.7596e-82.6431e-88.8929e-67.3454e-74.2370e-88.0034e-950.627
GBOS GUHHZ2.8534e-63.6052e-72.2255e-71.2280e-77.9016e-87.5570e-61.3458e-61.0659e-71.6403e-859.64
GBOS GUHHN3.2340e-63.5272e-72.0024e-78.5171e-86.3197e-86.8841e-67.1563e-71.0746e-71.1727e-859.64
GBOS GUHHE2.9108e-64.4622e-73.1936e-71.4640e-77.1951e-86.5322e-61.2705e-68.6930e-81.2250e-859.64
ENR GUHHZ1.1573e-51.0466e-62.0465e-76.2529e-83.4450e-81.0478e-51.0734e-66.9295e-81.9711e-865.3333
ENR GUHHN2.6889e-52.5924e-63.5936e-71.2531e-77.4960e-82.3319e-51.4290e-61.7921e-74.4336e-865.3333
ENR GUHHE3.0994e-52.5965e-63.7558e-71.2435e-77.2002e-82.3441e-51.2355e-61.6430e-74.5948e-865.3333
STV GUHHZ3.3832e-64.4089e-71.6811e-74.1129e-81.9946e-87.4001e-65.9177e-73.7898e-88.9370e-970.4328
STV GUHHN3.1203e-63.6568e-71.2628e-73.0915e-81.8205e-86.9981e-64.9641e-73.1885e-87.0051e-970.4328
STV GUHHE5.1097e-66.0053e-72.5284e-76.3631e-83.1988e-81.2584e-58.8431e-75.5857e-81.2944e-870.4328
ISO FRHHZ4.5447e-75.3733e-82.4323e-81.0336e-85.1510e-99.5146e-71.0324e-77.6916e-91.0975e-979.5311
ISO FRHHN5.5907e-77.2359e-82.6485e-81.1966e-86.1111e-91.1279e-69.3677e-88.8996e-91.5439e-979.5311
ISO FRHHE4.2778e-75.3670e-82.3423e-88.3368e-94.7768e-91.2846e-61.0308e-76.3255e-91.2083e-979.5311
PZZ GUHHZ1.0262e-62.1909e-71.4852e-73.8696e-82.2426e-82.9099e-66.7189e-73.6675e-84.5765e-9103.5329
PZZ GUHHN1.6591e-63.5698e-72.1402e-78.6796e-83.7740e-83.3096e-61.1697e-65.6441e-88.6227e-9103.5329
PZZ GUHHE8.5839e-72.1829e-71.7745e-75.6443e-82.2910e-82.0314e-61.1802e-63.4097e-84.9778e-9103.5329
PCP GUHHZ5.2744e-77.7230e-84.8747e-82.0452e-89.6967e-91.3180e-62.8318e-71.0881e-81.6003e-9110.333
PCP GUHHN4.6210e-75.5974e-84.2482e-81.9797e-89.3785e-91.3276e-62.6991e-71.3755e-81.4725e-9110.333
PCP GUHHE4.8189e-71.0709e-77.5418e-83.0520e-81.1854e-81.3369e-63.3662e-71.6186e-82.5905e-9110.333
*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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