MANUAL Location - Area: Appennino ligure , magnitude (ML): 1.4
2026-05-03 15:57:29 (UTC)

Regional Seismic Network of Northwestern Italy (Distav, University of Genoa)
Posted on: 2026-05-04 07:54:33

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Earthquake info - Manual location
Event - ID :260503155544
Magnitude (ML) :1.4 +/- 0.2
Origin Time :2026-05-03 15:57:29.934 (UTC)
Location : Latitude: 44.569 N, Longitude: 9.235 E
Area :Appennino ligure
Depth (km) :1.67
Distances (km) : 0.3 --- Fascia
1.4 --- Rondanina
3.6 --- Rovegno
3.9 --- Propata
4.7 --- Montebruno
6.0 --- Fontanigorda
6.2 --- Gorreto
7.4 --- Carrega Ligure
8.0 --- Torriglia
9.9 --- Ottone
11.8 --- Zerba
12.9 --- Favale di Malvaro
12.9 --- Rezzoaglio
12.9 --- Neirone
13.4 --- Valbrevenna
15.3 --- Cerignale
15.6 --- Lorsica
15.8 --- Lumarzo
15.8 --- Vobbia
15.9 --- Mongiardino Ligure

Quality location estimate: Erh: 0.4 km, Erz: 0.3 km, Nf: 45, Gap: 130 °, Rms: 0.17


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.
GORRGU2026-05-03 15:57:31.9500.00400.240.612026-05-03 15:57:33.0600.02000.001.976.7
TGLIT2026-05-03 15:57:32.2120.02000.490.322026-05-03 15:57:33.4740.04000.430.377.2
RNSIT2026-05-03 15:57:35.1300.0200-0.021.942026-05-03 15:57:39.0060.04000.081.5323.9
RNCAGU2026-05-03 15:57:35.1500.0120-0.081.612026-05-03 15:57:38.9200.0752-0.061.5225.0
GENLGU2026-05-03 15:57:35.7680.02000.061.742026-05-03 15:57:39.7890.0400-0.001.6727.8
GNVIT2026-05-03 15:57:35.8880.02000.021.902026-05-03 15:57:40.0580.0400-0.011.6528.5
MSSAIV2026-05-03 15:57:36.5000.0231-0.680.162026-05-03 15:57:41.3400.1093-1.380.0236.0
VRLIT2026-05-03 15:57:37.3920.02000.011.832026-05-03 15:57:42.5730.0400-0.510.2337.3
BVTIT2026-05-03 15:57:38.2150.0200-0.091.462026-05-03 15:57:44.0810.0400-0.620.1940.6
PCPGU2026-05-03 15:57:40.0700.0271-0.001.682026-05-03 15:57:47.1600.1635-0.071.1054.7
QLNOIV2026-05-03 15:57:43.4850.0200-0.330.462026-05-03 15:57:54.6840.04000.910.2175.6
PLMAIV2026-05-03 15:57:43.8700.03810.161.172026-05-03 15:57:53.3300.4058-0.790.2875.9
EQUIGU2026-05-03 15:57:45.5300.04320.101.292026-05-03 15:57:57.3980.04000.430.6185.6
ROROGU2026-05-03 15:57:49.1410.02000.940.192026-05-03 15:58:02.4310.04001.090.15105.8
MAIMGU2026-05-03 15:57:52.5780.02001.060.002026-05-03 15:58:06.9590.0400-0.710.28123.8
IMIGU2026-05-03 15:57:52.7710.02000.940.192026-05-03 15:58:08.2510.04000.560.51129.5
POPMGU2026-05-03 15:57:54.1430.06730.720.292026-05-03 15:58:11.4610.04000.630.46134.4


Local magnitude (ML) calculation results
Station Net Channels Stat. Mag. Wood-And.
Ampl.
Dist. (km) Azimuth
GORR GUHH1.333.93e+06.747
TGL ITHN1.102.01e+07.2234
RNS ITHN1.243.29e-123.9277
RNCA GUHH1.313.57e-125.0244
GENL GUEH1.363.28e-127.8229
GNV ITHG1.554.90e-128.5238
VRL ITHN0.998.00e-237.3122
BVT ITHN1.311.43e-140.696
PCP GUHH0.873.12e-254.7267
QLNO IVHH1.152.69e-275.6249
PLMA IVHH1.344.02e-275.9139
EQUI GUHH1.111.86e-285.6121
RORO GUHH1.543.03e-2105.8242
MAIM GUHH1.471.55e-2123.8126
IMI GUHH1.492.21e-2129.5236
POPM GUHH1.442.69e-2134.4115


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.
(°)
GORR GUHHZ2.5507e-43.4761e-51.8902e-56.6638e-63.3139e-64.3202e-41.4331e-45.3879e-69.6409e-76.747
GORR GUHHN4.7311e-46.3338e-52.3083e-51.1474e-55.4869e-65.8421e-49.0818e-59.2197e-61.5268e-66.747
GORR GUHHE3.8027e-46.3951e-53.0610e-51.4179e-57.8062e-61.2010e-31.3478e-41.1700e-51.7459e-66.747
TGL ITHNZ3.9846e-43.6384e-51.0555e-54.2959e-62.8546e-62.5096e-44.4617e-54.3112e-65.5787e-77.2234
TGL ITHNN2.3937e-43.3714e-51.7661e-55.6052e-63.0380e-64.2137e-48.8730e-54.4898e-68.0403e-77.2234
TGL ITHNE1.8271e-42.5563e-51.3115e-56.5968e-63.4793e-65.7243e-46.7273e-54.8657e-66.7819e-77.2234
RNS ITHNZ1.7625e-53.3701e-63.0538e-61.8487e-66.7201e-74.8071e-51.7985e-58.1734e-79.8814e-823.9277
RNS ITHNN1.6496e-53.3186e-62.7140e-61.3791e-65.0600e-74.5226e-51.5428e-56.6138e-78.3475e-823.9277
RNS ITHNE1.5561e-54.0278e-63.1075e-61.4738e-65.9797e-74.4283e-51.4021e-58.1205e-71.0680e-723.9277
RNCA GUHHZ1.8058e-52.2949e-61.4769e-65.8867e-72.8367e-74.8094e-56.3918e-64.0104e-76.2787e-825.0244
RNCA GUHHN1.6072e-53.1891e-62.0967e-67.6321e-73.4174e-74.1165e-51.0136e-55.1070e-77.5511e-825.0244
RNCA GUHHE3.0196e-55.9425e-63.3493e-61.0883e-65.1567e-71.0983e-41.2141e-57.6773e-71.4309e-725.0244
GENL GUEHZ2.1232e-53.0435e-61.4907e-66.0176e-72.8259e-73.2227e-56.4848e-64.0121e-75.1307e-827.8229
GENL GUEHN1.8660e-53.5013e-62.3623e-67.4134e-73.2176e-74.6825e-51.3873e-54.9509e-78.2158e-827.8229
GENL GUEHE1.9138e-54.6473e-63.1210e-61.0942e-64.5776e-74.2466e-51.2870e-55.9352e-71.0530e-727.8229
GNV ITHGZ1.0771e-52.2171e-61.7686e-66.0397e-73.4638e-72.6121e-51.4745e-55.7397e-76.5211e-828.5238
GNV ITHGN1.6909e-53.8844e-63.5775e-61.7918e-66.7892e-74.1477e-52.8512e-59.2938e-71.0996e-728.5238
GNV ITHGE1.9337e-54.1475e-63.4473e-61.2955e-65.3243e-75.3883e-52.5123e-57.8317e-71.1047e-728.5238
MSSA IVHHZ2.6431e-65.0731e-73.0227e-71.3764e-76.3513e-88.1160e-61.2648e-67.9302e-81.0639e-836.0141
MSSA IVHHN2.5367e-65.0817e-73.8827e-71.1304e-75.7638e-88.1932e-61.2858e-68.1228e-81.2944e-836.0141
MSSA IVHHE2.4846e-64.5769e-73.7319e-71.5469e-77.1573e-86.4601e-61.3274e-61.1129e-71.1896e-836.0141
VRL ITHNZ4.4860e-67.9994e-76.1621e-73.4451e-71.9752e-71.3214e-53.0002e-62.5667e-72.4099e-837.3122
VRL ITHNN9.2726e-61.3719e-66.7418e-74.0714e-72.2622e-72.3533e-52.6491e-62.9605e-73.1602e-837.3122
VRL ITHNE6.4977e-61.1004e-66.8646e-73.6057e-72.5132e-71.6308e-53.8991e-64.1102e-72.6186e-837.3122
BVT ITHNZ3.8501e-66.2954e-75.6165e-73.2135e-71.7544e-77.7744e-62.8215e-61.9440e-72.2246e-840.696
BVT ITHNN6.9714e-61.8737e-61.5300e-65.5447e-72.5641e-72.3972e-59.2478e-63.6569e-73.9724e-840.696
BVT ITHNE5.8459e-61.4425e-61.1180e-65.3277e-72.3862e-71.3991e-57.1029e-62.5942e-73.4512e-840.696
PCP GUHHZ1.3883e-62.5920e-72.3565e-79.4162e-84.5810e-84.8304e-61.8494e-65.7749e-86.2706e-954.7267
PCP GUHHN1.5515e-63.2373e-73.0111e-71.7657e-77.0769e-83.4642e-61.9615e-68.7852e-81.0932e-854.7267
PCP GUHHE1.7737e-62.9339e-72.5422e-71.3072e-74.6698e-84.9296e-61.6208e-65.5500e-88.3803e-954.7267
QLNO IVHHZ1.0559e-62.4423e-72.2094e-71.0013e-74.0615e-82.3270e-61.2961e-65.4485e-87.7902e-975.6249
QLNO IVHHN1.9605e-63.4435e-72.5544e-78.6802e-84.6742e-84.9440e-61.2240e-65.3165e-89.3775e-975.6249
QLNO IVHHE1.9645e-63.9763e-72.4962e-78.2526e-83.9673e-83.6800e-69.1008e-75.6271e-89.5955e-975.6249
PLMA IVHHZ2.3664e-63.2939e-72.1120e-71.0049e-74.5042e-85.1043e-67.6143e-75.7239e-87.9124e-975.9139
PLMA IVHHN3.3910e-66.5012e-73.9882e-71.2010e-75.5987e-88.1624e-61.4102e-68.4711e-81.3961e-875.9139
PLMA IVHHE3.5068e-65.0353e-73.0041e-71.0848e-74.1197e-87.4214e-61.3155e-66.3362e-81.0719e-875.9139
EQUI GUHHZ7.6244e-71.3087e-71.1605e-73.6741e-81.7263e-81.6751e-65.7125e-72.6296e-83.1171e-985.6121
EQUI GUHHN1.1681e-61.9389e-71.6837e-76.7853e-82.9694e-82.6824e-69.2578e-73.8154e-85.5531e-985.6121
EQUI GUHHE7.7390e-71.5249e-71.3139e-75.4442e-82.8332e-82.3975e-67.2423e-73.3907e-83.3661e-985.6121
RORO GUHHZ1.0788e-62.1220e-71.9772e-71.2322e-74.5620e-82.3449e-61.2037e-65.7752e-85.7091e-9105.8242
RORO GUHHN1.3254e-63.2240e-72.5368e-71.1265e-75.5708e-83.6477e-61.5592e-67.6112e-88.8848e-9105.8242
RORO GUHHE1.5815e-62.6831e-72.5163e-71.1910e-74.4179e-83.0323e-61.0276e-65.8397e-88.0632e-9105.8242
MAIM GUHHZ2.9362e-76.9664e-85.8631e-83.0469e-81.2425e-88.0700e-73.9726e-71.6520e-82.4337e-9123.8126
MAIM GUHHN5.1414e-71.5772e-71.2955e-76.1669e-82.6234e-81.7365e-66.1434e-73.8645e-84.6775e-9123.8126
MAIM GUHHE5.1577e-71.2819e-71.3055e-76.6367e-84.4491e-81.5255e-68.7557e-75.7912e-84.6819e-9123.8126
IMI GUHHZ2.8210e-79.8109e-88.1838e-86.6224e-84.2651e-88.8728e-76.7243e-75.0090e-83.9057e-9129.5236
IMI GUHHN5.8363e-71.8591e-71.7986e-78.9521e-84.9414e-81.9258e-61.3109e-65.9352e-86.5689e-9129.5236
IMI GUHHE3.9062e-71.4172e-71.2302e-76.0077e-82.9890e-81.0194e-67.1210e-73.9321e-84.4821e-9129.5236
POPM GUHHZ1.1476e-61.5782e-71.2676e-75.2897e-82.2608e-84.2214e-65.7199e-72.9141e-83.8197e-9134.4115
POPM GUHHN1.3490e-62.4353e-71.8624e-78.3200e-83.5832e-85.0039e-66.7085e-74.1209e-86.3005e-9134.4115
POPM GUHHE9.3469e-72.4425e-72.0921e-71.0763e-73.8510e-82.8959e-69.2439e-74.9615e-85.5772e-9134.4115
*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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