MANUAL Location - Area: Appennino ligure , magnitude (ML): 1.5
2026-02-03 17:43:11 (UTC)

Regional Seismic Network of Northwestern Italy (Distav, University of Genoa)
Posted on: 2026-02-04 11:16:22

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Earthquake info - Manual location
Event - ID :260203174213
Magnitude (ML) :1.5 +/- 0.2
Origin Time :2026-02-03 17:43:11.23 (UTC)
Location : Latitude: 44.681 N, Longitude: 9.254 E
Area :Appennino ligure
Depth (km) :9.34
Distances (km) : 3.0 --- Zerba
6.8 --- Brallo di Pregola
7.7 --- Cerignale
8.8 --- Gorreto
8.9 --- Ottone
9.2 --- Carrega Ligure
10.0 --- Fortunago
10.2 --- Santa Margherita di Staffora
10.9 --- Corte Brugnatella
11.4 --- Fabbrica Curone
11.7 --- Rovegno
12.5 --- Cabella Ligure
12.8 --- Fascia
13.0 --- Menconico
13.3 --- Rondanina
13.8 --- Propata
14.3 --- Bobbio
14.5 --- Coli
14.9 --- Albera Ligure
15.1 --- Montacuto

Quality location estimate: Erh: 0.9 km, Erz: 0.9 km, Nf: 27, Gap: 213 °, Rms: 0.22


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.
GORRGU2026-02-03 17:43:13.9700.0040-0.071.672026-02-03 17:43:16.3200.04000.061.8013.3
TGLIT2026-02-03 17:43:15.4310.0200-0.012.022026-02-03 17:43:18.6130.0400-0.061.7020.7
RNSIT2026-02-03 17:43:16.8150.02000.051.892026-02-03 17:43:21.6640.04000.620.2628.6
RNCAGU2026-02-03 17:43:17.0100.0180-0.640.202026-02-03 17:43:22.4520.04000.011.6934.8
BVTIT2026-02-03 17:43:19.1140.0200-0.430.192026-02-03 17:43:25.3930.0400-0.630.2443.4
VRLIT2026-02-03 17:43:19.4750.02000.210.922026-02-03 17:43:25.5330.0400-0.041.4844.9
MSSAIV2026-02-03 17:43:19.7300.02110.091.622026-02-03 17:43:26.2900.24860.091.1246.8
CARIT2026-02-03 17:43:21.7730.02000.360.652026-02-03 17:43:29.4970.04000.231.1057.1
PCPGU2026-02-03 17:43:21.6300.02000.011.762026-02-03 17:43:30.0000.04000.810.1559.1
GRAMGU2026-02-03 17:43:23.3330.0200-0.101.362026-02-03 17:43:32.5890.0400-0.011.2868.3
GBOSGU--:---.-----.---.--2026-02-03 17:43:46.0900.5699-0.420.54122.8


Local magnitude (ML) calculation results
Station Net Channels Stat. Mag. Wood-And.
Ampl.		 Dist. (km) Azimuth
GORR GUHH1.934.69e+013.3160
TGL ITHN1.406.29e-120.7203
RNS ITHN1.182.07e-128.6249
RNCA GUHH1.251.67e-134.8226
BVT ITHN1.733.30e-143.4113
CAR ITHN1.531.17e-157.1149


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 GUHHZ7.4163e-51.8679e-51.5274e-58.0240e-63.8275e-61.7054e-41.1067e-45.1596e-66.6766e-713.3160
GORR GUHHN1.9301e-45.4630e-53.4218e-51.3408e-56.8243e-63.7929e-42.1049e-41.0152e-51.4300e-613.3160
GORR GUHHE1.6609e-44.5563e-53.0415e-51.2152e-56.1553e-63.3614e-41.6207e-48.5984e-61.2403e-613.3160
TGL ITHNZ5.2282e-56.2426e-63.3578e-61.2621e-65.9512e-74.7560e-52.5744e-57.2282e-71.0773e-720.7203
TGL ITHNN3.6803e-56.5863e-64.3411e-61.8857e-66.7275e-71.2339e-41.8744e-58.7812e-71.7039e-720.7203
TGL ITHNE3.3366e-58.6248e-65.8189e-62.2339e-69.7480e-77.8822e-53.6801e-51.3166e-61.9606e-720.7203
RNS ITHNZ6.4705e-62.1718e-61.7416e-68.2479e-73.5556e-72.1649e-58.5289e-64.7766e-74.9761e-828.6249
RNS ITHNN6.8328e-61.5321e-61.7358e-69.7851e-74.4849e-72.0354e-51.0721e-55.2852e-75.0149e-828.6249
RNS ITHNE8.3276e-62.1397e-62.1805e-61.0339e-64.3389e-73.0050e-59.6934e-64.8443e-76.0475e-828.6249
RNCA GUHHZ5.1909e-68.2871e-78.2343e-73.4067e-71.3477e-79.3667e-65.7710e-61.6534e-72.1697e-834.8226
RNCA GUHHN5.6677e-69.1245e-78.1280e-73.4580e-71.5365e-71.2357e-54.8426e-61.9034e-72.9307e-834.8226
RNCA GUHHE9.1897e-62.0090e-61.6384e-66.9300e-72.3267e-72.6669e-57.3413e-63.3605e-75.4254e-834.8226
BVT ITHNZ3.7099e-69.5792e-71.1118e-66.8349e-72.8170e-77.3243e-66.0309e-63.5030e-73.5038e-843.4113
BVT ITHNN1.0020e-53.1056e-63.0821e-61.5377e-65.4828e-71.7151e-52.0969e-57.4154e-71.1310e-743.4113
BVT ITHNE7.1243e-62.3693e-62.3613e-61.2079e-64.8783e-71.5154e-51.3865e-56.1736e-77.8308e-843.4113
MSSA IVHHZ1.7836e-64.5467e-75.1849e-73.8328e-71.7797e-74.4301e-64.1331e-62.2454e-71.9999e-846.8153
MSSA IVHHN1.9651e-65.3409e-74.8769e-72.4922e-71.5974e-74.5004e-61.9829e-62.2102e-71.7509e-846.8153
MSSA IVHHE1.7416e-65.0749e-74.8609e-74.3330e-71.9414e-76.7626e-62.2018e-62.1568e-71.6851e-846.8153
CAR ITHNZ3.5636e-68.0981e-77.9029e-74.2537e-72.2997e-77.0088e-65.8116e-63.5230e-72.4448e-857.1149
CAR ITHNN4.7327e-61.1104e-68.7433e-73.8813e-72.4283e-71.1977e-53.8072e-62.9731e-73.3167e-857.1149
CAR ITHNE4.5370e-61.1843e-61.0307e-65.4792e-72.7052e-78.4877e-66.1769e-63.4008e-73.3695e-857.1149
PCP GUHHZ7.6976e-72.1040e-72.0666e-71.5286e-74.5890e-81.4202e-61.6378e-65.6584e-87.1657e-959.1255
PCP GUHHN6.9458e-71.6847e-71.6179e-71.0958e-73.6182e-81.9126e-69.6269e-74.7865e-86.0083e-959.1255
PCP GUHHE7.1851e-71.9182e-71.7867e-71.0853e-74.4430e-81.8309e-61.0756e-65.5272e-86.1316e-959.1255
GBOS GUHHZ5.0178e-72.1219e-71.6993e-71.6304e-71.4994e-79.3883e-71.2161e-62.2181e-75.0075e-8122.8247
GBOS GUHHN5.9846e-72.3557e-72.2584e-72.4274e-71.7551e-71.1744e-61.4233e-62.4127e-73.9977e-8122.8247
GBOS GUHHE4.6265e-71.7217e-71.4191e-71.4124e-71.2152e-79.5932e-71.0937e-61.4623e-72.1458e-8122.8247
*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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