MANUAL Location - Area: Valle del Trebbia , magnitude (ML): 1.5
2025-04-27 17:06:19 (UTC)

Regional Seismic Network of Northwestern Italy (Distav, University of Genoa)
Posted on: 2025-04-28 07:51:10

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Earthquake info - Manual location
Event - ID :250427170556
Magnitude (ML) :1.5 +/- 0.2
Origin Time :2025-04-27 17:06:19.403 (UTC)
Location : Latitude: 44.952 N, Longitude: 9.476 E
Area :Valle del Trebbia
Depth (km) :15.57
Distances (km) : 3.2 --- Piozzano
3.5 --- Agazzano
5.6 --- Pianello Val Tidone
5.8 --- Gazzola
7.8 --- Borgonovo Val Tidone
8.2 --- Ziano Piacentino
10.2 --- Gragnano Trebbiense
10.7 --- Rivergaro
11.0 --- Pecorara
11.3 --- Travo
12.2 --- Rovescala
12.3 --- Sarmato
12.3 --- Gossolengo
12.6 --- Castel San Giovanni
12.6 --- Nibbiano
13.2 --- San Damiano al Colle
13.3 --- Rottofreno
13.4 --- Golferenzo
13.9 --- Caminata
14.0 --- Volpara

Quality location estimate: Erh: 1.2 km, Erz: 2 km, Nf: 24, Gap: 83 °, Rms: 0.23


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.
GORRGU2025-04-27 17:06:27.9800.02210.021.582025-04-27 17:06:34.5000.1273-0.281.2344.0
SARZIV2025-04-27 17:06:30.2000.02001.680.002025-04-27 17:06:38.5650.04003.110.0048.0
BVTIT2025-04-27 17:06:29.8450.02000.260.892025-04-27 17:06:37.6450.04000.151.2853.9
RNCAGU2025-04-27 17:06:32.4400.03510.520.462025-04-27 17:06:41.4500.32570.071.1569.4
GRAMGU2025-04-27 17:06:31.9460.0200-0.341.082025-04-27 17:06:42.1630.04000.031.4171.1
MSSAIV2025-04-27 17:06:31.9500.0351-0.221.382025-04-27 17:06:42.1260.31370.191.0872.6
MDIIV2025-04-27 17:06:37.5900.04720.910.222025-04-27 17:06:49.8400.6239-0.350.7594.3
TRESNI2025-04-27 17:06:38.3840.0200-0.111.502025-04-27 17:06:52.7100.3177-0.520.73102.2
PLMAIV2025-04-27 17:06:37.4630.0200-0.081.532025-04-27 17:06:50.4820.0400-0.161.25105.7
MUGIOCH2025-04-27 17:06:39.6600.0592-0.011.472025-04-27 17:06:54.9850.4158-0.180.94114.2
VAREIV2025-04-27 17:06:40.8200.06030.780.332025-04-27 17:06:56.3280.40180.220.92117.0


Local magnitude (ML) calculation results
Station Net Channels Stat. Mag. Wood-And.
Ampl.		 Dist. (km) Azimuth
GORR GUHH1.431.60e-144.0201
SARZ IVHH1.732.66e-148.0258
BVT ITHN1.521.30e-153.9156
RNCA GUHH1.012.33e-269.4218
GRAM GUHH1.287.51e-271.1137
MSSA IVHH1.435.65e-272.6177
MDI IVHH1.878.61e-294.312
PLMA IVHH1.553.02e-2105.7163
MUGIOCHHH1.792.09e-2114.2343
VARE IVHH1.522.25e-2117.0332


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 GUHHZ4.1800e-67.9716e-77.9099e-73.7924e-71.9596e-71.3210e-54.7022e-62.2270e-72.7964e-844.0201
GORR GUHHN3.9144e-61.1008e-67.8667e-76.1018e-72.4532e-71.7551e-52.7553e-62.5253e-73.1085e-844.0201
GORR GUHHE6.6097e-61.7615e-61.1497e-67.7605e-74.1556e-71.2743e-56.5484e-64.5531e-74.7713e-844.0201
SARZ IVHHZ3.9034e-61.1569e-61.0394e-65.9675e-72.3174e-71.2571e-54.5540e-62.6036e-73.1069e-848.0258
SARZ IVHHN5.5145e-62.0231e-61.8447e-61.1550e-65.2773e-71.9062e-51.6135e-56.8189e-77.0146e-848.0258
SARZ IVHHE4.1437e-61.2613e-61.3357e-67.7248e-72.8706e-78.7700e-67.8623e-63.0919e-74.0247e-848.0258
BVT ITHNZ3.2353e-66.9367e-74.7842e-73.6775e-71.6582e-71.6551e-52.4359e-61.8622e-71.9646e-853.9156
BVT ITHNN4.5317e-61.1754e-69.8206e-76.1644e-73.0866e-71.1829e-54.3697e-64.4254e-74.0044e-853.9156
BVT ITHNE4.5543e-61.1403e-61.1459e-66.5227e-72.3442e-71.8136e-55.7442e-63.2036e-73.9668e-853.9156
RNCA GUHHZ8.0448e-71.4852e-71.0231e-75.0952e-82.8661e-82.7744e-64.0271e-74.3864e-85.1252e-969.4218
RNCA GUHHN9.2458e-72.2665e-71.6215e-77.7313e-83.0565e-82.7281e-67.9260e-74.3813e-85.6951e-969.4218
RNCA GUHHE1.2535e-62.9507e-72.1391e-78.0940e-83.7471e-84.1651e-61.3457e-65.4070e-86.2347e-969.4218
GRAM GUHHZ1.1976e-62.4102e-72.3385e-71.5925e-76.6808e-82.4451e-61.6200e-68.3036e-81.1104e-871.1137
GRAM GUHHN1.6376e-65.0793e-76.0996e-72.6559e-71.1463e-74.4096e-63.8380e-61.6207e-71.9417e-871.1137
GRAM GUHHE2.9527e-66.8759e-77.7026e-72.5721e-71.0844e-76.6515e-65.4724e-61.5937e-72.1315e-871.1137
MSSA IVHHZ1.1726e-63.6924e-72.3351e-72.6556e-71.7971e-72.7079e-61.7147e-62.3271e-71.1856e-872.6177
MSSA IVHHN1.9521e-65.6974e-74.5164e-72.3935e-71.3027e-73.4995e-62.9704e-61.6719e-71.8769e-872.6177
MSSA IVHHE1.5250e-64.0815e-73.6252e-72.3851e-71.2282e-73.7131e-62.2994e-61.2937e-71.0971e-872.6177
MDI IVHHZ2.2973e-64.6430e-73.7068e-71.2266e-75.4435e-87.3619e-61.9949e-68.1155e-81.3690e-894.312
MDI IVHHN2.7558e-65.8351e-75.3949e-71.6988e-78.2270e-88.9265e-63.0008e-61.1562e-71.4867e-894.312
MDI IVHHE5.5028e-61.2538e-68.1967e-72.4484e-71.1838e-71.6476e-53.4732e-61.7740e-72.9690e-894.312
PLMA IVHHZ6.8670e-71.5413e-71.3449e-78.9932e-85.5019e-81.9183e-67.4253e-76.1042e-84.6199e-9105.7163
PLMA IVHHN1.1201e-63.7499e-72.3742e-71.2876e-77.4958e-82.6909e-61.6796e-61.2155e-79.3971e-9105.7163
PLMA IVHHE9.5972e-72.5265e-72.4178e-71.3683e-77.2758e-82.4042e-61.3726e-61.1189e-77.1362e-9105.7163
MUGIOCHHHZ1.4336e-62.7115e-72.6927e-79.2089e-83.9147e-83.5939e-61.6299e-66.1011e-87.4934e-9114.2343
MUGIOCHHHN1.6212e-62.2033e-71.9685e-78.2600e-83.5423e-83.1049e-61.4696e-64.0330e-85.9201e-9114.2343
MUGIOCHHHE1.1260e-62.9903e-72.0656e-78.7951e-83.6453e-83.2350e-67.5288e-75.3833e-87.7928e-9114.2343
VARE IVHHZ9.8748e-71.7243e-71.3488e-74.8220e-82.2440e-83.8199e-65.9977e-73.4822e-85.0123e-9117.0332
VARE IVHHN1.4750e-62.0996e-71.9182e-71.0331e-74.1484e-83.4819e-69.2578e-75.8494e-86.4664e-9117.0332
VARE IVHHE1.0299e-63.0845e-72.1751e-79.7355e-83.7118e-82.6572e-61.2495e-65.1171e-86.8990e-9117.0332
*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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