MANUAL Location - Area: Francia , magnitude (ML): 1.5
2025-11-20 04:18:45 (UTC)

Regional Seismic Network of Northwestern Italy (Distav, University of Genoa)
Posted on: 2025-11-20 08:10:52

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Earthquake info - Manual location
Event - ID :251120041755
Magnitude (ML) :1.5 +/- 0.2
Origin Time :2025-11-20 04:18:45.86 (UTC)
Location : Latitude: 44.224 N, Longitude: 6.572 E
Area :Francia
Depth (km) :5.28
Distances (km) : 34.9 --- Argentera
39.0 --- Pietraporzio
42.0 --- Sambuco
43.5 --- Acceglio
48.1 --- Prazzo
48.2 --- Canosio
48.8 --- Vinadio
49.1 --- Marmora
52.5 --- Aisone
53.2 --- Bellino
54.1 --- Elva
54.2 --- Stroppo
54.9 --- Castelmagno
56.2 --- Celle di Macra
56.8 --- Casteldelfino
57.2 --- Macra
57.3 --- Pontechianale
58.6 --- Demonte
60.4 --- Pradleves
61.8 --- San Damiano Macra

Quality location estimate: Erh: 1.2 km, Erz: 1 km, Nf: 42, Gap: 117 °, Rms: 0.41


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.
OGDIFR2025-11-20 04:18:50.7400.0140-1.480.052025-11-20 04:18:54.7600.1314-2.240.0031.0
SURFFR2025-11-20 04:18:53.0800.20880.211.412025-11-20 04:18:57.3110.0400-0.620.4934.8
ISOFR2025-11-20 04:18:53.7600.02210.042.152025-11-20 04:18:59.1100.1414-0.071.7538.8
VINDIV2025-11-20 04:18:55.4480.0200-0.091.982025-11-20 04:19:01.7760.0400-0.321.0349.2
PZZGU2025-11-20 04:18:56.2800.0301-0.072.032025-11-20 04:19:03.9140.04000.141.6453.9
MVIFFR2025-11-20 04:18:57.8730.02000.600.342025-11-20 04:19:05.9630.04000.051.7559.1
STVGU2025-11-20 04:18:57.1800.03310.191.522025-11-20 04:19:04.5200.27670.031.4160.4
OGAGFR2025-11-20 04:18:57.6500.03310.002.082025-11-20 04:19:05.7970.0400-0.091.6963.1
ENRGU2025-11-20 04:18:58.3500.03610.032.032025-11-20 04:19:06.8650.21560.081.4667.7
ESCAFR2025-11-20 04:19:00.1710.0200-0.151.642025-11-20 04:19:12.3060.04001.480.0777.8
RRLGU2025-11-20 04:19:00.6800.0422-0.041.932025-11-20 04:19:09.9930.0400-1.200.1379.8
SAOFFR2025-11-20 04:19:00.7500.0200-0.700.442025-11-20 04:19:17.5300.04004.980.0082.9
BHBGU2025-11-20 04:19:01.8100.04720.201.482025-11-20 04:19:12.3810.0400-0.271.2587.5
MLIGIV2025-11-20 04:19:02.5130.0200-0.690.452025-11-20 04:19:19.1410.04003.690.1592.6
BURYGU2025-11-20 04:19:02.9720.0200-0.061.842025-11-20 04:19:17.3080.04002.040.1092.9
BRDIT2025-11-20 04:19:05.9630.02002.010.092025-11-20 04:19:19.8230.04003.090.1499.1
MGROGU2025-11-20 04:19:03.8300.0200-0.640.512025-11-20 04:19:21.2640.04003.780.13100.9
GBOSGU2025-11-20 04:19:03.9100.05320.041.812025-11-20 04:19:16.3380.04000.301.15101.2
BIGNGU2025-11-20 04:19:04.9750.02000.690.342025-11-20 04:19:20.4220.04003.090.14101.2
OGMOFR2025-11-20 04:19:05.6800.0572-0.021.762025-11-20 04:19:19.8530.04000.141.33109.9
IMIGU2025-11-20 04:19:06.7340.02000.960.142025-11-20 04:19:23.2730.04003.470.17111.2


Local magnitude (ML) calculation results
Station Net Channels Stat. Mag. Wood-And.
Ampl.
Dist. (km) Azimuth
PZZ GUHH1.251.18e-153.954
STV GUHH1.253.72e-260.487
OGAG FRHH1.335.98e-263.1358
ENR GUHH1.479.95e-267.789
ESCA FRHH1.455.07e-277.8124
RRL GUHH1.463.27e-279.812
SAOF FRHH1.484.69e-282.9108
BHB GUHH1.503.98e-287.539
BURY GUHH1.961.09e-192.9122
MGRO GUHH1.897.66e-2100.9101


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.
(°)
ISO FRHHZ3.6697e-66.0170e-73.7411e-71.6069e-77.2295e-81.1155e-51.3740e-69.1954e-81.4503e-838.896
ISO FRHHN4.1511e-66.6924e-74.2734e-71.6496e-78.6900e-81.2429e-51.9561e-61.2008e-71.6337e-838.896
ISO FRHHE3.3732e-65.8793e-73.2844e-71.3027e-76.6965e-81.0512e-51.4699e-69.7407e-81.5432e-838.896
PZZ GUHHZ5.3114e-61.2625e-61.0584e-63.4012e-71.4895e-71.3681e-55.6397e-61.8684e-72.9728e-853.954
PZZ GUHHN4.4646e-61.4069e-61.0565e-64.9677e-72.4565e-71.3351e-55.2181e-64.1868e-73.6914e-853.954
PZZ GUHHE5.3686e-61.4363e-61.1538e-65.0004e-72.1760e-71.3428e-56.6173e-62.9505e-73.3868e-853.954
STV GUHHZ1.9763e-63.9645e-73.3054e-71.3389e-75.5362e-85.5948e-62.3446e-67.3028e-81.0708e-860.487
STV GUHHN2.3678e-64.0296e-72.9248e-71.1824e-75.2949e-87.1714e-61.3713e-68.2538e-81.2463e-860.487
STV GUHHE1.5517e-64.1930e-72.8334e-71.6443e-75.9933e-87.2171e-61.5532e-68.6445e-81.1359e-860.487
OGAG FRHHZ2.7275e-65.3396e-73.6898e-71.5825e-76.5545e-87.4063e-61.7779e-66.8929e-89.8088e-963.1358
OGAG FRHHN1.7672e-63.9787e-73.6890e-71.4650e-77.3227e-83.9965e-62.2884e-68.0467e-81.0144e-863.1358
OGAG FRHHE1.2431e-64.6536e-74.2738e-72.8286e-71.0842e-73.2694e-62.5111e-61.2879e-71.4006e-863.1358
ENR GUHHZ6.3659e-69.0304e-76.5256e-73.9997e-72.5269e-71.7865e-53.8502e-63.5820e-73.9408e-867.789
ENR GUHHN1.2529e-51.7316e-69.6659e-74.0636e-72.1424e-72.9475e-55.6140e-62.7357e-73.7496e-867.789
ENR GUHHE1.1650e-51.2715e-68.0558e-72.4938e-71.0748e-72.3079e-54.6589e-61.4958e-72.9619e-867.789
ESCA FRHHZ1.9120e-64.5434e-72.7894e-78.4140e-84.2794e-84.6290e-61.4321e-65.3843e-89.6495e-977.8124
ESCA FRHHN2.6952e-67.1213e-74.2073e-71.5913e-76.8768e-89.6781e-61.9972e-67.9739e-81.7297e-877.8124
ESCA FRHHE3.0043e-67.5027e-74.4246e-71.8902e-76.9703e-87.4669e-61.7262e-61.1124e-71.7585e-877.8124
RRL GUHHZ1.9104e-63.6993e-72.6702e-71.2313e-75.8401e-88.0176e-61.0127e-66.7670e-88.4865e-979.812
RRL GUHHN1.4906e-63.5998e-73.2512e-71.2614e-75.6336e-84.9213e-61.5425e-67.4240e-81.0049e-879.812
RRL GUHHE1.4600e-63.6872e-73.0773e-71.4533e-75.9522e-84.0977e-61.3653e-68.1349e-88.1864e-979.812
SAOF FRHHZ1.4081e-64.4859e-74.2863e-71.9901e-78.0770e-82.7500e-62.3358e-61.0945e-71.2548e-882.9108
SAOF FRHHN1.3584e-64.4924e-73.8570e-71.5812e-76.1954e-83.0718e-62.0390e-69.3407e-81.3428e-882.9108
SAOF FRHHE1.0404e-63.0621e-73.2632e-71.5144e-75.3739e-83.8755e-62.0040e-68.1137e-89.3290e-982.9108
BHB GUHHZ1.7870e-63.6653e-73.5453e-71.1819e-75.8629e-86.9919e-61.8525e-67.9229e-89.1993e-987.539
BHB GUHHN1.4254e-63.5765e-73.6009e-71.6554e-75.7629e-84.5310e-62.3428e-67.5913e-81.0764e-887.539
BHB GUHHE1.0217e-63.0182e-72.6734e-71.6913e-76.3562e-83.7590e-61.2986e-69.2250e-87.8383e-987.539
BURY GUHHZ2.5048e-64.2943e-73.5596e-71.9607e-79.4672e-88.0876e-62.1240e-61.0937e-71.0945e-892.9122
BURY GUHHN3.9160e-69.3464e-77.5020e-72.8245e-71.1838e-71.2784e-54.1109e-61.7227e-72.5644e-892.9122
BURY GUHHE3.4771e-69.9937e-78.6286e-73.9599e-71.5490e-71.5379e-54.3654e-62.6907e-72.7891e-892.9122
BRD ITHNZ4.1689e-61.3565e-61.2117e-66.2230e-73.1327e-71.0966e-57.0140e-64.2249e-74.3369e-899.1111
BRD ITHNN3.8198e-61.5680e-61.5560e-68.9282e-73.5845e-78.4888e-61.1281e-55.0219e-74.5082e-899.1111
BRD ITHNE5.9542e-61.6955e-61.8375e-69.4351e-73.4923e-71.6712e-59.8126e-64.2242e-75.4869e-899.1111
MGRO GUHHZ1.8082e-65.6300e-73.4587e-71.9708e-78.4332e-82.8425e-61.9493e-61.0422e-71.4151e-8100.9101
MGRO GUHHN1.4037e-65.7978e-74.0461e-71.9746e-71.0786e-73.4925e-63.7116e-61.5930e-71.7852e-8100.9101
MGRO GUHHE1.8515e-65.9100e-74.8242e-72.8905e-71.1060e-72.6548e-62.7447e-61.5690e-71.8324e-8100.9101
GBOS GUHHZ1.2344e-62.6879e-72.1296e-79.1266e-83.8059e-84.1242e-69.5697e-74.4878e-86.6725e-9101.288
GBOS GUHHN1.3333e-64.6503e-72.2129e-71.0833e-74.9299e-82.9856e-61.2298e-65.2658e-86.6712e-9101.288
GBOS GUHHE1.3461e-62.7922e-72.0825e-78.9996e-83.7526e-85.4373e-61.1024e-65.3313e-88.2577e-9101.288
BIGN GUEHZ2.8591e-65.4475e-74.9170e-72.6337e-79.5767e-89.2627e-62.4695e-61.2896e-71.6733e-8101.2112
BIGN GUEHN5.4875e-61.1959e-61.0953e-66.9581e-72.4320e-71.3130e-56.0569e-63.6008e-73.2327e-8101.2112
BIGN GUEHE5.7514e-61.3405e-69.8155e-74.5194e-71.6897e-71.9519e-53.4041e-62.1954e-73.1230e-8101.2112
IMI GUHHZ1.9853e-63.9614e-73.5927e-71.7719e-76.5436e-86.8887e-61.3999e-69.2255e-81.0411e-8111.2108
IMI GUHHN7.2093e-61.9855e-61.4101e-61.2536e-64.5646e-71.8096e-55.2415e-65.7667e-75.0378e-8111.2108
IMI GUHHE4.0237e-61.0493e-67.0761e-75.1147e-72.3238e-71.7170e-53.4156e-62.3906e-72.9022e-8111.2108
*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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