MANUAL Location - Area: Alpi Cozie , magnitude (ML): 0.9
2025-09-30 12:54:54 (UTC)

Regional Seismic Network of Northwestern Italy (Distav, University of Genoa)
Posted on: 2025-10-01 09:56:34

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Earthquake info - Manual location
Event - ID :250930125341
Magnitude (ML) :0.9 +/- 0.2
Origin Time :2025-09-30 12:54:54.596 (UTC)
Location : Latitude: 44.587 N, Longitude: 6.693 E
Area :Alpi Cozie
Depth (km) :4.88
Distances (km) : 25.6 --- Bellino
26.5 --- Acceglio
26.8 --- Pontechianale
28.6 --- Argentera
29.8 --- Casteldelfino
30.8 --- Prazzo
31.8 --- Elva
34.0 --- Canosio
34.8 --- Marmora
35.4 --- Stroppo
38.1 --- Pietraporzio
38.8 --- Crissolo
39.3 --- Sampeyre
39.5 --- Claviere
39.6 --- Macra
40.2 --- Celle di Macra
40.6 --- Oncino
40.9 --- Sambuco
40.9 --- Ostana
41.5 --- Cesana Torinese

Quality location estimate: Erh: 0.8 km, Erz: 0.6 km, Nf: 30, Gap: 183 °, Rms: 0.20


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.
SURFFR2025-09-30 12:54:58.3500.01800.211.182025-09-30 12:55:00.7500.0521-0.031.4615.9
OGAGFR2025-09-30 12:54:59.9200.0231-0.021.502025-09-30 12:55:03.3800.0782-0.320.6426.2
PZZGU2025-09-30 12:55:01.6200.0251-0.011.512025-09-30 12:55:06.6360.2176-0.081.1135.2
RRLGU2025-09-30 12:55:02.4000.05820.101.482025-09-30 12:55:07.8000.11530.071.3338.6
VINDIV2025-09-30 12:55:02.8650.0200-1.130.132025-09-30 12:55:09.4540.0400-1.130.1349.3
BHBGU2025-09-30 12:55:04.9100.03310.241.072025-09-30 12:55:11.3750.2897-0.410.6453.1
ISOFR2025-09-30 12:55:04.7300.03210.131.422025-09-30 12:55:10.9740.3197-0.490.5553.3
STVGU2025-09-30 12:55:06.1580.02000.131.402025-09-30 12:55:13.7600.2807-0.230.8463.2
ENRGU2025-09-30 12:55:07.1630.0200-0.031.382025-09-30 12:55:16.0980.04000.091.2270.2
RSPGU2025-09-30 12:55:08.4640.0200-0.240.862025-09-30 12:55:18.7440.04000.091.1677.2
TURFFR2025-09-30 12:55:10.8730.06330.290.922025-09-30 12:55:21.5900.2647-0.270.7888.0
SAOFFR2025-09-30 12:55:12.1600.05320.251.022025-09-30 12:55:23.4200.2877-0.580.4895.7
GBOSGU2025-09-30 12:55:11.8160.0200-0.121.162025-09-30 12:55:24.5500.04000.550.4098.9
ESCAFR2025-09-30 12:55:12.6030.0200-0.171.052025-09-30 12:55:25.5200.0400-0.021.04100.2
LSDGU2025-09-30 12:55:13.3020.02000.201.142025-09-30 12:55:26.0030.0400-0.051.02103.2


Local magnitude (ML) calculation results
Station Net Channels Stat. Mag. Wood-And.
Ampl.
Dist. (km) Azimuth
OGAG FRHH0.801.02e-126.2331
PZZ GUHH0.941.35e-135.2105
RRL GUHH0.803.25e-238.612
BHB GUHH0.882.79e-253.158
ISO FRHH0.431.08e-253.3148
STV GUHH0.811.24e-263.2127
ENR GUHH1.033.32e-270.2124
RSP GUHH0.881.47e-277.236
TURF FRHH0.991.33e-288.0141
SAOF FRHH0.919.04e-395.7134
GBOS GUHH1.281.00e-298.9112
ESCA FRHH1.021.05e-2100.2147
LSD GUHH1.041.03e-2103.219


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.
(°)
OGAG FRHHZ5.1594e-61.1467e-66.4809e-72.8368e-71.1684e-71.0488e-52.6484e-61.6143e-72.8360e-826.2331
OGAG FRHHN6.3258e-61.0181e-66.4856e-72.0752e-78.2937e-82.7911e-52.4216e-61.2427e-72.1756e-826.2331
OGAG FRHHE7.8182e-61.5015e-69.1660e-72.9011e-71.4941e-72.0880e-54.8760e-61.8932e-73.7994e-826.2331
PZZ GUHHZ7.1424e-61.3014e-67.2594e-71.7564e-78.4435e-82.1830e-52.5082e-61.2990e-72.8726e-835.2105
PZZ GUHHN7.6784e-62.0220e-61.1205e-63.2180e-71.7550e-71.9167e-53.9466e-63.0151e-75.2041e-835.2105
PZZ GUHHE8.0778e-61.7891e-69.4273e-72.6868e-71.3566e-72.5073e-53.2258e-61.9264e-73.6315e-835.2105
RRL GUHHZ2.0086e-63.0035e-71.9491e-71.0681e-73.8373e-85.3285e-61.2366e-66.3467e-88.3882e-938.612
RRL GUHHN2.1112e-64.0896e-73.3734e-71.0179e-74.1060e-87.4626e-61.5176e-66.2230e-81.1042e-838.612
RRL GUHHE3.0289e-64.3650e-72.5693e-71.4064e-75.4138e-88.1260e-61.0685e-66.5717e-89.9184e-938.612
BHB GUHHZ3.1318e-64.4466e-72.5873e-77.1904e-83.1635e-81.0941e-51.0464e-65.1666e-89.6491e-953.158
BHB GUHHN3.3222e-64.0730e-72.6986e-77.9859e-84.1030e-87.0829e-61.4604e-65.9592e-89.9628e-953.158
BHB GUHHE2.7228e-63.0133e-71.5729e-75.0000e-82.0627e-85.1124e-68.2444e-73.4177e-87.1268e-953.158
ISO FRHHZ1.9032e-62.1060e-71.2108e-72.9092e-81.4819e-83.9480e-63.4346e-72.2483e-84.5085e-953.3148
ISO FRHHN1.7612e-62.1283e-79.3217e-83.0439e-81.4407e-83.8766e-62.3979e-72.2817e-84.3526e-953.3148
ISO FRHHE1.5496e-62.2630e-71.0614e-73.7647e-81.5705e-83.7827e-63.8768e-72.4553e-84.9182e-953.3148
STV GUHHZ1.6837e-61.8743e-71.3164e-74.1829e-81.7821e-83.3606e-65.9523e-72.2726e-83.8650e-963.2127
STV GUHHN1.4725e-61.9585e-71.0658e-73.5154e-81.7579e-83.2121e-64.7373e-72.5181e-84.2982e-963.2127
STV GUHHE1.4038e-62.0528e-71.0873e-73.0710e-81.5488e-82.8158e-64.5204e-72.5229e-84.6328e-963.2127
ENR GUHHZ2.7456e-65.0554e-72.1746e-76.5429e-83.1389e-86.5811e-65.0334e-75.0535e-81.0991e-870.2124
ENR GUHHN5.6910e-66.5459e-72.6374e-77.6527e-84.0475e-81.0396e-59.7168e-76.4732e-81.4433e-870.2124
ENR GUHHE5.4840e-66.4587e-72.9940e-76.9993e-83.8548e-81.3082e-59.0092e-76.1953e-81.2731e-870.2124
RSP GUHHZ4.2031e-62.8824e-71.2202e-75.7767e-82.3117e-83.1613e-66.2312e-72.9830e-85.1953e-977.236
RSP GUHHN1.3094e-57.5604e-71.4773e-75.8847e-82.1853e-84.2439e-64.8239e-74.9857e-81.4050e-877.236
RSP GUHHE1.9525e-62.6849e-71.5097e-74.2173e-81.9360e-86.3538e-66.0634e-72.8752e-85.8891e-977.236
TURF FRHHZ6.4018e-78.4381e-87.2456e-83.1584e-81.3508e-81.4492e-62.7927e-71.8523e-82.1034e-988.0141
TURF FRHHN7.5781e-71.4624e-71.0511e-73.8623e-82.3369e-82.7183e-63.8754e-73.8106e-83.9592e-988.0141
TURF FRHHE6.5103e-71.2900e-79.8254e-86.6393e-82.5112e-82.0005e-64.0927e-73.5394e-83.4340e-988.0141
SAOF FRHHZ4.0282e-71.2170e-79.5097e-83.7938e-81.9490e-88.8964e-78.6241e-72.6610e-83.2995e-995.7134
SAOF FRHHN3.4355e-78.0607e-86.8476e-82.9496e-81.3113e-87.8684e-75.6279e-71.9078e-81.9244e-995.7134
SAOF FRHHE3.3732e-78.6832e-88.2257e-83.1174e-81.3889e-81.0044e-66.0244e-72.0634e-82.6967e-995.7134
GBOS GUHHZ4.5733e-78.8944e-86.9727e-82.4993e-81.0247e-81.6004e-63.4217e-71.3171e-82.2439e-998.9112
GBOS GUHHN8.2164e-71.5933e-79.0054e-84.7723e-82.7101e-81.4828e-64.0874e-73.4057e-84.7654e-998.9112
GBOS GUHHE6.6674e-71.2681e-78.6899e-83.0106e-81.3336e-81.5204e-66.0069e-72.0442e-82.8277e-998.9112
ESCA FRHHZ8.9323e-78.3991e-86.0772e-82.0262e-88.9445e-91.2961e-62.9454e-71.2082e-82.0650e-9100.2147
ESCA FRHHN6.2106e-71.0219e-78.0089e-83.2228e-81.3797e-81.8868e-64.5373e-71.9767e-82.7311e-9100.2147
ESCA FRHHE5.9757e-71.2811e-71.0290e-73.4040e-81.7757e-81.5022e-66.2018e-72.5993e-83.1396e-9100.2147
LSD GUHHZ5.2104e-79.2164e-88.2733e-84.2861e-81.5281e-81.5858e-63.9055e-71.8854e-82.5796e-9103.219
LSD GUHHN7.2185e-71.1883e-79.0727e-83.8155e-81.4284e-81.9247e-64.4007e-72.0505e-83.1697e-9103.219
LSD GUHHE8.4334e-71.4633e-71.0538e-73.4378e-81.6954e-81.9731e-67.8657e-72.2814e-83.2644e-9103.219
*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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