MANUAL Location - Area: Alpi Cozie , magnitude (ML): 0.8
2025-08-25 04:29:46 (UTC)

Regional Seismic Network of Northwestern Italy (Distav, University of Genoa)
Posted on: 2025-08-25 08:37:38

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Earthquake info - Manual location
Event - ID :250825042808
Magnitude (ML) :0.8 +/- 0.2
Origin Time :2025-08-25 04:29:46.592 (UTC)
Location : Latitude: 44.912 N, Longitude: 6.774 E
Area :Alpi Cozie
Depth (km) :4.48
Distances (km) : 3.7 --- Claviere
4.8 --- Cesana Torinese
7.6 --- Sauze di Cesana
9.7 --- Sestriere
14.4 --- Oulx
14.6 --- Sauze d Oulx
17.3 --- Pragelato
19.4 --- Bardonecchia
20.0 --- Salbertrand
21.7 --- Prali
22.1 --- Salza di Pinerolo
22.8 --- Massello
24.1 --- Exilles
25.2 --- Usseaux
25.9 --- Fenestrelle
27.0 --- Perrero
28.6 --- Chiomonte
29.4 --- Bobbio Pellice
30.0 --- Roure
30.6 --- Gravere

Quality location estimate: Erh: 1 km, Erz: 0.7 km, Nf: 24, Gap: 115 °, 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.
RRLGU2025-08-25 04:29:48.6600.00300.360.992025-08-25 04:29:49.4800.0180-0.001.776.8
OGAGFR2025-08-25 04:29:51.4800.0120-0.001.772025-08-25 04:29:54.2190.0701-0.670.2123.8
OGMOFR2025-08-25 04:29:53.8300.02000.341.052025-08-25 04:29:58.1580.04000.001.5834.0
RSPGU2025-08-25 04:29:55.8100.02410.181.312025-08-25 04:30:01.6200.1615-0.181.0347.0
SURFFR2025-08-25 04:29:55.8920.02000.131.432025-08-25 04:30:02.2060.0400-0.161.0948.2
PZZGU2025-08-25 04:29:56.3800.0361-0.071.452025-08-25 04:30:02.5000.2226-0.990.1752.8
LSDGU2025-08-25 04:29:59.1700.18380.111.372025-08-25 04:30:06.8600.2005-0.690.3367.4
ISOFR2025-08-25 04:30:02.6520.02000.940.102025-08-25 04:30:12.5000.04000.181.2584.0
ENRGU2025-08-25 04:30:02.9390.02000.380.942025-08-25 04:30:13.9400.04000.111.2691.6
MRGEIV2025-08-25 04:30:04.2110.0200-0.161.082025-08-25 04:30:16.7480.04000.281.0998.1
CIROGU2025-08-25 04:30:04.7700.02000.031.452025-08-25 04:30:15.7100.4569-1.370.1398.9
GBOSGU2025-08-25 04:30:06.3100.08040.640.422025-08-25 04:30:18.9900.61890.100.73112.7


Local magnitude (ML) calculation results
Station Net Channels Stat. Mag. Wood-And.
Ampl.
Dist. (km) Azimuth
RRL GUHH0.837.98e-16.850
OGAG FRHH0.475.73e-223.8233
RSP GUHH0.572.05e-247.056
PZZ GUHH0.865.05e-252.8149
LSD GUHH1.062.79e-267.425
ENR GUHH0.861.23e-291.6146
MRGE IVHH0.704.48e-398.113
CIRO GUHH1.056.25e-398.939


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.
(°)
RRL GUHHZ7.1897e-57.5332e-61.8574e-69.2032e-74.7684e-77.0188e-59.8999e-68.3839e-71.4846e-76.850
RRL GUHHN7.8334e-59.5131e-63.9270e-61.0100e-66.2990e-71.4980e-41.4442e-51.1636e-62.2510e-76.850
RRL GUHHE6.8152e-51.2015e-55.2127e-61.8850e-69.2696e-71.7825e-43.2103e-51.4331e-62.3599e-76.850
OGAG FRHHZ3.1272e-66.2372e-73.6012e-71.0966e-75.3690e-86.3996e-61.5937e-67.8462e-81.4469e-823.8233
OGAG FRHHN2.3311e-66.1319e-74.3149e-71.8618e-78.2247e-86.3285e-61.7300e-61.1282e-71.7013e-823.8233
OGAG FRHHE2.1485e-64.3240e-73.4760e-71.1317e-75.9625e-84.8665e-61.7448e-69.3011e-81.2838e-823.8233
RSP GUHHZ4.6744e-64.4288e-71.1263e-73.0872e-81.5545e-86.7013e-65.1728e-73.3635e-88.4111e-947.056
RSP GUHHN3.4538e-64.5767e-71.5898e-74.6242e-82.0317e-88.1745e-65.9266e-73.8203e-89.4648e-947.056
RSP GUHHE4.2133e-64.2963e-71.7228e-74.2359e-82.1574e-81.2417e-55.7033e-73.9183e-88.5838e-947.056
PZZ GUHHZ2.8950e-64.4898e-73.9194e-71.0424e-75.5996e-87.7244e-62.0591e-68.3023e-81.2948e-852.8149
PZZ GUHHN2.6232e-64.7167e-73.9400e-78.6698e-83.9630e-89.3496e-61.7311e-65.5484e-81.0616e-852.8149
PZZ GUHHE2.4081e-65.7222e-74.9325e-71.3351e-76.8711e-86.2648e-63.9038e-61.0294e-71.6513e-852.8149
LSD GUHHZ1.8866e-63.0093e-71.6293e-74.1377e-82.1257e-86.6849e-69.7726e-73.2901e-86.9390e-967.425
LSD GUHHN2.7004e-62.7368e-71.2621e-73.7423e-81.8104e-84.5474e-67.2294e-72.7385e-85.4631e-967.425
LSD GUHHE3.7168e-63.8824e-72.1972e-77.1379e-83.3574e-86.9796e-61.4600e-65.3005e-81.0103e-867.425
ISO FRHHZ2.1390e-72.8496e-81.7588e-84.9661e-93.7692e-94.0929e-76.7886e-86.9830e-97.7334e-1084.0165
ISO FRHHN1.9617e-72.8428e-81.4342e-84.5727e-93.9242e-94.8921e-74.6343e-87.7135e-96.6968e-1084.0165
ISO FRHHE2.8004e-73.1027e-81.6491e-86.4983e-93.6198e-95.0449e-76.6425e-85.9429e-96.8028e-1084.0165
ENR GUHHZ1.1307e-61.4276e-75.8756e-82.3305e-81.2917e-82.2043e-61.9825e-71.8606e-82.5853e-991.6146
ENR GUHHN2.7768e-62.5056e-78.6592e-83.1072e-81.8713e-84.1080e-65.2396e-72.3993e-84.5270e-991.6146
ENR GUHHE2.4577e-62.3703e-79.7055e-82.9681e-81.6476e-83.4030e-63.3353e-73.1832e-86.0484e-991.6146
MRGE IVHHZ4.5976e-74.6311e-82.5345e-81.4095e-85.5768e-95.8418e-71.3822e-77.8820e-99.9924e-1098.113
MRGE IVHHN6.6311e-76.5203e-83.4104e-82.4121e-81.2509e-81.2612e-61.7807e-71.6274e-81.9305e-998.113
MRGE IVHHE6.4054e-76.4585e-82.6976e-81.6133e-89.2112e-96.1214e-71.2348e-71.1102e-81.3650e-998.113
CIRO GUHHZ6.7638e-78.4665e-85.6831e-81.3960e-87.0395e-91.7448e-62.7984e-71.0158e-81.9180e-998.939
CIRO GUHHN6.1507e-78.8070e-85.0100e-81.8478e-87.3226e-91.7351e-62.2171e-71.0956e-81.9745e-998.939
CIRO GUHHE9.3274e-71.0447e-76.1221e-81.8709e-88.0631e-92.1191e-63.4876e-71.0956e-82.5483e-998.939
GBOS GUHHZ3.2777e-76.1328e-84.5452e-81.4540e-89.5716e-98.1918e-72.3053e-71.3622e-81.3087e-9112.7131
GBOS GUHHN1.0067e-61.6407e-71.3492e-71.1363e-76.9781e-81.6172e-67.1212e-79.3935e-87.2740e-9112.7131
GBOS GUHHE2.7874e-74.7121e-83.3972e-81.4123e-88.6119e-98.0766e-71.9619e-71.1506e-81.2853e-9112.7131
*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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