MANUAL Location - Area: Alpi Marittime , magnitude (ML): 0.5
2025-10-20 08:47:31 (UTC)

Regional Seismic Network of Northwestern Italy (Distav, University of Genoa)
Posted on: 2025-10-20 13:48:33

RSNI Logo

Earthquake info - Manual location
Event - ID :251020084705
Magnitude (ML) :0.5 +/- 0.2
Origin Time :2025-10-20 08:47:31.669 (UTC)
Location : Latitude: 44.276 N, Longitude: 7.480 E
Area :Alpi Marittime
Depth (km) :4.23
Distances (km) : 2.0 --- Roaschia
3.3 --- Robilante
4.4 --- Roccavione
5.5 --- Vernante
6.3 --- Borgo San Dalmazzo
6.6 --- Valdieri
7.6 --- Entracque
8.0 --- Roccasparvera
8.3 --- Boves
8.8 --- Moiola
8.9 --- Gaiola
9.4 --- Vignolo
10.6 --- Rittana
11.0 --- Valloriate
11.3 --- Limone Piemonte
12.0 --- Cervasca
12.6 --- Peveragno
12.7 --- Cuneo
12.8 --- Bernezzo
15.2 --- Demonte

Quality location estimate: Erh: 1 km, Erz: 1 km, Nf: 20, Gap: 119 °, 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.
ENRGU2025-10-20 08:47:33.4000.0030-0.201.032025-10-20 08:47:34.3680.1002-0.590.528.9
STVGU2025-10-20 08:47:34.4900.00700.011.902025-10-20 08:47:36.3110.1444-0.091.5013.7
GBOSGU2025-10-20 08:47:37.3300.01500.021.852025-10-20 08:47:41.2300.10030.150.9529.4
SAOFFR2025-10-20 08:47:38.1670.0200-0.031.872025-10-20 08:47:42.8280.0400-0.011.6633.0
TURFFR2025-10-20 08:47:38.3470.0200-0.211.062025-10-20 08:47:43.6230.04000.121.1034.5
ISOFR2025-10-20 08:47:39.2820.02000.770.202025-10-20 08:47:43.7430.04000.600.1636.1
MGROGU2025-10-20 08:47:38.4300.0160-0.590.522025-10-20 08:47:43.5100.1143-0.740.3137.3
PZZGU2025-10-20 08:47:39.2340.0200-0.051.812025-10-20 08:47:44.5230.0400-0.091.5639.1
PCPGU2025-10-20 08:47:48.5300.18081.000.172025-10-20 08:47:59.8590.04001.340.0789.7


Local magnitude (ML) calculation results
Station Net Channels Stat. Mag. Wood-And.
Ampl.
Dist. (km) Azimuth
ENR GUHH0.646.69e-18.9223
STV GUHH0.307.04e-213.7255
GBOS GUHH0.612.69e-229.497
TURF FRHH0.261.72e-234.5192
MGRO GUHH0.643.55e-237.3135
PZZ GUHH0.171.86e-239.1312
PCP GUHH0.808.91e-389.770


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.
(°)
ENR GUHHZ1.2461e-53.5602e-63.2403e-61.6987e-61.0877e-62.9052e-52.0743e-51.5872e-61.0897e-78.9223
ENR GUHHN2.0418e-56.5110e-65.0595e-62.1423e-61.1684e-64.9843e-52.6902e-51.3916e-61.9352e-78.9223
ENR GUHHE3.3398e-56.3041e-65.1784e-62.2435e-67.6556e-71.0608e-42.7461e-51.0833e-61.6911e-78.9223
STV GUHHZ1.8082e-65.7430e-74.6177e-72.1140e-71.0184e-74.9611e-62.4365e-61.5739e-71.4436e-813.7255
STV GUHHN1.4553e-63.3333e-73.4585e-71.5738e-76.0290e-83.9375e-62.2193e-67.5438e-89.5893e-913.7255
STV GUHHE1.6112e-66.1718e-75.1480e-72.3770e-71.1806e-73.4093e-63.0908e-61.6721e-71.7289e-813.7255
GBOS GUHHZ1.3751e-62.5872e-72.4401e-79.0018e-83.6850e-83.0076e-61.3655e-65.3914e-86.7259e-929.497
GBOS GUHHN2.7171e-64.6912e-72.6450e-71.1569e-74.8311e-84.4668e-62.0521e-66.1277e-89.4191e-929.497
GBOS GUHHE1.9795e-62.9201e-72.5368e-79.7722e-83.8608e-85.8952e-61.2888e-65.1860e-88.1200e-929.497
SAOF FRHHZ4.2995e-71.4389e-71.1898e-76.4198e-83.4777e-88.0835e-77.0789e-74.6941e-85.0609e-933.0169
SAOF FRHHN3.6118e-71.0917e-71.0249e-76.2864e-82.5973e-87.0069e-74.4362e-73.2906e-83.0014e-933.0169
SAOF FRHHE3.7627e-71.0217e-71.1331e-78.4834e-84.5070e-87.4422e-79.3643e-75.1993e-84.2663e-933.0169
TURF FRHHZ9.0525e-71.7013e-71.2828e-71.3032e-71.1090e-77.3613e-76.4910e-71.9818e-71.1532e-834.5192
TURF FRHHN1.6987e-61.9422e-71.3261e-77.4760e-83.2257e-81.2761e-67.0410e-73.9583e-83.9478e-934.5192
TURF FRHHE8.7830e-71.4950e-71.4198e-78.1128e-82.8976e-81.5242e-61.0867e-64.2778e-84.5463e-934.5192
ISO FRHHZ2.1857e-75.1607e-85.6917e-82.7832e-81.2474e-83.8741e-73.8881e-71.7832e-81.6621e-936.1254
ISO FRHHN3.4216e-71.2507e-79.4532e-84.0501e-83.0567e-88.6342e-77.3392e-74.5451e-86.4445e-936.1254
ISO FRHHE2.6254e-77.5957e-86.2722e-82.5749e-81.1471e-85.0338e-73.2149e-71.6850e-81.7485e-936.1254
MGRO GUHHZ4.3079e-71.3704e-71.3739e-79.4997e-83.3812e-88.3157e-76.5264e-74.2160e-84.4512e-937.3135
MGRO GUHHN6.5734e-72.7105e-72.6082e-71.3247e-75.2591e-89.8923e-72.4119e-67.1001e-87.9593e-937.3135
MGRO GUHHE5.2359e-71.4323e-71.7420e-78.2796e-82.9714e-81.0954e-61.2786e-63.8704e-85.3175e-937.3135
PZZ GUHHZ5.3930e-71.9138e-71.7798e-76.4139e-82.4620e-81.1245e-61.3589e-63.7217e-85.1011e-939.1312
PZZ GUHHN7.3116e-71.8369e-71.8677e-77.3500e-83.6533e-81.4676e-61.2693e-65.6871e-85.0802e-939.1312
PZZ GUHHE6.4769e-71.8681e-71.8001e-77.8581e-83.6374e-81.1068e-69.7023e-74.7638e-85.6563e-939.1312
PCP GUHHZ4.4550e-77.5419e-87.3233e-82.9744e-81.6975e-85.7611e-74.5512e-72.5016e-83.2216e-989.770
PCP GUHHN2.5213e-77.4622e-87.8443e-83.8135e-81.9395e-85.4469e-75.2557e-72.5189e-82.3585e-989.770
PCP GUHHE3.0754e-77.5794e-88.3581e-82.9323e-81.6853e-85.1622e-75.5648e-72.7713e-82.2128e-989.770
*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)

rsni