MANUAL Location - Area: Alpi Cozie , magnitude (ML): 0.2
2025-05-12 16:58:30 (UTC)

Regional Seismic Network of Northwestern Italy (Distav, University of Genoa)
Posted on: 2025-05-13 08:36:57

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Earthquake info - Manual location
Event - ID :250512165809
Magnitude (ML) :0.2 +/- 0.1
Origin Time :2025-05-12 16:58:30.911 (UTC)
Location : Latitude: 44.583 N, Longitude: 6.709 E
Area :Alpi Cozie
Depth (km) :5.77
Distances (km) : 24.3 --- Bellino
25.2 --- Acceglio
25.6 --- Pontechianale
27.4 --- Argentera
28.6 --- Casteldelfino
29.5 --- Prazzo
30.5 --- Elva
32.7 --- Canosio
33.4 --- Marmora
34.1 --- Stroppo
36.9 --- Pietraporzio
37.8 --- Crissolo
38.1 --- Sampeyre
38.3 --- Macra
38.9 --- Celle di Macra
39.5 --- Oncino
39.7 --- Sambuco
39.8 --- Claviere
39.9 --- Ostana
41.0 --- Bobbio Pellice

Quality location estimate: Erh: 1.3 km, Erz: 1.5 km, Nf: 12, Gap: 181 °, Rms: 0.14


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.
SURFFR2025-05-12 16:58:34.4000.00600.091.372025-05-12 16:58:36.7600.0471-0.081.4215.1
OGAGFR2025-05-12 16:58:35.8860.0200-0.540.182025-05-12 16:58:39.2370.1002-1.070.0427.4
PZZGU2025-05-12 16:58:37.7000.05320.031.692025-05-12 16:58:42.7100.09720.151.1234.1
RRLGU2025-05-12 16:58:38.5860.0200-0.021.692025-05-12 16:58:43.9900.1123-0.071.2439.0
ISOFR2025-05-12 16:58:40.6300.0200-0.031.612025-05-12 16:58:46.6430.0400-0.680.2252.4
BHBGU2025-05-12 16:58:41.0900.02510.330.252025-05-12 16:58:47.6330.0400-0.101.1752.4


Local magnitude (ML) calculation results
Station Net Channels Stat. Mag. Wood-And.
Ampl.
Dist. (km) Azimuth
OGAG FRHH0.182.25e-227.4330
PZZ GUHH0.424.40e-234.1105
RRL GUHH0.177.59e-339.010
ISO FRHH0.004.17e-352.4148
BHB GUHH0.348.36e-352.457


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 FRHHZ1.4014e-63.1551e-71.7801e-78.3287e-83.1817e-83.0168e-67.5286e-74.5141e-88.0429e-927.4330
OGAG FRHHN1.5701e-62.0268e-71.5618e-76.1295e-82.4151e-83.9276e-68.0049e-73.6280e-85.8257e-927.4330
OGAG FRHHE1.8850e-62.4221e-72.0244e-78.4393e-84.1187e-83.9348e-61.1451e-64.0433e-86.7622e-927.4330
PZZ GUHHZ2.4173e-64.4706e-72.2891e-74.9709e-82.8554e-88.9752e-66.5420e-74.8105e-89.7893e-934.1105
PZZ GUHHN3.1499e-65.8886e-73.6961e-79.5586e-85.3301e-89.4171e-61.2600e-69.6528e-81.6934e-834.1105
PZZ GUHHE2.7304e-64.5653e-72.9500e-78.8377e-83.9316e-86.5457e-61.1999e-66.0974e-81.2106e-834.1105
RRL GUHHZ6.6831e-78.8895e-85.4432e-82.4813e-81.1211e-81.3140e-63.3274e-71.6096e-82.3788e-939.010
RRL GUHHN7.9690e-71.2231e-78.3587e-82.4272e-81.2240e-81.9696e-63.9455e-71.6940e-83.0535e-939.010
RRL GUHHE7.9414e-71.0781e-77.0572e-83.5669e-81.3724e-82.1879e-63.2309e-71.7047e-82.8320e-939.010
ISO FRHHZ6.1884e-77.6447e-83.7402e-89.2756e-95.3990e-91.1755e-61.4718e-71.0469e-81.6883e-952.4148
ISO FRHHN7.2695e-77.6075e-82.9856e-81.2892e-81.2748e-81.2655e-69.5825e-82.2131e-82.6856e-952.4148
ISO FRHHE6.4995e-77.8159e-83.3373e-81.7728e-81.1313e-81.0810e-61.0728e-71.8684e-82.3093e-952.4148
BHB GUHHZ9.5228e-71.5199e-77.6981e-83.0556e-83.0429e-83.5022e-62.6635e-76.5747e-83.5907e-952.457
BHB GUHHN7.4429e-71.0360e-76.6649e-82.6027e-81.7839e-81.8429e-63.5944e-73.6206e-82.5023e-952.457
BHB GUHHE6.1634e-79.3114e-86.2636e-83.3982e-81.5806e-81.9377e-62.8822e-72.9206e-82.4753e-952.457
*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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