MANUAL Location - Area: Alpi Marittime , magnitude (ML): 0.2
2025-08-12 20:43:29 (UTC)

Regional Seismic Network of Northwestern Italy (Distav, University of Genoa)
Posted on: 2025-08-13 14:25:09

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Earthquake info - Manual location
Event - ID :250812204234
Magnitude (ML) :0.2 +/- 0.1
Origin Time :2025-08-12 20:43:29.079 (UTC)
Location : Latitude: 44.388 N, Longitude: 6.972 E
Area :Alpi Marittime
Depth (km) :1.98
Distances (km) : 3.0 --- Argentera
6.8 --- Pietraporzio
9.7 --- Sambuco
9.9 --- Acceglio
11.7 --- Canosio
12.5 --- Marmora
12.6 --- Prazzo
18.1 --- Stroppo
18.2 --- Vinadio
19.2 --- Castelmagno
19.4 --- Elva
19.6 --- Celle di Macra
20.7 --- Macra
21.2 --- Aisone
21.9 --- Bellino
23.9 --- Casteldelfino
24.7 --- Pradleves
25.2 --- San Damiano Macra
26.5 --- Pontechianale
26.9 --- Cartignano

Quality location estimate: Erh: 0.9 km, Erz: 0.4 km, Nf: 24, Gap: 144 °, Rms: 0.25


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.
SURFFR2025-08-12 20:43:32.6900.01000.021.362025-08-12 20:43:35.0100.0661-0.321.1216.5
PZZGU2025-08-12 20:43:33.4700.01200.290.102025-08-12 20:43:36.1690.0782-0.001.2617.8
VINDIV2025-08-12 20:43:33.1180.0200-0.071.272025-08-12 20:43:36.0030.04000.021.3018.4
ISOFR2025-08-12 20:43:33.9700.04320.090.922025-08-12 20:43:36.7000.0902-0.381.1023.6
STVGU2025-08-12 20:43:35.3890.02000.031.322025-08-12 20:43:39.3740.0400-0.211.1332.4
ENRGU2025-08-12 20:43:36.6900.0221-0.031.352025-08-12 20:43:41.3860.0400-0.480.9239.7
BHBGU2025-08-12 20:43:38.9800.0291-0.421.072025-08-12 20:43:46.6460.20050.010.9654.9
TURFFR2025-08-12 20:43:39.5800.0783-0.421.052025-08-12 20:43:47.0260.2366-0.660.5956.8
RRLGU2025-08-12 20:43:40.3280.0200-0.470.972025-08-12 20:43:48.6790.0400-0.420.9961.2
ESCAFR2025-08-12 20:43:42.1060.0200-0.211.182025-08-12 20:43:50.8200.2206-0.780.4369.7
GBOSGU2025-08-12 20:43:41.9040.0200-0.141.212025-08-12 20:43:50.2200.4749-0.600.6170.9
IMIGU2025-08-12 20:43:45.0100.0200-0.421.022025-08-12 20:43:56.3700.3768-0.350.7890.6


Local magnitude (ML) calculation results
Station Net Channels Stat. Mag. Wood-And.
Ampl.
Dist. (km) Azimuth
PZZ GUHH0.066.36e-217.841
ENR GUHH0.221.67e-239.7116
BHB GUHH0.296.77e-354.925
TURF FRHH0.104.43e-356.8144
RRL GUHH0.022.12e-361.2346
ESCA FRHH0.203.57e-369.7152
IMI GUHH0.394.21e-390.6126


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.
(°)
PZZ GUHHZ1.0642e-51.3548e-65.3337e-71.1241e-76.8297e-82.2088e-51.7078e-61.2920e-72.8817e-817.841
PZZ GUHHN8.3150e-61.1129e-64.6327e-71.2666e-77.2066e-82.0881e-51.9719e-61.3190e-72.6918e-817.841
PZZ GUHHE1.3178e-51.6883e-66.0790e-71.5523e-78.5429e-82.1376e-52.0500e-61.6430e-73.9213e-817.841
ISO FRHHZ2.7769e-63.0512e-79.1535e-82.1409e-81.1644e-84.1898e-63.6238e-72.0576e-85.5754e-923.6165
ISO FRHHN2.1933e-63.4680e-71.1566e-74.2228e-82.6366e-84.9305e-64.6823e-74.0433e-86.7724e-923.6165
ISO FRHHE2.7915e-63.7039e-71.2724e-75.0909e-82.8635e-83.6829e-66.3789e-74.4472e-87.3430e-923.6165
STV GUHHZ2.5043e-62.6506e-75.2338e-82.2576e-81.4921e-81.1899e-62.0578e-72.6386e-82.6648e-932.4119
STV GUHHN1.4580e-61.5864e-74.6246e-81.5853e-87.3260e-91.8080e-62.0958e-71.3697e-82.8069e-932.4119
STV GUHHE1.1244e-61.4414e-74.7761e-81.4568e-87.7346e-91.7056e-62.0806e-71.2014e-82.7287e-932.4119
ENR GUHHZ2.5885e-62.9091e-76.8491e-82.5518e-81.3858e-82.8115e-63.2420e-72.3052e-85.0424e-939.7116
ENR GUHHN6.4858e-65.3792e-71.0932e-73.2707e-81.9338e-85.8352e-66.7373e-73.5622e-81.0922e-839.7116
ENR GUHHE5.7463e-64.3664e-77.6348e-82.7033e-81.4422e-83.5272e-63.4857e-72.9713e-87.7498e-939.7116
BHB GUHHZ8.9463e-71.2039e-74.9427e-81.3739e-87.1194e-91.5790e-62.2188e-71.2018e-82.2531e-954.925
BHB GUHHN5.0806e-78.0345e-86.0739e-82.5031e-81.0095e-81.3143e-63.0247e-71.4261e-81.8243e-954.925
BHB GUHHE6.4284e-78.8896e-84.7741e-81.5969e-88.2162e-99.7611e-72.0956e-71.2846e-82.3786e-954.925
TURF FRHHZ1.8695e-72.7030e-82.1175e-89.4960e-96.0965e-94.1884e-71.3610e-77.5174e-98.0961e-1056.8144
TURF FRHHN2.5332e-74.0567e-83.0949e-81.3110e-88.3843e-99.0808e-71.8990e-71.1176e-81.0952e-956.8144
TURF FRHHE2.1857e-74.8725e-83.7758e-81.8115e-88.6898e-96.8246e-71.9727e-71.2383e-81.1531e-956.8144
RRL GUHHZ1.5577e-71.6552e-81.0602e-87.3614e-95.7069e-92.5518e-77.2706e-87.0932e-95.7032e-1061.2346
RRL GUHHN2.2661e-72.6597e-81.7795e-87.8739e-95.1532e-94.4656e-71.2079e-76.1517e-97.2023e-1061.2346
RRL GUHHE1.5528e-72.1858e-81.5654e-88.7616e-95.0327e-95.3220e-76.2242e-85.1904e-95.4872e-1061.2346
ESCA FRHHZ2.2483e-73.4487e-81.7502e-87.4913e-95.3551e-94.0358e-78.4436e-88.0998e-97.3930e-1069.7152
ESCA FRHHN2.9744e-75.2597e-83.0727e-81.5455e-81.7721e-87.2261e-71.5027e-72.6153e-81.8857e-969.7152
ESCA FRHHE2.7461e-74.6870e-83.4264e-81.2653e-88.5071e-96.3727e-72.3760e-71.2733e-81.0706e-969.7152
GBOS GUHHZ2.3907e-74.7429e-82.6587e-89.5898e-97.6889e-98.7136e-78.4517e-88.1355e-91.1217e-970.9103
GBOS GUHHN6.1939e-71.2044e-76.3699e-83.8712e-81.7568e-81.3656e-63.4186e-71.9790e-82.4105e-970.9103
GBOS GUHHE2.6954e-75.2941e-82.5472e-87.6680e-93.9178e-91.0303e-66.9675e-85.3205e-91.2361e-970.9103
IMI GUHHZ2.3839e-72.6037e-81.7729e-81.1695e-89.6671e-95.0660e-77.5184e-81.2124e-89.9579e-1090.6126
IMI GUHHN8.9300e-76.3449e-84.1482e-81.7259e-81.2313e-89.7639e-71.8289e-72.2041e-82.0185e-990.6126
IMI GUHHE3.0639e-74.2087e-82.6444e-81.1237e-88.6958e-96.4091e-71.2040e-71.2951e-81.5028e-990.6126
*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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