MANUAL Location - Area: Versilia , magnitude (ML): -0.1
2025-08-10 05:49:01 (UTC)

Regional Seismic Network of Northwestern Italy (Distav, University of Genoa)
Posted on: 2025-08-11 09:11:25

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Earthquake info - Manual location
Event - ID :250810054837
Magnitude (ML) :-0.1 +/- 0.1
Origin Time :2025-08-10 05:49:01.909 (UTC)
Location : Latitude: 43.939 N, Longitude: 10.243 E
Area :Versilia
Depth (km) :7.46
Distances (km) : 2.2 --- Pietrasanta
4.9 --- Camaiore
6.3 --- Forte dei Marmi
6.4 --- Seravezza
7.6 --- Viareggio
7.8 --- Stazzema
10.4 --- Montignoso
10.5 --- Massarosa
13.6 --- Massa
13.9 --- Pescaglia
16.2 --- Fabbriche di Vallico
16.9 --- Vergemoli
18.9 --- Carrara
19.8 --- Vagli Sotto
20.5 --- Molazzana
20.5 --- Gallicano
20.9 --- Vecchiano
21.3 --- Careggine
23.1 --- Ortonovo
23.3 --- Castelnuovo di Garfagnana

Quality location estimate: Erh: 1.7 km, Erz: 0.7 km, Nf: 16, Gap: 155 °, Rms: 0.18


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.
CMEIT2025-08-10 05:49:04.1600.02000.032.222025-08-10 05:49:05.7360.0400-0.032.239.3
MAIMGU2025-08-10 05:49:06.6000.01200.210.492025-08-10 05:49:09.7300.06610.011.9921.5
CARDGU2025-08-10 05:49:06.4870.18480.330.762025-08-10 05:49:09.6870.04000.370.3422.8
EQUIGU2025-08-10 05:49:06.1710.0200-0.780.312025-08-10 05:49:08.6770.0400-1.980.0027.3
VLCMN2025-08-10 05:49:07.0500.01400.002.382025-08-10 05:49:10.2500.1263-0.620.2828.1
SARMGU2025-08-10 05:49:07.5000.0733-0.200.692025-08-10 05:49:11.0900.2476-0.930.2531.2
PIIIV2025-08-10 05:49:08.4860.0200-0.022.252025-08-10 05:49:13.4030.0400-0.041.8033.9
PLMAIV2025-08-10 05:49:06.6750.0200-1.570.012025-08-10 05:49:09.9470.0400-2.970.0034.3


Local magnitude (ML) calculation results
Station Net Channels Stat. Mag. Wood-And.
Ampl.
Dist. (km) Azimuth
CME ITHN0.081.25e-19.370
MAIM GUHH-0.012.02e-221.598
CARD GUHH0.132.83e-222.863
EQUI GUHH-0.131.10e-227.3344
VLC MNHH-0.088.30e-328.125
SARM GUEH-0.208.85e-331.225
PII IVHH-0.324.66e-333.9137
PLMA IVHH0.051.05e-234.3292


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.
(°)
CME ITHNZ1.1586e-59.5783e-73.9536e-72.3881e-71.6502e-71.0352e-52.3197e-62.2899e-71.8961e-89.370
CME ITHNN1.3205e-51.5806e-66.7109e-73.4646e-71.9193e-71.6983e-53.4829e-62.5056e-73.8730e-89.370
CME ITHNE1.8883e-52.1919e-68.7559e-72.9762e-71.4309e-73.0260e-54.1296e-62.7310e-75.0396e-89.370
MAIM GUHHZ1.3087e-61.3375e-77.6292e-82.2658e-81.2051e-81.8629e-63.1073e-72.1709e-83.7796e-921.598
MAIM GUHHN2.1575e-62.6985e-71.1126e-73.4353e-81.7231e-83.9782e-64.7215e-73.1685e-86.6669e-921.598
MAIM GUHHE2.1282e-64.2970e-71.8566e-75.9008e-83.2431e-85.3236e-64.3826e-74.5879e-89.7846e-921.598
CARD GUHHZ3.7676e-64.2846e-78.9635e-83.0859e-82.0859e-85.5910e-64.3171e-73.8834e-88.6204e-922.863
CARD GUHHN6.4939e-67.8156e-72.6288e-75.5713e-82.7989e-88.2121e-67.7502e-75.7045e-81.5103e-822.863
CARD GUHHE4.2747e-65.6965e-72.0715e-76.0555e-83.4425e-81.0268e-57.3661e-75.4132e-81.2190e-822.863
EQUI GUHHZ2.4698e-62.8603e-78.5096e-83.9231e-82.4865e-82.8554e-63.2543e-73.4259e-86.1853e-927.3344
EQUI GUHHN2.8332e-62.1043e-76.0097e-82.4276e-81.9398e-82.8078e-62.5601e-73.1277e-85.0235e-927.3344
EQUI GUHHE3.1787e-62.8600e-79.2668e-83.4616e-81.9284e-85.6339e-63.7667e-72.9663e-85.4363e-927.3344
VLC MNHHZ1.9926e-62.1526e-72.9746e-81.2291e-88.9958e-91.4701e-61.1938e-71.5273e-82.4455e-928.125
VLC MNHHN2.2831e-62.5097e-76.7560e-82.0064e-89.9415e-92.3734e-63.2137e-71.6239e-84.1331e-928.125
VLC MNHHE1.8472e-62.3154e-75.0947e-81.7751e-89.7907e-93.5677e-61.5882e-71.9526e-83.9219e-928.125
SARM GUEHZ8.5212e-78.6660e-83.6380e-81.1332e-85.5518e-91.3556e-61.5805e-78.5232e-92.0122e-931.225
SARM GUEHN1.2982e-61.7255e-76.6922e-83.8959e-81.5043e-81.7587e-62.4333e-72.4755e-83.5056e-931.225
SARM GUEHE1.3141e-61.7721e-75.0006e-82.3600e-89.6174e-93.3839e-61.6903e-71.4143e-83.9608e-931.225
PII IVHHZ4.4563e-76.4853e-83.1381e-89.9421e-95.0569e-99.0458e-71.8791e-77.0598e-91.2680e-933.9137
PII IVHHN4.2775e-76.5476e-83.7843e-81.4578e-86.5229e-98.4232e-72.5437e-77.7191e-91.6095e-933.9137
PII IVHHE4.2736e-76.3922e-84.0660e-81.8133e-87.5831e-99.0366e-72.6472e-71.0396e-81.2894e-933.9137
PLMA IVHHZ1.4574e-61.3509e-75.0893e-84.1738e-82.8455e-81.2359e-62.7017e-74.0054e-83.0190e-934.3292
PLMA IVHHN1.6711e-62.6563e-79.4056e-86.3931e-84.4537e-83.2890e-64.7727e-75.4102e-84.6228e-934.3292
PLMA IVHHE1.5577e-61.5527e-76.7579e-84.5126e-83.5009e-82.4437e-63.4081e-74.1134e-83.8532e-934.3292
*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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