MANUAL Location - Area: Alpi Apuane , magnitude (ML): 0.3
2025-03-17 15:00:21 (UTC)

Regional Seismic Network of Northwestern Italy (Distav, University of Genoa)
Posted on: 2025-03-18 08:19:13

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Earthquake info - Manual location
Event - ID :250317145950
Magnitude (ML) :0.3 +/- 0.2
Origin Time :2025-03-17 15:00:21.69 (UTC)
Location : Latitude: 44.184 N, Longitude: 10.181 E
Area :Alpi Apuane
Depth (km) :2.02
Distances (km) : 2.1 --- Casola in Lunigiana
2.6 --- Minucciano
6.1 --- Giuncugnano
7.6 --- Fivizzano
9.4 --- Piazza al Serchio
10.7 --- Sillano
11.2 --- Vagli Sotto
12.6 --- Camporgiano
12.8 --- Comano
13.4 --- San Romano in Garfagnana
13.4 --- Careggine
13.9 --- Fosdinovo
14.6 --- Licciana Nardi
15.0 --- Ortonovo
16.0 --- Castelnuovo Magra
17.2 --- Aulla
17.3 --- Carrara
17.5 --- Villa Collemandina
18.1 --- Massa
18.3 --- Montignoso

Quality location estimate: Erh: 0.5 km, Erz: 0.3 km, Nf: 12, Gap: 105 °, Rms: 0.08


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.
EQUIGU2025-03-17 15:00:22.8100.0120-0.011.852025-03-17 15:00:23.2210.0400-0.410.233.8
FIVIGU2025-03-17 15:00:23.6690.02000.061.522025-03-17 15:00:24.9220.0400-0.031.667.9
SARMGU2025-03-17 15:00:25.5830.0200-0.011.842025-03-17 15:00:28.4540.04000.031.6117.8
CMEIT2025-03-17 15:00:27.2450.1004-0.041.282025-03-17 15:00:30.3300.1604-1.010.0027.4
GRAMGU2025-03-17 15:00:28.6780.15060.340.202025-03-17 15:00:32.3200.0400-0.390.2735.5
POPMGU2025-03-17 15:00:30.7680.02000.021.532025-03-17 15:00:35.2980.1303-2.130.0048.6


Local magnitude (ML) calculation results
Station Net Channels Stat. Mag. Wood-And.
Ampl.
Dist. (km) Azimuth
FIVI GUHN-0.031.29e-17.9325
GRAM GUHH0.424.31e-235.5345
POPM GUHH0.372.33e-248.6108


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.
(°)
EQUI GUHHZ4.3509e-53.5008e-69.2448e-73.8088e-71.8041e-72.4055e-56.0230e-62.7397e-75.6709e-83.8228
EQUI GUHHN4.9994e-54.4944e-61.1906e-65.8681e-73.1585e-74.0712e-57.8329e-64.7307e-77.9334e-83.8228
EQUI GUHHE4.1564e-54.1404e-69.2633e-73.0909e-71.6534e-73.8897e-54.1646e-62.8142e-76.0601e-83.8228
FIVI GUHNZ5.5446e-55.1566e-61.2997e-63.8811e-71.7124e-73.5899e-53.3719e-62.7153e-75.3226e-87.9325
FIVI GUHNN1.8734e-52.4405e-61.1537e-63.2270e-71.7512e-73.6806e-54.7543e-62.8658e-76.3204e-87.9325
FIVI GUHNE2.5320e-52.1547e-61.0590e-63.3720e-71.5481e-74.1147e-54.8721e-62.4515e-75.0781e-87.9325
SARM GUEHZ1.4113e-62.0832e-79.3142e-83.3248e-81.5545e-82.5162e-64.4563e-72.6664e-84.1798e-917.890
SARM GUEHN2.5664e-64.0666e-71.7858e-78.5306e-84.0547e-82.8126e-69.1819e-75.7822e-81.0022e-817.890
SARM GUEHE2.1649e-62.9864e-71.1702e-75.1141e-82.7936e-84.6159e-65.1978e-72.8439e-86.3915e-917.890
CME ITHNZ2.0974e-64.0021e-73.6197e-72.6728e-71.8285e-74.3476e-62.2584e-62.2824e-71.1938e-827.4159
CME ITHNN3.0621e-65.3603e-74.0891e-76.7089e-75.9126e-75.3033e-61.9338e-67.5245e-74.5651e-827.4159
CME ITHNE3.0420e-65.1066e-73.9554e-75.0254e-75.5448e-74.7454e-61.5657e-67.5334e-74.5216e-827.4159
GRAM GUHHZ3.0905e-63.1596e-71.2800e-74.3756e-82.4597e-83.0545e-64.7927e-73.8574e-86.4289e-935.5345
GRAM GUHHN3.7935e-65.3325e-73.3231e-79.9127e-84.9044e-85.5894e-61.3987e-67.3143e-81.3068e-835.5345
GRAM GUHHE2.6429e-65.7323e-74.0582e-71.1046e-76.1957e-84.6011e-62.1180e-61.0341e-71.3209e-835.5345
POPM GUHHZ3.5888e-63.0409e-71.2421e-75.2375e-83.5826e-82.8573e-68.8322e-74.6277e-89.7891e-948.6108
POPM GUHHN7.7805e-66.1756e-72.0913e-77.0593e-84.3110e-83.4416e-61.3486e-68.8124e-81.1882e-848.6108
POPM GUHHE4.8538e-64.4943e-72.3523e-75.9367e-83.0006e-83.3323e-61.6631e-64.6454e-88.1097e-948.6108
*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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