MANUAL Location - Area: Garfagnana , magnitude (ML): 0.4
2025-09-25 09:54:00 (UTC)

Regional Seismic Network of Northwestern Italy (Distav, University of Genoa)
Posted on: 2025-09-25 19:30:14

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Earthquake info - Manual location
Event - ID :250925095223
Magnitude (ML) :0.4 +/- 0.2
Origin Time :2025-09-25 09:54:00.596 (UTC)
Location : Latitude: 44.049 N, Longitude: 10.731 E
Area :Garfagnana
Depth (km) :11.02
Distances (km) : 3.6 --- Piteglio
5.0 --- San Marcello Pistoiese
6.2 --- Cutigliano
12.0 --- Bagni di Lucca
12.0 --- Abetone
13.1 --- Marliana
15.0 --- Villa Basilica
15.4 --- Massa e Cozzile
16.1 --- Fiumalbo
16.5 --- Coreglia Antelminelli
16.6 --- Borgo a Mozzano
17.3 --- Pescia
17.8 --- Serravalle Pistoiese
18.2 --- Lizzano in Belvedere
18.4 --- Fanano
18.5 --- Uzzano
18.6 --- Montecatini-Terme
18.7 --- Buggiano
19.2 --- Granaglione
19.4 --- Pistoia

Quality location estimate: Erh: 1.5 km, Erz: 3.4 km, Nf: 12, Gap: 161 °, 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.
POPMGU2025-09-25 09:54:02.1600.0030-0.730.002025-09-25 09:54:02.8100.1173-1.840.0011.7
BDIIV2025-09-25 09:54:03.2700.0060-0.400.012025-09-25 09:54:04.6880.1002-1.320.0016.0
CARDGU2025-09-25 09:54:04.8200.0110-0.081.552025-09-25 09:54:08.0980.1303-0.011.4923.0
MAIMGU2025-09-25 09:54:05.6100.01300.012.202025-09-25 09:54:09.3410.04000.041.7926.8
VLCMN2025-09-25 09:54:06.5330.02000.022.132025-09-25 09:54:11.3370.04000.470.2132.2
SARMGU2025-09-25 09:54:06.6100.0150-0.012.192025-09-25 09:54:11.3900.09320.330.4332.6


Local magnitude (ML) calculation results
Station Net Channels Stat. Mag. Wood-And.
Ampl.
Dist. (km) Azimuth
BDI IVHH0.411.28e-116.0278
CARD GUHH0.405.14e-223.0263
MAIM GUHH0.161.98e-226.8232
SARM GUEH0.757.18e-232.6300


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.
(°)
POPM GUHHZ2.4963e-43.0194e-51.0892e-54.2846e-61.9916e-62.8375e-48.9383e-52.7814e-63.9048e-711.7101
POPM GUHHN1.5334e-42.4183e-52.0704e-56.8854e-64.2495e-64.0351e-41.3776e-46.4537e-68.0883e-711.7101
POPM GUHHE7.7791e-51.4107e-51.1872e-56.3958e-62.4994e-62.6026e-45.4981e-53.5730e-64.6188e-711.7101
BDI IVHHZ1.1119e-51.4766e-67.4382e-72.5163e-71.0580e-71.9553e-53.7016e-61.5967e-72.8245e-816.0278
BDI IVHHN1.2594e-51.4517e-68.7175e-72.4461e-71.2628e-72.6570e-53.4972e-61.8975e-73.0929e-816.0278
BDI IVHHE1.0383e-51.5805e-61.3976e-64.6810e-71.9510e-72.4971e-51.1066e-52.8407e-74.1145e-816.0278
CARD GUHHZ4.6279e-64.9832e-71.8706e-78.1408e-88.0553e-87.2128e-68.1061e-71.2128e-71.6688e-823.0263
CARD GUHHN6.1794e-66.7898e-74.7676e-71.4067e-76.7335e-81.6166e-52.7908e-61.1133e-71.9297e-823.0263
CARD GUHHE7.2911e-68.1037e-74.2358e-71.1816e-76.6974e-81.3499e-52.3861e-61.0800e-71.7483e-823.0263
MAIM GUHHZ1.0221e-61.8791e-71.2283e-75.1317e-82.3529e-82.1770e-69.8678e-73.2707e-84.8805e-926.8232
MAIM GUHHN1.3611e-62.3721e-72.0587e-77.4346e-83.3419e-84.2125e-61.0880e-64.3710e-86.9454e-926.8232
MAIM GUHHE1.3267e-62.3265e-71.7280e-79.1167e-83.9852e-83.2273e-69.8497e-75.7360e-85.3405e-926.8232
VLC MNHHZ1.0499e-61.4462e-77.0266e-83.2395e-82.6300e-81.8924e-63.4299e-73.9453e-83.1588e-932.2294
VLC MNHHN1.1421e-61.4904e-79.2124e-84.2003e-82.1835e-82.4692e-65.2722e-72.6682e-83.4657e-932.2294
VLC MNHHE1.7790e-61.7758e-78.2701e-83.1877e-81.9745e-82.1929e-64.2092e-73.0341e-83.3966e-932.2294
SARM GUEHZ1.1968e-64.9478e-74.3660e-72.0579e-78.0270e-82.7193e-62.8612e-61.1707e-71.4565e-832.6300
SARM GUEHN1.7769e-64.9104e-75.1000e-72.5373e-71.0946e-73.3068e-62.3209e-61.3755e-71.7515e-832.6300
SARM GUEHE1.3705e-65.0382e-74.8404e-72.9533e-71.1507e-72.2574e-62.6996e-61.4864e-71.9212e-832.6300
*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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