MANUAL Location - Area: Valdarno inferiore , magnitude (ML): 0.6
2025-08-13 23:25:24 (UTC)

Regional Seismic Network of Northwestern Italy (Distav, University of Genoa)
Posted on: 2025-08-14 07:07:11

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Earthquake info - Manual location
Event - ID :250813232402
Magnitude (ML) :0.6 +/- 0.2
Origin Time :2025-08-13 23:25:24.733 (UTC)
Location : Latitude: 43.811 N, Longitude: 10.872 E
Area :Valdarno inferiore
Depth (km) :5.02
Distances (km) : 1.3 --- Larciano
2.2 --- Lamporecchio
5.2 --- Vinci
5.6 --- Cerreto Guidi
8.1 --- Monsummano Terme
9.6 --- Quarrata
9.8 --- Pieve a Nievole
10.3 --- Fucecchio
10.4 --- Ponte Buggianese
11.1 --- Serravalle Pistoiese
11.3 --- Capraia e Limite
11.4 --- Montecatini-Terme
11.7 --- Empoli
11.9 --- Carmignano
12.6 --- Chiesina Uzzanese
13.0 --- Santa Croce sull Arno
13.7 --- Buggiano
14.1 --- Pistoia
14.6 --- San Miniato
14.6 --- Poggio a Caiano

Quality location estimate: Erh: 0.7 km, Erz: 2.1 km, Nf: 18, Gap: 113 °, Rms: 0.17


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.
POPMGU2025-08-13 23:25:30.0800.0120-0.171.202025-08-13 23:25:34.3300.0922-0.041.5428.1
PIIIV2025-08-13 23:25:30.7680.02000.011.692025-08-13 23:25:35.1600.10020.001.4730.0
MAIMGU2025-08-13 23:25:31.1600.0150-0.021.702025-08-13 23:25:35.8400.1093-0.091.4232.9
CARDGU2025-08-13 23:25:31.9400.0703-0.250.902025-08-13 23:25:37.9300.12730.220.7839.7
OSSCIV2025-08-13 23:25:33.4630.02000.081.392025-08-13 23:25:39.8500.04000.071.3144.2
CSNTIV2025-08-13 23:25:34.5810.0200-0.201.152025-08-13 23:25:41.7530.0400-0.400.4750.7
RUFIIV2025-08-13 23:25:33.6750.0200-1.060.022025-08-13 23:25:40.8500.1514-1.560.0251.5
SARMGU2025-08-13 23:25:36.2840.02001.240.112025-08-13 23:25:42.8050.04000.041.2856.3
ZCCAIV2025-08-13 23:25:36.7930.02000.051.452025-08-13 23:25:46.9280.04001.190.1160.9


Local magnitude (ML) calculation results
Station Net Channels Stat. Mag. Wood-And.
Ampl.
Dist. (km) Azimuth
POPM GUHH0.992.82e-128.1341
PII IVHH0.262.28e-230.0251
CARD GUHH0.602.87e-239.7308
OSSC IVHH0.602.31e-244.2137
SARM GUEH0.359.66e-356.3318
ZCCA IVHH0.591.18e-260.98


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 GUHHZ5.3570e-53.7266e-66.2114e-71.8951e-79.6396e-82.6044e-52.5414e-61.6720e-73.4422e-828.1341
POPM GUHHN5.1211e-54.0469e-62.2079e-64.9975e-73.0142e-77.5575e-59.2233e-65.1583e-71.0203e-728.1341
POPM GUHHE2.8941e-53.4413e-61.6686e-64.0463e-72.3260e-76.4315e-57.0200e-63.8812e-78.1545e-828.1341
PII IVHHZ1.4127e-62.2475e-71.6058e-73.4178e-82.0163e-83.5452e-66.4750e-73.1373e-86.1123e-930.0251
PII IVHHN1.3971e-62.9397e-71.7433e-74.8851e-82.3902e-85.0714e-68.3087e-73.6715e-85.6943e-930.0251
PII IVHHE1.7572e-63.6855e-71.7266e-75.4629e-82.6074e-85.8709e-68.7975e-74.3018e-88.6794e-930.0251
MAIM GUHHZ1.4524e-61.9606e-79.2346e-83.1941e-81.6143e-83.1810e-65.8281e-72.6416e-84.1888e-932.9291
MAIM GUHHN2.0496e-62.5742e-71.3075e-75.3964e-82.0406e-84.0076e-67.8872e-72.7876e-85.3193e-932.9291
MAIM GUHHE2.5597e-62.6277e-71.2158e-75.5079e-84.3787e-86.2162e-64.7571e-77.4572e-85.6415e-932.9291
CARD GUHHZ2.1011e-62.4249e-71.1451e-75.4121e-83.1822e-85.6116e-65.1182e-75.1938e-86.5157e-939.7308
CARD GUHHN5.6120e-65.8483e-72.6565e-76.4980e-83.3501e-81.2512e-59.6429e-75.4574e-81.1686e-839.7308
CARD GUHHE3.7156e-65.2023e-72.4542e-77.0404e-83.2905e-81.5577e-57.2997e-75.0884e-81.2208e-839.7308
OSSC IVHHZ3.4894e-79.9648e-88.0461e-84.7849e-81.8387e-89.2534e-74.9793e-72.2184e-82.3460e-944.2137
OSSC IVHHN6.7947e-72.2362e-71.8863e-79.6834e-83.7755e-81.8082e-61.2373e-65.6172e-86.3639e-944.2137
OSSC IVHHE7.1556e-72.4311e-71.8541e-78.6441e-84.0229e-82.6007e-61.1117e-65.5271e-86.4753e-944.2137
SARM GUEHZ5.9168e-77.3748e-85.3583e-82.0389e-88.6595e-91.2493e-62.7382e-71.2013e-81.9249e-956.3318
SARM GUEHN9.2227e-71.6967e-79.5207e-86.1727e-82.4322e-81.9233e-64.1677e-73.4007e-83.6162e-956.3318
SARM GUEHE6.0026e-71.0124e-76.4915e-83.8546e-81.5878e-81.1945e-63.7220e-71.9152e-82.6836e-956.3318
ZCCA IVHHZ2.7169e-75.6304e-84.6209e-84.6381e-83.9368e-84.9295e-72.4310e-77.8117e-85.7754e-960.98
ZCCA IVHHN3.9478e-79.9639e-88.6152e-86.2686e-82.4082e-85.6387e-76.1161e-73.1650e-82.9645e-960.98
ZCCA IVHHE5.0212e-76.8253e-86.0211e-84.8006e-81.7747e-83.6196e-73.1966e-72.3267e-82.5351e-960.98
*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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