MANUAL Location - Area: Valdarno inferiore , magnitude (ML): 1.0
2026-08-04 13:26:26 (UTC)

Regional Seismic Network of Northwestern Italy (Distav, University of Genoa)
Posted on: 2026-08-04 13:45:03

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Earthquake info - Manual location
Event - ID :260804132532
Magnitude (ML) :1.0 +/- 0.2
Origin Time :2026-08-04 13:26:26.366 (UTC)
Location : Latitude: 43.725 N, Longitude: 10.359 E
Area :Valdarno inferiore
Depth (km) :4.74
Distances (km) : 3.5 --- Pisa
6.8 --- Vecchiano
7.9 --- San Giuliano Terme
12.6 --- Calci
16.2 --- Cascina
16.8 --- Massarosa
17.7 --- Vicopisano
17.7 --- Collesalvetti
17.8 --- Lucca
18.4 --- Buti
18.5 --- Viareggio
19.5 --- Livorno
21.1 --- Bientina
21.1 --- Calcinaia
21.2 --- Fauglia
21.6 --- Capannori
23.2 --- Pontedera
23.7 --- Crespina
24.5 --- Camaiore
24.5 --- Porcari

Quality location estimate: Erh: 1.2 km, Erz: 1.6 km, Nf: 22, Gap: 250 °, Rms: 0.20


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.
PIIIV2026-08-04 13:26:29.3710.0200-0.370.372026-08-04 13:26:31.5780.0400-0.680.3014.2
MAIMGU2026-08-04 13:26:31.4000.01100.021.792026-08-04 13:26:35.0890.0481-0.031.5524.0
CMEIT2026-08-04 13:26:31.7290.0200-0.051.612026-08-04 13:26:35.9100.04000.121.2126.4
CARDGU2026-08-04 13:26:33.1500.0110-0.011.742026-08-04 13:26:38.1860.0400-0.041.4235.2
BDIIV2026-08-04 13:26:33.9900.0150-0.580.382026-08-04 13:26:40.2100.0400-0.470.4842.4
VGLIT2026-08-04 13:26:34.5900.0200-0.021.652026-08-04 13:26:40.3400.0400-0.380.5543.6
POPMGU2026-08-04 13:26:35.3500.01800.051.562026-08-04 13:26:42.0470.04000.071.2148.0
VLCMN2026-08-04 13:26:35.4400.01800.220.602026-08-04 13:26:41.6690.0400-0.141.0848.6
SARMGU2026-08-04 13:26:35.8800.02000.041.552026-08-04 13:26:42.9780.04000.091.1551.5
EQUIGU2026-08-04 13:26:34.7900.0221-1.060.132026-08-04 13:26:42.0180.1795-0.830.3052.0
GSCLGU2026-08-04 13:26:39.8500.0291-0.121.152026-08-04 13:26:49.0030.0400-1.010.2072.1


Local magnitude (ML) calculation results
Station Net Channels Stat. Mag. Wood-And.
Ampl.		 Dist. (km) Azimuth
PII IVHH1.035.23e-114.291
MAIM GUHH0.971.57e-124.027
CME ITHN1.051.78e-126.4350
CARD GUHH1.151.30e-135.216
BDI IVHH0.643.47e-242.427
POPM GUHH0.918.15e-248.042
VLC MNHH0.993.38e-248.63
SARM GUEH0.803.31e-251.54
EQUI GUHH0.802.70e-252.0341
GSCL GUHH1.354.68e-272.115


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.
(°)
PII IVHHZ5.4756e-57.6697e-63.0272e-67.2416e-74.3185e-71.7259e-41.3213e-57.4467e-71.6697e-714.291
PII IVHHN4.2996e-58.9296e-64.6087e-61.0353e-65.8673e-71.6116e-42.9995e-59.2235e-71.8889e-714.291
PII IVHHE3.7062e-58.9300e-64.1250e-61.4524e-68.7783e-71.8064e-41.9339e-51.3514e-62.0880e-714.291
MAIM GUHHZ1.2039e-51.7858e-67.7530e-72.2630e-71.0523e-72.3448e-53.9812e-61.9022e-74.1686e-824.027
MAIM GUHHN1.3455e-52.4945e-61.3394e-64.2778e-72.1225e-74.3972e-54.6165e-63.3568e-76.3921e-824.027
MAIM GUHHE1.8104e-52.1307e-61.0945e-63.8862e-71.6061e-72.9491e-54.2438e-62.3118e-74.9572e-824.027
CME ITHNZ1.3771e-51.7905e-67.8639e-73.0341e-72.0531e-73.8392e-53.9060e-62.8566e-74.3086e-826.4350
CME ITHNN2.1075e-52.8339e-61.9610e-65.8155e-72.9313e-74.3702e-58.3739e-63.9699e-76.7831e-826.4350
CME ITHNE2.3949e-52.9578e-61.6112e-64.4265e-72.3076e-73.9259e-55.3851e-63.3055e-76.8918e-826.4350
CARD GUHHZ9.6346e-61.2281e-65.2846e-72.3539e-71.0132e-72.5051e-51.8791e-61.3590e-72.4802e-835.216
CARD GUHHN2.5594e-52.5737e-61.3006e-63.1286e-71.4316e-74.4907e-53.5126e-62.4476e-75.5992e-835.216
CARD GUHHE2.1793e-52.7842e-61.2018e-62.7731e-71.5228e-77.4307e-53.6811e-62.8724e-75.6035e-835.216
BDI IVHHZ3.7395e-64.0430e-71.7007e-75.4725e-83.6445e-85.3754e-67.6236e-76.3902e-89.0385e-942.427
BDI IVHHN4.2853e-66.2380e-73.6530e-78.5392e-84.4764e-87.2163e-61.8769e-66.4922e-81.2740e-842.427
BDI IVHHE3.0537e-63.7438e-72.4286e-76.8459e-83.4960e-86.4088e-61.4029e-65.1925e-88.3872e-942.427
VGL ITHGZ2.2402e-53.7793e-61.7571e-68.5021e-78.3097e-74.7658e-56.3436e-61.0569e-67.7178e-843.6353
VGL ITHGN2.8056e-56.2809e-64.0471e-61.1621e-66.3878e-75.9814e-51.3915e-59.4274e-71.5255e-743.6353
VGL ITHGE2.4560e-56.0151e-64.7516e-61.3645e-67.4804e-74.4750e-52.1615e-59.4350e-71.6255e-743.6353
POPM GUHHZ8.8715e-61.1883e-63.8794e-71.3061e-77.2881e-81.2744e-51.5348e-61.0479e-71.9838e-848.042
POPM GUHHN6.1568e-61.1998e-68.3732e-71.6640e-71.0112e-71.5775e-54.5503e-61.4895e-72.8382e-848.042
POPM GUHHE6.0899e-68.9378e-77.1931e-71.9933e-78.6137e-81.6141e-52.6558e-61.2840e-72.1063e-848.042
VLC MNHHZ3.1852e-63.3973e-71.7162e-76.1562e-83.3080e-87.9432e-64.9932e-74.1677e-87.6979e-948.63
VLC MNHHN4.1308e-67.6689e-72.9431e-78.3042e-84.7313e-81.2037e-58.6269e-78.0731e-81.7456e-848.63
VLC MNHHE3.1351e-64.4087e-72.2994e-77.9587e-83.9819e-89.6810e-61.0885e-66.4823e-81.0243e-848.63
SARM GUEHZ1.9778e-63.1646e-72.1568e-76.1890e-83.0509e-87.1783e-61.0091e-64.7331e-86.9201e-951.54
SARM GUEHN2.1965e-63.8316e-72.7438e-71.1807e-75.5705e-85.7208e-61.1149e-67.5896e-81.2089e-851.54
SARM GUEHE2.7042e-63.7064e-72.0432e-71.1223e-75.5135e-87.2274e-69.6438e-77.8207e-81.1103e-851.54
EQUI GUHHZ3.1330e-64.1840e-72.6895e-78.8984e-84.2597e-85.7880e-61.2732e-65.9012e-81.0040e-852.0341
EQUI GUHHN5.5188e-65.8941e-71.9878e-78.0685e-85.4664e-89.9984e-67.4768e-75.7279e-81.2271e-852.0341
EQUI GUHHE3.9437e-65.6457e-72.5288e-78.2036e-84.5404e-81.1836e-51.2068e-66.7982e-81.3469e-852.0341
GSCL GUHHZ1.9443e-62.3274e-71.3368e-74.3336e-82.8489e-83.2554e-65.9639e-73.5704e-85.8478e-972.115
GSCL GUHHN2.1968e-65.3134e-74.3671e-71.3340e-75.8205e-85.2295e-62.3436e-67.5464e-81.2645e-872.115
GSCL GUHHE2.6254e-65.6634e-74.4478e-71.4294e-76.2451e-85.5325e-61.6656e-61.0433e-71.5294e-872.115
*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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