MANUAL Location - Area: Lunigiana , magnitude (ML): 0.7
2025-08-28 04:09:03 (UTC)

Regional Seismic Network of Northwestern Italy (Distav, University of Genoa)
Posted on: 2025-08-28 09:36:24

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Earthquake info - Manual location
Event - ID :250828040751
Magnitude (ML) :0.7 +/- 0.2
Origin Time :2025-08-28 04:09:03.419 (UTC)
Location : Latitude: 44.246 N, Longitude: 10.091 E
Area :Lunigiana
Depth (km) :9.90
Distances (km) : 2.8 --- Fivizzano
4.7 --- Licciana Nardi
6.0 --- Comano
8.3 --- Casola in Lunigiana
10.3 --- Aulla
11.0 --- Bagnone
11.5 --- Tresana
12.3 --- Villafranca in Lunigiana
12.5 --- Minucciano
12.5 --- Podenzana
13.0 --- Giuncugnano
13.4 --- Fosdinovo
15.6 --- Filattiera
16.8 --- Bolano
16.8 --- Santo Stefano di Magra
17.1 --- Sillano
17.2 --- Castelnuovo Magra
17.6 --- Ortonovo
17.8 --- Mulazzo
17.9 --- Piazza al Serchio

Quality location estimate: Erh: 0.6 km, Erz: 0.7 km, Nf: 26, Gap: 76 °, 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.
FIVIGU2025-08-28 04:09:05.5070.02000.011.852025-08-28 04:09:06.6760.0400-0.280.4110.7
AULIT2025-08-28 04:09:06.2690.02000.031.782025-08-28 04:09:07.4390.0400-0.820.2914.2
EQUIGU2025-08-28 04:09:06.3700.00800.071.452025-08-28 04:09:08.2900.0421-0.061.6014.5
VLCMN2025-08-28 04:09:08.6370.02000.081.422025-08-28 04:09:12.5700.24660.240.7427.5
SARMGU2025-08-28 04:09:08.8900.0140-0.021.832025-08-28 04:09:12.5290.1394-0.420.4127.9
GRAMGU2025-08-28 04:09:09.0300.01600.250.432025-08-28 04:09:12.9500.08920.520.0929.4
PLMAIV2025-08-28 04:09:09.0780.0200-0.031.782025-08-28 04:09:12.7330.2797-0.550.4530.5
ERBMIV2025-08-28 04:09:10.1800.0180-0.031.722025-08-28 04:09:15.2550.1855-0.081.0733.8
CMEIT2025-08-28 04:09:10.4600.0200-0.011.752025-08-28 04:09:14.9200.0400-0.720.3137.9
CARDGU2025-08-28 04:09:10.9390.02000.220.562025-08-28 04:09:16.1770.13030.131.0541.0
GSCLGU2025-08-28 04:09:11.7910.0200-0.121.192025-08-28 04:09:17.4300.1374-0.720.3042.6
MSSAIV2025-08-28 04:09:12.0000.0673-0.051.472025-08-28 04:09:18.3600.3407-0.190.7747.5
PIIIV2025-08-28 04:09:15.5300.0200-0.161.032025-08-28 04:09:23.9120.0400-0.830.2668.5


Local magnitude (ML) calculation results
Station Net Channels Stat. Mag. Wood-And.
Ampl.
Dist. (km) Azimuth
FIVI GUHN1.141.11e+010.7104
EQUI GUHH0.248.30e-214.5151
SARM GUEH0.515.49e-227.9105
GRAM GUHH0.671.09e-129.4356
PLMA IVHH0.705.87e-230.5221
ERBM IVEH0.664.54e-233.853
CME ITHN1.069.01e-237.9153
CARD GUHH0.854.82e-241.0128
GSCL GUHH0.773.76e-242.673
PII IVHH0.771.40e-268.5149


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.
(°)
FIVI GUHNZ9.7378e-51.5418e-55.7154e-61.5155e-61.0496e-63.5797e-42.0653e-51.7983e-63.7551e-710.7104
FIVI GUHNN9.8927e-51.3581e-55.5948e-61.3691e-68.2839e-71.8212e-42.0938e-51.4740e-63.0668e-710.7104
FIVI GUHNE8.3813e-51.8178e-59.8677e-62.8124e-61.4332e-62.0602e-44.1019e-52.3142e-64.5476e-710.7104
EQUI GUHHZ1.5915e-51.3346e-64.2396e-71.8491e-78.7859e-81.0666e-51.9293e-61.3403e-72.2085e-814.5151
EQUI GUHHN1.3624e-51.4365e-65.1776e-71.9272e-78.6289e-82.0254e-52.9469e-61.5474e-73.3400e-814.5151
EQUI GUHHE1.8012e-51.8691e-65.9005e-72.3078e-71.0711e-72.4730e-53.2930e-61.9145e-73.8119e-814.5151
VLC MNHHZ1.7583e-62.0004e-77.9154e-83.7885e-82.5648e-82.9795e-63.7007e-73.1871e-85.6494e-927.5112
VLC MNHHN2.6637e-63.2323e-71.1977e-75.8482e-83.0037e-83.9565e-66.3573e-73.2430e-86.3705e-927.5112
VLC MNHHE2.3953e-62.3380e-71.1531e-74.7863e-82.6426e-83.9652e-65.0172e-73.2397e-86.1896e-927.5112
SARM GUEHZ2.9716e-63.6349e-72.6352e-79.1184e-84.4290e-88.3171e-61.5146e-65.8952e-88.1763e-927.9105
SARM GUEHN2.5857e-66.6404e-74.5514e-72.4264e-71.0750e-78.3112e-62.3354e-61.4112e-71.7293e-827.9105
SARM GUEHE2.0737e-63.6897e-72.4284e-78.1774e-84.2775e-84.4169e-61.4536e-65.6154e-88.4201e-927.9105
GRAM GUHHZ6.5298e-66.3155e-74.1352e-71.1082e-74.8439e-88.1687e-61.8365e-67.4196e-81.3871e-829.4356
GRAM GUHHN7.5121e-61.2849e-69.0002e-72.9716e-71.2982e-72.9437e-54.3649e-62.0107e-73.3766e-829.4356
GRAM GUHHE6.7272e-61.3516e-61.1092e-62.8814e-71.4139e-71.8781e-55.7809e-62.1088e-73.6074e-829.4356
PLMA IVHHZ7.2867e-67.1149e-72.3443e-71.3540e-79.0625e-87.0162e-61.5361e-61.4583e-71.7248e-830.5221
PLMA IVHHN8.0638e-61.3547e-64.9777e-72.0691e-71.6773e-72.5993e-52.0320e-61.8878e-72.8109e-830.5221
PLMA IVHHE6.3103e-69.1648e-74.4739e-72.3536e-71.5647e-71.4400e-52.4602e-61.8175e-72.4849e-830.5221
ERBM IVEHZ1.4188e-62.5499e-72.3706e-71.3616e-76.2251e-85.2071e-61.3309e-68.0940e-87.7602e-933.853
ERBM IVEHN2.5982e-66.7067e-73.8947e-71.4190e-76.9782e-88.5668e-61.5182e-69.8405e-81.4717e-833.853
ERBM IVEHE2.5159e-64.7314e-72.7493e-79.9718e-84.6944e-87.9531e-68.8186e-76.6050e-89.9855e-933.853
CME ITHNZ8.1714e-67.4690e-75.0068e-72.5816e-71.6391e-71.0417e-52.3551e-62.2916e-72.1334e-837.9153
CME ITHNN8.8984e-61.0011e-68.8040e-73.0102e-71.8861e-71.3321e-55.3424e-62.5159e-73.4501e-837.9153
CME ITHNE7.7920e-61.1116e-65.1914e-73.1849e-71.6000e-71.0908e-52.5134e-61.8988e-72.4985e-837.9153
CARD GUHHZ4.5296e-65.6557e-71.8051e-74.5851e-82.5634e-81.2223e-55.2929e-75.0127e-81.1198e-841.0128
CARD GUHHN9.0729e-61.0488e-64.1011e-71.1074e-77.7576e-81.7194e-51.3823e-61.7872e-72.9397e-841.0128
CARD GUHHE7.0972e-69.7599e-74.0067e-79.7205e-86.5111e-81.3807e-51.2212e-61.1249e-71.9079e-841.0128
GSCL GUHHZ8.1826e-71.6470e-71.0651e-75.2219e-86.4597e-81.5616e-64.2859e-71.1255e-78.4259e-942.673
GSCL GUHHN1.3111e-63.2160e-72.1769e-77.4709e-84.2579e-82.0715e-61.2328e-66.1516e-87.9101e-942.673
GSCL GUHHE1.2265e-63.5828e-72.9161e-71.2694e-79.7899e-82.0263e-61.5947e-61.6076e-71.2250e-842.673
MSSA IVHHZ6.4076e-79.6364e-84.3731e-83.0511e-83.9600e-81.9601e-62.3168e-74.6868e-84.4228e-947.5280
MSSA IVHHN7.9916e-71.4216e-76.7555e-82.7004e-83.4389e-81.9977e-62.3853e-75.5462e-84.3562e-947.5280
MSSA IVHHE4.9355e-71.1195e-75.6977e-83.5340e-84.4371e-81.4908e-62.5631e-76.4164e-84.0691e-947.5280
PII IVHHZ7.0668e-71.7416e-79.8524e-82.6168e-81.4208e-82.0059e-63.0940e-72.0344e-84.3547e-968.5149
PII IVHHN1.1278e-62.3246e-71.2201e-73.4527e-81.9072e-82.2462e-65.1721e-72.8153e-85.6955e-968.5149
PII IVHHE1.1707e-61.6679e-71.1318e-73.2492e-81.6197e-81.9498e-64.6261e-72.4592e-84.1488e-968.5149
*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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