MANUAL Location - Area: Alpi Apuane , magnitude (ML): 0.0
2025-04-23 08:06:26 (UTC)

Regional Seismic Network of Northwestern Italy (Distav, University of Genoa)
Posted on: 2025-04-23 20:51:13

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Earthquake info - Manual location
Event - ID :250423080543
Magnitude (ML) :0.0 +/- 0.1
Origin Time :2025-04-23 08:06:26.836 (UTC)
Location : Latitude: 43.960 N, Longitude: 10.438 E
Area :Alpi Apuane
Depth (km) :5.05
Distances (km) : 2.3 --- Pescaglia
4.3 --- Fabbriche di Vallico
8.9 --- Borgo a Mozzano
10.9 --- Camaiore
11.1 --- Vergemoli
11.4 --- Gallicano
12.2 --- Stazzema
12.4 --- Massarosa
12.8 --- Molazzana
13.3 --- Barga
13.4 --- Bagni di Lucca
13.5 --- Coreglia Antelminelli
13.9 --- Lucca
16.4 --- Pietrasanta
16.8 --- Capannori
16.9 --- Castelnuovo di Garfagnana
16.9 --- Villa Basilica
17.3 --- Seravezza
17.6 --- Fosciandora
18.1 --- Viareggio

Quality location estimate: Erh: 2.1 km, Erz: 1.5 km, Nf: 6, Gap: 245 °, Rms: 0.03


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.
MAIMGU2025-04-23 08:06:28.8120.0522-0.021.162025-04-23 08:06:30.3020.0400-0.001.238.5
CARDGU2025-04-23 08:06:29.3500.18380.500.032025-04-23 08:06:30.3350.04000.001.229.8
BDIIV2025-04-23 08:06:30.5230.02000.021.252025-04-23 08:06:33.2160.0400-0.021.1218.0


Local magnitude (ML) calculation results
Station Net Channels Stat. Mag. Wood-And.
Ampl.
Dist. (km) Azimuth
MAIM GUHH-0.031.01e-18.5141
CARD GUHH0.071.12e-19.825


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.
(°)
MAIM GUHHZ1.8147e-65.1272e-74.3011e-73.9701e-72.2458e-76.3181e-63.4783e-62.5704e-71.8803e-88.5141
MAIM GUHHN2.4654e-67.0987e-74.9821e-73.5331e-71.2157e-79.9428e-62.7542e-61.5650e-71.7689e-88.5141
MAIM GUHHE2.0820e-67.2280e-76.1461e-76.5355e-72.9346e-76.0458e-64.2629e-62.9131e-72.4560e-88.5141
CARD GUHHZ2.5826e-65.9857e-73.7798e-72.2967e-77.3926e-89.9657e-61.8651e-69.2250e-81.3526e-89.825
CARD GUHHN6.0659e-61.7428e-61.0164e-63.2818e-71.5095e-71.6092e-54.9800e-62.1188e-73.6268e-89.825
CARD GUHHE6.7285e-61.2178e-61.0683e-64.7305e-72.0017e-71.8016e-56.1775e-62.4564e-73.1783e-89.825
BDI IVHHZ5.7467e-78.6277e-87.2234e-84.1267e-82.3724e-81.5715e-64.2140e-72.5162e-82.5806e-918.048
BDI IVHHN6.1825e-71.2272e-71.0759e-77.0102e-82.6242e-81.7369e-66.2108e-73.3963e-82.8898e-918.048
BDI IVHHE7.6492e-71.1243e-71.0311e-75.8964e-82.3856e-82.3615e-65.5303e-72.7497e-83.5654e-918.048
*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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