MANUAL Location - Area: Appennino bolognese , magnitude (ML): 1.0
2025-03-31 06:22:24 (UTC)

Regional Seismic Network of Northwestern Italy (Distav, University of Genoa)
Posted on: 2025-03-31 07:39:38

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Earthquake info - Manual location
Event - ID :250331062123
Magnitude (ML) :1.0 +/- 0.2
Origin Time :2025-03-31 06:22:24.903 (UTC)
Location : Latitude: 44.214 N, Longitude: 11.373 E
Area :Appennino bolognese
Depth (km) :11.40
Distances (km) : 4.3 --- Monghidoro
7.5 --- Loiano
10.4 --- Firenzuola
10.5 --- Castel del Rio
11.0 --- Monzuno
11.0 --- San Benedetto Val di Sambro
12.8 --- Monterenzio
15.7 --- Fontanelice
17.8 --- Palazzuolo sul Senio
18.1 --- Grizzana Morandi
18.6 --- Castiglione dei Pepoli
18.6 --- Borgo Tossignano
18.8 --- Pianoro
19.6 --- Marzabotto
20.1 --- Casola Valsenio
21.7 --- Casalfiumanese
22.1 --- Vergato
22.6 --- Sasso Marconi
23.1 --- Camugnano
24.2 --- Scarperia

Quality location estimate: Erh: 1 km, Erz: 0.8 km, Nf: 14, Gap: 145 °, 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.
MTRZIV2025-03-31 06:22:28.2500.0090-0.011.972025-03-31 06:22:31.5360.05610.540.3816.8
SEIIV2025-03-31 06:22:29.0700.01600.031.832025-03-31 06:22:32.4500.0611-0.031.7221.4
ZCCAIV2025-03-31 06:22:33.4900.06730.630.372025-03-31 06:22:39.0980.0400-0.181.0237.1
RUFIIV2025-03-31 06:22:33.4600.0472-0.071.592025-03-31 06:22:38.9150.1594-1.460.0144.7
BDIIV2025-03-31 06:22:36.9600.03310.011.542025-03-31 06:22:46.5180.20050.370.6865.3
MAIMGU2025-03-31 06:22:40.1540.02000.940.092025-03-31 06:22:50.0150.04000.111.0078.8
CSNTIV2025-03-31 06:22:40.3310.0200-0.041.392025-03-31 06:22:51.1600.2517-0.490.4183.4


Local magnitude (ML) calculation results
Station Net Channels Stat. Mag. Wood-And.
Ampl.
Dist. (km) Azimuth
ZCCA IVHH0.633.58e-237.1296
BDI IVHH1.094.04e-265.3255
MAIM GUHH1.152.17e-278.8245


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.
(°)
MTRZ IVHHZ3.4356e-54.4030e-64.2545e-61.8417e-66.6850e-73.7186e-52.5643e-58.3693e-71.1916e-716.821
MTRZ IVHHN3.7048e-59.7993e-69.4996e-64.0026e-61.7259e-61.0027e-44.6759e-52.4017e-62.7240e-716.821
MTRZ IVHHE4.1539e-51.0503e-59.5438e-65.9474e-63.1445e-61.1792e-45.4382e-54.4283e-63.5528e-716.821
SEI IVHHZ1.3520e-43.0198e-51.7060e-54.4401e-62.6448e-62.6552e-46.9504e-54.2371e-68.0399e-721.4184
SEI IVHHN1.8473e-45.6139e-52.9868e-59.0960e-65.0588e-64.3877e-41.2088e-47.6939e-61.3117e-621.4184
SEI IVHHE9.2667e-52.2342e-51.2286e-53.8077e-62.1612e-62.5883e-47.8243e-53.2246e-64.7452e-721.4184
ZCCA IVHHZ2.0340e-63.0023e-71.7714e-71.2885e-75.6403e-82.5488e-61.5405e-66.0879e-85.1349e-937.1296
ZCCA IVHHN1.3227e-62.1561e-72.3781e-72.1957e-71.0267e-72.3420e-69.5661e-71.2626e-79.0086e-937.1296
ZCCA IVHHE1.6067e-62.6176e-72.5991e-71.5784e-76.6274e-82.8475e-61.3391e-67.9455e-88.3667e-937.1296
BDI IVHHZ1.3551e-62.3129e-72.1615e-78.3628e-83.7132e-82.7626e-61.1303e-64.3268e-85.9081e-965.3255
BDI IVHHN2.7906e-65.5105e-73.6840e-71.5433e-76.7108e-87.3853e-61.4809e-68.8586e-81.4388e-865.3255
BDI IVHHE1.7467e-63.3852e-73.2793e-71.3165e-76.8248e-85.7736e-62.5260e-68.8374e-89.8347e-965.3255
MAIM GUHHZ3.9814e-78.5796e-88.8947e-86.0973e-82.5670e-81.4735e-64.8876e-73.2421e-82.9014e-978.8245
MAIM GUHHN5.5391e-71.5156e-71.4947e-71.5394e-77.6405e-81.7919e-67.0706e-78.8387e-87.0538e-978.8245
MAIM GUHHE5.8270e-71.6871e-71.2518e-71.0587e-77.5316e-82.2606e-66.3362e-71.1526e-78.5115e-978.8245
*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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