MANUAL Location - Area: Alpi Graie , magnitude (ML): 0.4
2025-06-29 15:15:51 (UTC)

Regional Seismic Network of Northwestern Italy (Distav, University of Genoa)
Posted on: 2025-06-30 07:57:04

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Earthquake info - Manual location
Event - ID :250629151459
Magnitude (ML) :0.4 +/- 0.1
Origin Time :2025-06-29 15:15:51.063 (UTC)
Location : Latitude: 45.841 N, Longitude: 6.981 E
Area :Alpi Graie
Depth (km) :4.98
Distances (km) : 5.4 --- Courmayeur
8.6 --- Pre -Saint-Didier
10.2 --- Morgex
12.6 --- La Salle
13.9 --- La Thuile
15.5 --- Saint-Rhemy-En-Bosses
17.9 --- Saint-Oyen
19.1 --- Avise
19.3 --- Etroubles
19.9 --- Saint-Nicolas
20.9 --- Arvier
22.7 --- Allein
23.1 --- Introd
23.3 --- Villeneuve
24.1 --- Saint-Pierre
24.2 --- Valgrisenche
24.6 --- Rhemes-Saint-Georges
25.3 --- Gignod
25.3 --- Doues
25.4 --- Ollomont

Quality location estimate: Erh: 1.5 km, Erz: 0.6 km, Nf: 13, Gap: 176 °, Rms: 0.13


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.
COURMFR2025-06-29 15:15:52.9700.01900.220.212025-06-29 15:15:53.8590.02500.011.617.0
BLANCGU2025-06-29 15:15:53.2500.0140-0.031.582025-06-29 15:15:54.3000.0240-0.490.289.1
MRGEIV2025-06-29 15:15:53.9800.00700.041.452025-06-29 15:15:55.7500.0411-0.081.2312.1
REMYGU2025-06-29 15:15:54.3900.0070-0.410.37--:---.-----.---.-- 14.5
RSLFR2025-06-29 15:15:57.6500.0231-0.021.532025-06-29 15:16:01.8790.1534-0.180.8432.8
LSDGU2025-06-29 15:15:59.5990.12050.140.812025-06-29 15:16:04.9200.1414-0.180.8344.7


Local magnitude (ML) calculation results
Station Net Channels Stat. Mag. Wood-And.
Ampl.
Dist. (km) Azimuth
BLANCGUHH0.432.87e-19.1275
MRGE IVHH0.491.72e-112.1142
LSD GUHH0.511.85e-244.7164


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.
(°)
COURMFRHHZ3.1456e-43.6381e-51.0232e-52.7179e-61.5293e-66.9665e-44.2213e-52.5543e-66.2902e-77.0210
COURMFRHHN5.7338e-45.6917e-51.4516e-54.3378e-62.6414e-65.6030e-44.8305e-55.4901e-61.2837e-67.0210
COURMFRHHE3.4037e-45.3445e-51.7595e-54.6493e-62.6313e-66.5992e-48.6593e-54.6574e-61.1628e-67.0210
BLANCGUHHZ2.6688e-53.4560e-61.5197e-64.6826e-72.8299e-75.8255e-58.3154e-64.3013e-76.4258e-89.1275
BLANCGUHHN3.7395e-54.9474e-62.2099e-67.0938e-74.0570e-76.0711e-51.0506e-56.2867e-71.1476e-79.1275
BLANCGUHHE2.9003e-54.8941e-62.7513e-68.9148e-74.8620e-79.9393e-51.3981e-56.9629e-71.2061e-79.1275
MRGE IVHHZ3.3004e-52.9966e-64.7646e-71.9579e-71.0525e-71.5800e-51.9455e-62.4268e-75.7593e-812.1142
MRGE IVHHN8.8853e-57.6130e-68.4124e-72.3611e-71.4187e-73.4008e-54.5054e-64.2429e-71.1951e-712.1142
MRGE IVHHE5.5161e-54.0387e-69.6486e-74.2765e-72.3584e-73.3766e-54.4582e-63.7581e-78.6997e-812.1142
LSD GUHHZ1.6516e-61.6218e-76.2880e-82.6042e-81.2868e-82.3311e-62.6448e-72.1804e-83.3771e-944.7164
LSD GUHHN3.2967e-62.2906e-77.8869e-82.0703e-81.0705e-83.3164e-62.9284e-71.9238e-84.1950e-944.7164
LSD GUHHE3.1876e-64.0637e-71.3690e-73.6814e-82.0749e-85.0132e-65.1372e-73.4760e-88.7424e-944.7164
*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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