MANUAL Location - Area: Alpi Graie , magnitude (ML): -0.3
2024-09-20 12:22:23 (UTC)

Regional Seismic Network of Northwestern Italy (Distav, University of Genoa)
Posted on: 2024-09-20 12:39:06

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Earthquake info - Manual location
Event - ID :240920122121
Magnitude (ML) :-0.3 +/- 0.1
Origin Time :2024-09-20 12:22:23.949 (UTC)
Location : Latitude: 45.818 N, Longitude: 6.947 E
Area :Alpi Graie
Depth (km) :3.62
Distances (km) : 3.4 --- Courmayeur
6.7 --- Pre -Saint-Didier
9.6 --- Morgex
11.0 --- La Thuile
12.4 --- La Salle
18.0 --- Saint-Rhemy-En-Bosses
19.2 --- Avise
20.3 --- Saint-Nicolas
20.5 --- Saint-Oyen
21.2 --- Arvier
21.8 --- Etroubles
22.6 --- Valgrisenche
23.3 --- Introd
23.9 --- Villeneuve
24.1 --- Rhemes-Saint-Georges
24.9 --- Saint-Pierre
25.1 --- Allein
26.3 --- Aymavilles
26.5 --- Sarre
27.3 --- Gignod

Quality location estimate: Erh: 1.2 km, Erz: 0.4 km, Nf: 10, Gap: 197 °, Rms: 0.06


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.
COURMFR2024-09-20 12:22:25.4300.00500.061.472024-09-20 12:22:26.3100.0080-0.011.765.3
MRGEIV2024-09-20 12:22:26.8000.0090-0.041.572024-09-20 12:22:28.7420.04000.011.7011.6
REMYGU2024-09-20 12:22:27.1100.0090-1.040.002024-09-20 12:22:29.3690.0400-1.550.0017.4
RSLFR2024-09-20 12:22:30.0410.02000.011.712024-09-20 12:22:33.9080.0400-0.061.1829.0
LSDGU2024-09-20 12:22:32.4040.02000.190.502024-09-20 12:22:38.0770.04000.410.1142.8


Local magnitude (ML) calculation results
Station Net Channels Stat. Mag. Wood-And.
Ampl.
Dist. (km) Azimuth
COURMFRHH-0.122.11e-15.377
MRGE IVHH-0.382.50e-211.6121
REMY GUHH-0.401.35e-217.482
LSD GUHH-0.134.59e-342.8160


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.
(°)
COURMFRHHZ3.1748e-54.7809e-61.5577e-63.5080e-72.1002e-74.8576e-57.0445e-63.6968e-79.6743e-85.377
COURMFRHHN2.6114e-53.9767e-61.7951e-65.6211e-72.4247e-75.3377e-57.0537e-63.8407e-78.4374e-85.377
COURMFRHHE2.8435e-52.8168e-61.6161e-66.0530e-72.6121e-74.4055e-56.4607e-64.1482e-77.3574e-85.377
MRGE IVHHZ5.5122e-63.4895e-71.2030e-74.5981e-82.3631e-81.5288e-66.4139e-73.7033e-85.4236e-911.6121
MRGE IVHHN6.6636e-66.3283e-71.9291e-77.3535e-83.1408e-85.5196e-61.3927e-64.9431e-81.0209e-811.6121
MRGE IVHHE6.7841e-66.4071e-71.9424e-77.2835e-83.2062e-83.2485e-61.1734e-64.6493e-88.7429e-911.6121
REMY GUHHZ2.9503e-63.6343e-77.0574e-83.0574e-81.3036e-81.9497e-63.4957e-72.0039e-83.1146e-917.482
REMY GUHHN2.5357e-62.1200e-71.1930e-76.2770e-82.6347e-82.4857e-67.1463e-73.3278e-85.5333e-917.482
REMY GUHHE3.0618e-63.6798e-71.1213e-74.9246e-82.1082e-83.0416e-65.9961e-72.7423e-84.0980e-917.482
LSD GUHHZ2.5866e-73.1532e-82.0291e-81.3016e-85.9591e-93.6553e-71.0212e-77.9685e-98.3857e-1042.8160
LSD GUHHN3.3885e-74.5674e-82.5146e-89.5289e-95.4157e-97.5763e-71.5304e-77.0712e-98.2599e-1042.8160
LSD GUHHE3.1787e-76.8216e-83.7901e-81.1406e-86.7098e-99.0607e-71.8189e-79.8832e-91.7158e-942.8160
*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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