MANUAL Location - Area: Alpi Marittime , magnitude (ML): 0.5
2021-07-28 09:34:19 (UTC)

Regional Seismic Network of Northwestern Italy (Distav, University of Genoa)
Posted on: 2021-07-28 10:46:41

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Earthquake info - Manual location
Event - ID :210728093227
Magnitude (ML) :0.5 +/- 0.3
Origin Time :2021-07-28 09:34:19.658 (UTC)
Location : Latitude: 43.942 N, Longitude: 7.208 E
Area :Alpi Marittime
Depth (km) :6.01
Distances (km) : 25.6 --- Olivetta San Michele
28.8 --- Airole
32.0 --- Rocchetta Nervina
34.7 --- Dolceacqua
35.3 --- Isolabona
36.2 --- Ventimiglia
36.4 --- Camporosso
36.5 --- Pigna
36.6 --- Entracque
36.7 --- Apricale
37.4 --- Castel Vittorio
37.7 --- Perinaldo
37.8 --- Soldano
37.9 --- San Biagio della Cima
38.6 --- Vallecrosia
39.4 --- Vallebona
40.4 --- Valdieri
40.4 --- Bordighera
41.0 --- Seborga
41.0 --- Vinadio

Quality location estimate: Erh: 1.2 km, Erz: 1.6 km, Nf: 14, Gap: 198 °, Rms: 0.11


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.
TURFFR2021-07-28 09:34:23.6300.01100.240.332021-07-28 09:34:26.2180.04000.011.5116.3
ESCAFR2021-07-28 09:34:23.9700.0120-0.001.582021-07-28 09:34:26.9680.0400-0.150.9619.3
SAOFFR2021-07-28 09:34:25.9420.02000.091.212021-07-28 09:34:29.5800.3237-0.750.1828.7
STVGU2021-07-28 09:34:26.5060.0200-0.041.502021-07-28 09:34:31.2100.2667-0.200.7635.8
ENRGU2021-07-28 09:34:26.5700.0834-0.101.212021-07-28 09:34:31.2500.4188-0.380.5136.9
GBOSGU2021-07-28 09:34:30.9200.03310.081.242021-07-28 09:34:38.3890.0400-0.101.0560.9
SURFFR2021-07-28 09:34:32.3000.03410.051.272021-07-28 09:34:40.9900.2787-0.230.6767.9


Local magnitude (ML) calculation results
Station Net Channels Stat. Mag. Wood-And.
Ampl.
Dist. (km) Azimuth
TURF FRHH0.084.54e-216.376
ESCA FRHH0.621.17e-119.3133
STV GUHH0.481.80e-235.816
ENR GUHH0.322.44e-236.928
GBOS GUHH0.821.02e-260.956


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.
(°)
TURF FRHHZ3.3841e-65.6934e-73.6625e-73.3406e-71.7638e-76.3724e-61.9440e-62.0806e-71.5950e-816.376
TURF FRHHN3.2625e-66.4665e-74.0191e-71.9356e-71.4149e-77.1191e-61.8787e-61.9733e-71.8439e-816.376
TURF FRHHE2.4373e-64.8890e-74.1441e-72.7458e-71.8688e-71.0648e-51.9874e-61.7416e-71.2930e-816.376
ESCA FRHHZ3.9361e-68.6714e-76.3757e-74.2238e-71.6269e-78.8064e-63.5588e-62.3559e-72.3513e-819.3133
ESCA FRHHN6.1899e-61.2865e-69.4793e-76.8176e-72.0585e-71.5162e-52.8281e-62.6312e-73.4347e-819.3133
ESCA FRHHE5.2072e-61.1637e-69.6061e-75.2217e-71.9821e-71.2468e-55.1536e-62.8796e-72.8364e-819.3133
STV GUHHZ1.1866e-61.7619e-71.0307e-77.2779e-84.7038e-82.8281e-64.6119e-76.4535e-84.3873e-935.816
STV GUHHN1.0847e-61.6624e-71.4305e-79.2653e-85.2929e-83.3780e-66.2396e-76.5010e-85.2644e-935.816
STV GUHHE1.6939e-62.2969e-71.3487e-77.3488e-84.5384e-83.3661e-67.1044e-76.2814e-85.9726e-935.816
ENR GUHHZ1.1991e-61.5150e-71.2546e-76.8588e-83.3873e-83.0695e-66.0446e-74.3016e-84.5449e-936.928
ENR GUHHN4.2060e-64.8293e-72.1632e-78.5763e-85.0993e-85.5202e-69.9735e-77.4870e-81.1123e-836.928
ENR GUHHE2.7898e-64.3744e-72.4607e-71.3918e-74.7495e-84.5679e-61.2400e-66.7027e-81.0757e-836.928
GBOS GUHHZ5.5670e-71.2442e-78.7398e-88.1477e-83.0218e-81.5402e-63.0169e-73.4458e-84.1180e-960.956
GBOS GUHHN6.0978e-71.1275e-77.3917e-85.5742e-82.1152e-81.5204e-62.2422e-72.3214e-83.0138e-960.956
GBOS GUHHE6.0112e-71.1634e-78.7070e-84.9278e-81.7141e-81.6310e-62.9904e-71.9949e-82.9557e-960.956
*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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