RSNI - Manually revised location

MANUAL Location - Area: Alpi Cozie , magnitude (M_L): 0.5
2021-10-21 05:33:34 (UTC)

Regional Seismic Network of Northwestern Italy (Distav, University of Genoa)
Posted on: 2021-10-21 06:59:38

Earthquake info - Manual location

Event - ID :	211021053218
Magnitude (M_L) :	0.5 +/- 0.2
Origin Time :	2021-10-21 05:33:34.036 (UTC)
Location :	Latitude: 44.637 N, Longitude: 6.790 E
Area :	Alpi Cozie
Depth (km) :	2.89
Distances (km) :	18.9 --- Pontechianale 19.0 --- Bellino 22.7 --- Casteldelfino 23.9 --- Acceglio 26.0 --- Elva 27.0 --- Prazzo 29.1 --- Argentera 29.9 --- Crissolo 30.3 --- Stroppo 30.6 --- Canosio 31.2 --- Marmora 32.0 --- Oncino 32.1 --- Ostana 32.2 --- Bobbio Pellice 32.3 --- Sampeyre 33.8 --- Claviere 34.2 --- Sauze di Cesana 34.3 --- Macra 34.6 --- Villar Pellice 34.7 --- Prali

Quality location estimate: Erh: 0.9 km, Erz: 1.1 km, Nf: 20, Gap: 135 °, Rms: 0.18

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.
SURF	FR	2021-10-21 05:33:37.860	0.014	0	0.00	1.95	2021-10-21 05:33:40.230	0.041	1	-0.43	0.64	17.7
OGAG	FR	2021-10-21 05:33:39.324	0.020	0	-0.02	1.90	2021-10-21 05:33:43.050	0.612	9	0.03	0.64	26.2
PZZ	GU	2021-10-21 05:33:40.160	0.065	3	0.02	1.70	2021-10-21 05:33:44.059	0.076	2	-0.50	0.62	29.9
RRL	GU	2021-10-21 05:33:40.525	0.020	0	0.01	1.85	2021-10-21 05:33:44.986	0.601	9	0.04	0.64	31.9
BHB	GU	2021-10-21 05:33:42.606	0.020	0	-0.01	1.71	2021-10-21 05:33:48.010	0.366	8	-0.50	0.65	43.5
BNI	MN	2021-10-21 05:33:44.372	0.080	3	1.07	0.03	2021-10-21 05:33:49.172	0.040	0	-0.58	0.52	47.1
ISO	FR	2021-10-21 05:33:44.442	0.020	0	0.04	1.56	2021-10-21 05:33:50.400	0.300	7	-1.18	0.10	54.6
STV	GU	2021-10-21 05:33:45.108	0.020	0	-0.07	1.43	2021-10-21 05:33:52.849	0.168	5	-0.15	1.04	61.0
ENR	GU	2021-10-21 05:33:46.423	0.020	0	0.20	0.75	2021-10-21 05:33:54.790	0.188	5	-0.00	1.02	67.5
GBOS	GU	2021-10-21 05:33:50.164	0.020	0	-0.47	0.64	2021-10-21 05:34:02.530	0.270	7	0.33	0.60	94.3

Local magnitude (M_L) calculation results

Station	Net	Channels	Stat. Mag.	Wood-And. Ampl.	Dist. (km)	Azimuth
OGAG	FR	HH	0.48	4.90e-2	26.2	310
PZZ	GU	HH	0.66	9.74e-2	29.9	119
RRL	GU	HH	0.25	1.34e-2	31.9	360
BHB	GU	HH	0.28	1.05e-2	43.5	59
ISO	FR	HH	0.49	1.18e-2	54.6	158
STV	GU	HH	0.76	1.18e-2	61.0	135
ENR	GU	HH	0.80	2.12e-2	67.5	132

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.
(°)

OGAG

HHZ

2.4942e-6

3.3858e-7

2.7196e-7

1.0458e-7

6.0373e-8

5.1756e-6

1.3292e-6

8.7677e-8

9.2283e-9

26.2

310

OGAG

HHN

2.5929e-6

5.3412e-7

3.0809e-7

8.6926e-8

4.3018e-8

9.7291e-6

9.5083e-7

6.9529e-8

1.3982e-8

26.2

310

OGAG

HHE

3.1450e-6

6.3892e-7

3.6259e-7

2.0297e-7

8.1530e-8

3.7560e-6

1.6833e-6

1.1142e-7

1.3431e-8

26.2

310

PZZ

HHZ

8.6236e-6

1.1666e-6

5.5164e-7

1.5957e-7

8.0846e-8

1.9889e-5

2.2277e-6

1.2223e-7

2.6326e-8

29.9

119

PZZ

HHN

9.0786e-6

1.5606e-6

8.2006e-7

2.3187e-7

1.3039e-7

2.5795e-5

3.3155e-6

1.8464e-7

3.4040e-8

29.9

119

PZZ

HHE

1.1470e-5

1.4312e-6

8.6434e-7

2.4910e-7

1.3562e-7

2.4322e-5

4.3932e-6

2.0488e-7

3.1096e-8

29.9

119

RRL

HHZ

1.4417e-6

1.9732e-7

7.3439e-8

2.4466e-8

1.4113e-8

3.0453e-6

3.0550e-7

1.8523e-8

3.9575e-9

31.9

360

RRL

HHN

1.3545e-6

2.7701e-7

1.3391e-7

3.5671e-8

1.8697e-8

4.9231e-6

4.7822e-7

2.8128e-8

5.8957e-9

31.9

360

RRL

HHE

1.2607e-6

1.8128e-7

1.3134e-7

5.1016e-8

1.9893e-8

3.2816e-6

4.9740e-7

2.7896e-8

4.4536e-9

31.9

360

BHB

HHZ

2.0950e-6

2.9385e-7

1.2266e-7

3.3009e-8

1.9795e-8

6.6240e-6

4.4556e-7

3.5747e-8

6.2489e-9

43.5

BHB

HHN

1.4088e-6

2.0779e-7

1.0349e-7

2.9083e-8

1.7392e-8

4.3831e-6

5.7173e-7

3.1068e-8

4.2411e-9

43.5

BHB

HHE

1.6394e-6

1.7792e-7

1.0238e-7

3.8074e-8

1.5082e-8

3.8962e-6

3.2830e-7

2.5273e-8

3.9774e-9

43.5

ISO

HHZ

1.4837e-6

1.6455e-7

7.4052e-8

1.8531e-8

1.1877e-8

2.8335e-6

3.2652e-7

1.9527e-8

4.0800e-9

54.6

158

ISO

HHN

1.6051e-6

1.5653e-7

6.0658e-8

1.6993e-8

1.1783e-8

3.4197e-6

3.2540e-7

2.5378e-8

3.7239e-9

54.6

158

ISO

HHE

2.4194e-6

2.3324e-7

9.4837e-8

3.5262e-8

1.7947e-8

3.4388e-6

4.4494e-7

3.3102e-8

5.4242e-9

54.6

158

STV

HHZ

1.6073e-6

2.1608e-7

1.0963e-7

3.7010e-8

3.2588e-8

4.4765e-6

3.9177e-7

4.7184e-8

1.8372e-8

61.0

135

STV

HHN

1.5284e-6

1.9949e-7

8.9335e-8

4.2926e-8

1.7101e-8

3.2001e-6

3.0025e-7

2.1851e-8

4.7951e-9

61.0

135

STV

HHE

1.7366e-6

2.3417e-7

1.0986e-7

3.8705e-8

1.9884e-8

4.1492e-6

3.6173e-7

3.2715e-8

6.2072e-9

61.0

135

ENR

HHZ

1.6973e-6

1.9263e-7

8.2116e-8

3.1244e-8

1.6206e-8

3.5572e-6

2.6767e-7

2.7980e-8

3.9491e-9

67.5

132

ENR

HHN

3.5129e-6

3.4238e-7

1.4293e-7

5.1771e-8

2.5654e-8

5.4488e-6

7.5524e-7

3.5756e-8

6.5817e-9

67.5

132

ENR

HHE

3.3154e-6

3.3125e-7

1.7647e-7

4.9303e-8

2.4556e-8

4.0976e-6

8.6213e-7

3.9185e-8

8.6899e-9

67.5

132

GBOS

HHZ

4.3889e-7

1.2725e-7

7.4468e-8

4.8818e-8

4.1769e-8

1.9302e-6

2.6892e-7

6.3806e-8

1.9581e-8

94.3

117

GBOS

HHN

4.2533e-7

9.5225e-8

8.7646e-8

3.2762e-8

1.9999e-8

1.3220e-6

5.4903e-7

2.5613e-8

2.6750e-9

94.3

117

GBOS

HHE

4.2513e-7

1.3079e-7

8.8304e-8

5.2724e-8

4.3221e-8

1.8933e-6

5.9268e-7

7.8067e-8

1.1840e-8

94.3

117

*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)

MANUAL Location - Area: Alpi Cozie , magnitude (ML): 0.5 2021-10-21 05:33:34 (UTC)

MANUAL Location - Area: Alpi Cozie , magnitude (M_L): 0.5
2021-10-21 05:33:34 (UTC)