RSNI - Manually revised location

MANUAL Location - Area: Alpi Graie , magnitude (M_L): 0.2
2021-04-16 03:45:01 (UTC)

Regional Seismic Network of Northwestern Italy (Distav, University of Genoa)
Posted on: 2021-04-16 06:53:00

Earthquake info - Manual location

Event - ID :	210416034410
Magnitude (M_L) :	0.2 +/- 0.2
Origin Time :	2021-04-16 03:45:01.571 (UTC)
Location :	Latitude: 45.590 N, Longitude: 6.862 E
Area :	Alpi Graie
Depth (km) :	6.01
Distances (km) :	15.7 --- La Thuile 16.3 --- Valgrisenche 20.0 --- Rhemes-Notre-Dame 21.6 --- Pre -Saint-Didier 23.1 --- Morgex 23.8 --- La Salle 23.9 --- Rhemes-Saint-Georges 24.2 --- Courmayeur 25.4 --- Avise 26.8 --- Arvier 27.0 --- Valsavarenche 27.5 --- Saint-Nicolas 27.6 --- Introd 29.6 --- Villeneuve 31.5 --- Saint-Pierre 32.2 --- Aymavilles 33.8 --- Ceresole Reale 33.9 --- Sarre 34.9 --- Jovencan 35.7 --- Saint-Rhemy-En-Bosses

Quality location estimate: Erh: 0.9 km, Erz: 2.2 km, Nf: 20, Gap: 101 °, Rms: 0.25

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.
RSL	FR	2021-04-16 03:45:06.110	0.020	1	-0.02	1.60	2021-04-16 03:45:08.469	0.049	1	-0.67	0.54	22.7
MRGE	IV	2021-04-16 03:45:07.084	0.023	1	0.05	1.47	2021-04-16 03:45:10.159	0.100	2	-0.52	0.69	26.4
BLANC	GU	2021-04-16 03:45:07.709	0.020	0	0.03	1.52	2021-04-16 03:45:11.558	0.040	0	-0.24	1.12	30.3
REMY	GU	2021-04-16 03:45:08.867	0.020	0	-0.04	1.56	2021-04-16 03:45:13.335	0.232	6	-0.53	0.79	36.7
OGMO	FR	2021-04-16 03:45:10.032	0.030	1	0.14	0.82	2021-04-16 03:45:15.278	0.040	0	-0.24	1.16	45.1
CIRO	GU	2021-04-16 03:45:11.456	0.020	0	-0.74	0.48	2021-04-16 03:45:18.209	0.040	0	-1.00	0.16	55.6
RSP	GU	2021-04-16 03:45:12.659	0.020	0	0.45	0.05	2021-04-16 03:45:19.379	0.040	0	-0.03	1.29	58.8
BNI	MN	2021-04-16 03:45:12.547	0.020	0	-0.28	1.04	2021-04-16 03:45:19.993	0.040	0	-0.54	0.74	61.8
TRAV	GU	2021-04-16 03:45:13.810	0.020	0	-0.22	1.19	2021-04-16 03:45:21.983	0.040	0	-0.18	1.22	69.7
RRL	GU	2021-04-16 03:45:15.080	0.020	0	0.02	1.35	2021-04-16 03:45:24.188	0.040	0	-0.14	1.21	75.1

Local magnitude (M_L) calculation results

Station	Net	Channels	Stat. Mag.	Wood-And. Ampl.	Dist. (km)	Azimuth
RSL	FR	HH	0.00	2.10e-2	22.7	301
MRGE	IV	HH	0.34	2.95e-2	26.4	38
BLANC	GU	HH	-0.09	9.96e-3	30.3	11
REMY	GU	HH	0.11	1.09e-2	36.7	40
CIRO	GU	HH	0.22	3.29e-3	55.6	88
RSP	GU	HH	0.36	8.04e-3	58.8	147
TRAV	GU	HH	0.19	4.17e-3	69.7	97
RRL	GU	HH	0.31	2.67e-3	75.1	184

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.
(°)

RSL

HHZ

1.6317e-6

2.5867e-7

1.0690e-7

3.4690e-8

1.9187e-8

1.9157e-6

4.0750e-7

2.8725e-8

5.6896e-9

22.7

301

RSL

HHN

2.4602e-6

3.6197e-7

1.5935e-7

4.6971e-8

2.6041e-8

3.8697e-6

5.9059e-7

4.4111e-8

9.1053e-9

22.7

301

RSL

HHE

2.3957e-6

3.9264e-7

1.5251e-7

4.9027e-8

2.3450e-8

4.3985e-6

5.9284e-7

4.2410e-8

8.0674e-9

22.7

301

MRGE

HHZ

3.9523e-6

3.2250e-7

9.8817e-8

3.7848e-8

1.8570e-8

3.3763e-6

5.8835e-7

2.6904e-8

6.5305e-9

26.4

MRGE

HHN

1.0912e-5

1.0172e-6

1.6172e-7

5.3343e-8

2.9894e-8

1.1950e-5

6.7371e-7

7.0842e-8

1.6977e-8

26.4

MRGE

HHE

7.8568e-6

7.6878e-7

1.3745e-7

4.5958e-8

2.5542e-8

6.4655e-6

6.4528e-7

5.6146e-8

1.3872e-8

26.4

BLANC

HHZ

1.0256e-6

1.3048e-7

6.5847e-8

2.2608e-8

1.1471e-8

1.3762e-6

3.6793e-7

1.4575e-8

2.8412e-9

30.3

BLANC

HHN

1.9572e-6

2.3700e-7

6.2083e-8

2.4093e-8

1.5276e-8

1.9368e-6

2.7307e-7

2.3968e-8

4.2318e-9

30.3

BLANC

HHE

1.4434e-6

1.9539e-7

8.8829e-8

3.4218e-8

2.0016e-8

2.6752e-6

4.5212e-7

2.9866e-8

4.1376e-9

30.3

REMY

HHZ

8.3966e-7

1.2972e-7

6.6378e-8

2.9071e-8

1.3481e-8

1.9365e-6

2.4229e-7

1.5267e-8

2.9089e-9

36.7

REMY

HHN

8.6568e-7

1.6590e-7

9.4638e-8

4.5493e-8

2.0771e-8

2.1447e-6

3.4890e-7

2.8191e-8

3.5578e-9

36.7

REMY

HHE

1.0489e-6

1.2185e-7

7.2489e-8

3.3644e-8

1.3642e-8

2.1238e-6

2.5518e-7

1.7194e-8

3.1780e-9

36.7

CIRO

HHZ

4.2419e-7

4.5147e-8

1.7267e-8

6.8266e-9

4.2643e-9

7.7369e-7

8.8654e-8

6.4320e-9

9.4312e-10

55.6

CIRO

HHN

6.5222e-7

6.1082e-8

2.3166e-8

1.1660e-8

1.5463e-8

9.9921e-7

1.1137e-7

2.6944e-8

3.4245e-9

55.6

CIRO

HHE

3.6050e-7

4.1853e-8

1.5843e-8

7.9443e-9

5.0081e-9

9.1285e-7

5.7960e-8

6.4041e-9

9.1319e-10

55.6

RSP

HHZ

1.3108e-6

1.2636e-7

3.8295e-8

1.3215e-8

9.4733e-9

1.1999e-6

1.6132e-7

1.4878e-8

2.4220e-9

58.8

147

RSP

HHN

1.2132e-6

1.4843e-7

6.6078e-8

1.9278e-8

1.1792e-8

1.9745e-6

2.9640e-7

2.0186e-8

3.0945e-9

58.8

147

RSP

HHE

9.8483e-7

1.4968e-7

7.1411e-8

2.3233e-8

1.3711e-8

2.5050e-6

2.9722e-7

2.4671e-8

3.5297e-9

58.8

147

TRAV

HHZ

4.7499e-7

5.8391e-8

2.5347e-8

1.4371e-8

7.9591e-9

7.1382e-7

1.4808e-7

1.1879e-8

1.1727e-9

69.7

TRAV

HHN

7.4207e-7

1.0981e-7

3.9648e-8

1.5858e-8

8.7321e-9

1.2337e-6

2.0109e-7

1.1935e-8

2.1872e-9

69.7

TRAV

HHE

5.2909e-7

6.9774e-8

3.3883e-8

1.5620e-8

8.3990e-9

9.5826e-7

1.9463e-7

1.2761e-8

1.5037e-9

69.7

RRL

HHZ

2.4807e-7

4.8145e-8

1.3041e-8

9.5230e-9

6.9551e-9

4.9947e-7

7.5439e-8

1.0437e-8

8.7678e-10

75.1

184

RRL

HHN

2.1637e-7

2.8034e-8

2.2103e-8

1.1393e-8

7.9714e-9

3.9334e-7

1.1227e-7

1.4250e-8

9.6135e-10

75.1

184

RRL

HHE

1.5553e-7

2.6114e-8

2.1106e-8

1.1558e-8

8.7951e-9

4.0921e-7

1.2725e-7

1.2707e-8

9.7803e-10

75.1

184

*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 Graie , magnitude (ML): 0.2 2021-04-16 03:45:01 (UTC)

MANUAL Location - Area: Alpi Graie , magnitude (M_L): 0.2
2021-04-16 03:45:01 (UTC)