Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.7 on date 08-09-2021 and time 23:51:48 (Italy) in region 4 km S Preci (PG)

A magnitude ML 1.7 earthquake occured in region: 4 km S Preci (PG), on

  • 08-09-2021 21:51:48 (UTC)
  • 08-09-2021 23:51:48 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.8430, 13.0310 at 9 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

Search earthquakes: Any within 30 km radius

The values of hypocentral coordinates and magnitude may be revised at a later time as more information becomes available.

Hai sentito il terremoto? Clicca qui

Did you feel it? Fill in the questionnaire.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Preci PG 4 724 724
Norcia PG 8 4957 5681
Cerreto di Spoleto PG 10 1075 6756
Sellano PG 10 1079 7835
Visso MC 11 1107 8942
Castelsantangelo sul Nera MC 12 281 9223
Cascia PG 14 3217 12440
Ussita MC 14 444 12884
Vallo di Nera PG 16 364 13248
Poggiodomo PG 17 117 13365
Monte Cavallo MC 17 145 13510
Sant'Anatolia di Narco PG 20 564 14074

Municipalities with at least 50000 inhabitants

An earthquake occurred to
30 Km E of Foligno (57155 inhabitants)
44 Km NE of Terni (111501 inhabitants)
59 Km W of Teramo (54892 inhabitants)
60 Km E of Perugia (166134 inhabitants)
62 Km NW of L'Aquila (69753 inhabitants)
89 Km NE of Viterbo (67173 inhabitants)
95 Km SW of Ancona (100861 inhabitants)
97 Km N of Guidonia Montecelio (88673 inhabitants)
99 Km W of Montesilvano (53738 inhabitants)
100 Km N of Tivoli (56533 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Bulletin
Rev1000 		ML 1.7 2021-09-08
21:51:48		 42.8433 13.0313 9 2022-03-30
13:04:31		 Bollettino Sismico Italiano INGV 99867951
Reviewed
Rev100 		ML 1.6 2021-09-08
21:51:48		 42.84 13.0293 8 2021-09-08
21:58:17		 Sala Sismica INGV-Roma 95210061
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-08 21:51:48 ± 0.04
Latitude 42.8433 ± 0.0018
Longitude 13.0313 ± 0.0037
Depth (km) 9 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 99867951

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 294
Semi-minor axis of confidence ellipse (meter) 147
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 80
Circular confidence region, given by single value of horizontal uncertainty (meter) 290.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 42
Number of associated phases, regardless of their use for origin computation 50
Number of defining phases 48
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.2
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.83457
Number of stations at which the event was observed 34
Number of stations from which data was used for origin computation 32
Magnitudes information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.3
Num. used stations 50
Type of magnitude ML
Reference to an origin 95210061
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-08 21:58:17

ML:1.7

Field Value
Value 1.7
Uncertainty 0.3
Num. used stations 50
Type of magnitude ML
Reference to an origin 99867951
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-02-24 00:53:37
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.BRSN.EHZ. 2021-09-08T21:52:37.96 3.0 undecidable manual S -0.81 0
IV.RMP.HHZ. 2021-09-08T21:52:10.16 3.0 positive manual P 0.53 0
IV.EL6.EHZ. 2021-09-08T21:52:06.92 0.6 undecidable manual S 6 54.2013 50 0.62 41
IV.NARO.HHZ. 2021-09-08T21:52:04.67 0.6 undecidable manual P 337 92.6406 50 -0.17 42
IV.RM33.EHZ. 2021-09-08T21:52:02.60 0.6 undecidable manual S 158 40.0266 50 0.1 47
IV.ARVD.HHZ. 2021-09-08T21:52:01.82 0.3 undecidable manual P 354 72.9714 50 0 68
IV.ASSB.HHZ. 2021-09-08T21:52:01.73 0.6 undecidable manual S 306 37.4292 50 -0.11 48
IV.PF6.EHN. 2021-09-08T21:52:00.86 0.6 undecidable manual S 22 35.2425 50 -0.38 45
IV.MURB.HHZ. 2021-09-08T21:52:00.13 0.3 undecidable manual P 319 62.0934 50 -0.01 70
IV.MML1.EHZ. 2021-09-08T21:52:00.00 0.6 undecidable manual S 351 30.3474 106 0.18 47
IV.T1299.HNN. 2021-09-08T21:52:00.21 0.6 undecidable manual S 139 30.9468 106 0.2 47
IV.CSP1.EHZ. 2021-09-08T21:51:59.67 0.6 undecidable manual S 27 30.9468 106 -0.35 46
IV.MNTT.EHZ. 2021-09-08T21:51:59.46 0.3 undecidable manual P 62 51.8037 50 0.89 54
IV.CING.HHZ. 2021-09-08T21:51:59.96 0.3 undecidable manual P 13 60.495 50 0.06 69
IV.ATCC.EHZ. 2021-09-08T21:51:58.09 0.3 negative manual P 320 49.4172 50 -0.1 93
IV.TERO.HHZ. 2021-09-08T21:51:58.39 0.3 undecidable manual P 117 52.7028 50 -0.3 67
IV.LNSS.HHZ. 2021-09-08T21:51:58.70 0.3 undecidable manual S 178 26.6511 108 0.1 73
IV.EL6.EHZ. 2021-09-08T21:51:58.83 0.1 undecidable manual P 6 54.2013 50 -0.1 92
IV.SAP2.EHE. 2021-09-08T21:51:57.62 0.6 undecidable manual P 47 41.0256 50 0.72 40
IV.MMO1.EHN. 2021-09-08T21:51:57.92 0.6 undecidable manual S 75 24.8529 109 -0.07 49
IV.CAMP.HHE. 2021-09-08T21:51:57.68 0.6 undecidable manual P 138 45.9207 50 0.02 48
IV.CESX.HHZ. 2021-09-08T21:51:57.39 0.6 undecidable manual P 234 44.622 50 -0.06 47
IV.GAVE.EHZ. 2021-09-08T21:51:56.80 0.6 undecidable manual S 214 20.1687 114 0.32 47
IV.MOMA.HHZ. 2021-09-08T21:51:56.46 0.3 undecidable manual P 264 37.7289 50 0.06 72
IV.RM33.EHZ. 2021-09-08T21:51:56.55 0.3 undecidable manual P 158 40.0266 50 -0.19 70
IV.CESI.HHZ. 2021-09-08T21:51:56.70 0.6 undecidable manual S 330 20.6682 113 0.05 50
IV.GUMA.HHZ. 2021-09-08T21:51:56.00 0.3 undecidable manual P 45 34.6431 50 0.08 72
IV.FDMO.HHZ. 2021-09-08T21:51:56.90 0.6 undecidable manual S 12 21.867 112 -0.15 48
IV.MF5.EHZ. 2021-09-08T21:51:56.75 0.3 undecidable manual P 65 38.3283 50 0.27 69
IV.ASSB.HHZ. 2021-09-08T21:51:56.00 0.1 undecidable manual P 306 37.4292 50 -0.35 90
IV.SMA1.EHZ. 2021-09-08T21:51:55.65 0.6 undecidable manual P 134 34.2435 50 -0.2 47
IV.PF6.EHN. 2021-09-08T21:51:55.91 0.6 undecidable manual P 22 35.2425 50 -0.1 48
IV.ARRO.EHZ. 2021-09-08T21:51:55.89 0.6 undecidable manual P 217 36.4413 50 -0.3 46
IV.CSP1.EHZ. 2021-09-08T21:51:55.12 0.1 undecidable manual P 27 30.9468 106 -0.19 95
IT.MTCL.HGZ. 2021-09-08T21:51:55.59 0.3 undecidable manual S 351 16.872 117 0.13 74
IV.MTRA.EHE. 2021-09-08T21:51:55.12 0.3 undecidable manual P 108 31.2465 106 -0.24 70
IV.MML1.EHZ. 2021-09-08T21:51:55.07 0.1 positive manual P 351 30.3474 106 -0.12 96
IV.T1299.HNN. 2021-09-08T21:51:55.37 0.3 undecidable manual P 139 30.9468 106 0.07 73
IV.FEMA.HNE. 2021-09-08T21:51:54.57 0.6 undecidable manual S 7 13.2756 123 0.2 49
IV.LNSS.HHZ. 2021-09-08T21:51:54.45 0.1 positive manual P 178 26.6511 108 -0.03 98
IV.MC2.EHZ. 2021-09-08T21:51:54.81 0.6 undecidable manual S 59 14.874 120 -0.04 50
IV.MMO1.EHN. 2021-09-08T21:51:54.01 0.1 undecidable manual P 75 24.8529 109 -0.12 97
IV.FDMO.HHZ. 2021-09-08T21:51:53.52 0.1 undecidable manual P 12 21.867 112 -0.06 99
IV.CESI.HHZ. 2021-09-08T21:51:53.35 0.1 negative manual P 330 20.6682 113 0 100
IV.GAVE.EHZ. 2021-09-08T21:51:53.48 0.3 undecidable manual P 214 20.1687 114 0.22 72
IT.MTCL.HGZ. 2021-09-08T21:51:52.64 0.3 undecidable manual P 351 16.872 117 -0.03 75
IV.FEMA.HNE. 2021-09-08T21:51:52.32 0.1 undecidable manual P 7 13.2756 123 0.28 96
IV.MC2.EHZ. 2021-09-08T21:51:52.57 0.1 undecidable manual P 59 14.874 120 0.25 96
IV.NRCA.HNZ. 2021-09-08T21:51:52.30 0.6 undecidable manual S 99 6.8931 142 -0.42 47
IV.NRCA.HNZ. 2021-09-08T21:51:50.95 0.6 undecidable manual P 99 6.8931 142 -0.13 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHE. ML:2.1 0.002105 0.84 AML other m 2021-09-08T21:51:52.90
IV.NRCA.HNE. ML:2.0 0.001905 0.84 AML other m 2021-09-08T21:51:52.90
IV.NRCA.HNN. ML:2.0 0.0016099999999999999 0.36 AML other m 2021-09-08T21:51:53.30
IV.NRCA.HHN. ML:2.0 0.001745 0.36 AML other m 2021-09-08T21:51:53.30
IV.CESI.HHN. ML:1.8 0.000462 1.7 AML other m 2021-09-08T21:51:56.03
IV.GAVE.EHE. ML:2.0 0.000867 0.16 AML other m 2021-09-08T21:51:57.14
IV.GAVE.HNE. ML:2.0 0.0007555000000000001 0.14 AML other m 2021-09-08T21:51:57.14
IV.FDMO.HHN. ML:1.6 0.00029200000000000005 0.24 AML other m 2021-09-08T21:51:57.19
IV.GAVE.HNN. ML:1.6 0.0002915 0.4 AML other m 2021-09-08T21:51:57.22
IV.GAVE.EHN. ML:2.0 0.000847 0.34 AML other m 2021-09-08T21:51:57.40
IV.FDMO.HHE. ML:1.8 0.00039449999999999994 0.32 AML other m 2021-09-08T21:51:57.46
IV.CESI.HHE. ML:1.4 0.000194 0.58 AML other m 2021-09-08T21:51:58.52
IV.LNSS.HHE. ML:1.9 0.000418 0.18 AML other m 2021-09-08T21:52:00.29
IV.LNSS.HHN. ML:1.8 0.0003665 0.2 AML other m 2021-09-08T21:52:00.41
IV.MML1.EHE. ML:1.3 0.00009185 0.32 AML other m 2021-09-08T21:52:01.16
IV.CSP1.EHN. ML:2.0 0.000516 0.4 AML other m 2021-09-08T21:52:01.79
IV.CSP1.EHE. ML:2.0 0.000547 1.54 AML other m 2021-09-08T21:52:02.96
IV.ASSB.HHN. ML:1.4 0.0000859 1.24 AML other m 2021-09-08T21:52:02.35
IV.GUMA.HHE. ML:2.0 0.0003765 0.36 AML other m 2021-09-08T21:52:03.30
IV.MML1.EHN. ML:1.4 0.0001175 1.06 AML other m 2021-09-08T21:52:03.89
IV.ARRO.EHN. ML:1.4 0.00008979999999999999 0.64 AML other m 2021-09-08T21:52:03.71
IV.GUMA.HNE. ML:1.9 0.0003555 0.48 AML other m 2021-09-08T21:52:03.97
IV.GUMA.HHN. ML:2.0 0.0003955 1.12 AML other m 2021-09-08T21:52:03.74
IV.GUMA.HNN. ML:2.0 0.000376 0.68 AML other m 2021-09-08T21:52:03.45
IV.RM33.EHN. ML:1.3 0.00007455000000000001 1.04 AML other m 2021-09-08T21:52:03.34
IV.ASSB.HHE. ML:1.3 0.00007565 0.22 AML other m 2021-09-08T21:52:04.35
IV.RM33.EHE. ML:1.4 0.00009389999999999999 0.64 AML other m 2021-09-08T21:52:04.91
IV.ARRO.EHE. ML:1.4 0.0000934 0.56 AML other m 2021-09-08T21:52:04.83
IV.CESX.HHE. ML:1.7 0.000152 0.66 AML other m 2021-09-08T21:52:05.38
IV.CESX.HHN. ML:1.6 0.0001245 0.46 AML other m 2021-09-08T21:52:05.61
IV.SMA1.EHN. ML:1.6 0.0001615 0.46 AML other m 2021-09-08T21:52:06.70
IV.ATCC.EHE. ML:1.4 0.0000753 0.36 AML other m 2021-09-08T21:52:07.47
IV.EL6.EHN. ML:1.9 0.000175 0.2 AML other m 2021-09-08T21:52:08.19
IV.EL6.EHE. ML:1.8 0.00013965 0.44 AML other m 2021-09-08T21:52:08.40
IV.SMA1.EHE. ML:1.4 0.0001115 0.44 AML other m 2021-09-08T21:52:08.33
IV.MNTT.EHN. ML:1.9 0.00019250000000000002 1.14 AML other m 2021-09-08T21:52:09.10
IV.CING.HHN. ML:1.4 0.000050950000000000005 0.42 AML other m 2021-09-08T21:52:09.93
IV.TERO.HHN. ML:1.2 0.000041 0.76 AML other m 2021-09-08T21:52:10.45
IV.CING.HHE. ML:1.3 0.00004285 0.28 AML other m 2021-09-08T21:52:10.00
IV.ATCC.EHN. ML:1.3 0.0000573 0.9 AML other m 2021-09-08T21:52:11.45
IV.MURB.HHE. ML:1.7 0.0001013 0.24 AML other m 2021-09-08T21:52:12.68
IV.MNTT.EHE. ML:1.8 0.00016849999999999998 0.48 AML other m 2021-09-08T21:52:12.59
IV.ARVD.HHE. ML:1.3 0.00002815 0.88 AML other m 2021-09-08T21:52:13.00
IV.MOMA.HHN. ML:1.6 0.00013419999999999998 1.68 AML other m 2021-09-08T21:52:15.00
IV.MOMA.HHE. ML:1.6 0.0001455 0.4 AML other m 2021-09-08T21:52:15.30
IV.ARVD.HHN. ML:1.1 0.00002075 0.86 AML other m 2021-09-08T21:52:16.67
IV.MURB.HHN. ML:1.7 0.0001061 0.32 AML other m 2021-09-08T21:52:16.35
IV.TERO.HHE. ML:1.8 0.0001415 1.42 AML other m 2021-09-08T21:52:17.93
IV.NARO.HHN. ML:1.0 0.00001247 1.02 AML other m 2021-09-08T21:52:22.27
IV.NARO.HHE. ML:1.1 0.000012865000000000001 0.42 AML other m 2021-09-08T21:52:27.39
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download