Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.9 on date 24-09-2021 and time 05:16:38 (UTC) in region 4 km E Norcia (PG)

A magnitude ML 1.9 earthquake occured in region: 4 km E Norcia (PG), on

  • 24-09-2021 05:16:38 (UTC)
  • 24-09-2021 07:16:38 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.7910, 13.1460 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.

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Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Norcia PG 4 4957 4957
Castelsantangelo sul Nera MC 12 281 5238
Arquata del Tronto AP 13 1178 6416
Preci PG 13 724 7140
Cascia PG 13 3217 10357
Accumoli RI 14 667 11024
Visso MC 16 1107 12131
Montegallo AP 16 523 12654
Ussita MC 17 444 13098
Cerreto di Spoleto PG 19 1075 14173
Poggiodomo PG 19 117 14290
Cittareale RI 19 482 14772
Montemonaco AP 19 604 15376

Municipalities with at least 50000 inhabitants

An earthquake occurred to
40 Km E of Foligno (57155 inhabitants)
48 Km NE of Terni (111501 inhabitants)
48 Km W of Teramo (54892 inhabitants)
53 Km NW of L'Aquila (69753 inhabitants)
71 Km SE of Perugia (166134 inhabitants)
88 Km W of Montesilvano (53738 inhabitants)
94 Km NE of Guidonia Montecelio (88673 inhabitants)
95 Km W of Pescara (121014 inhabitants)
95 Km E of Viterbo (67173 inhabitants)
96 Km NE of Tivoli (56533 inhabitants)
97 Km SW of Ancona (100861 inhabitants)
97 Km NW of Chieti (51815 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 1.9 2021-09-24
05:16:38		 42.791 13.1455 9 2022-03-30
13:04:09		 Bollettino Sismico Italiano INGV 96256801
Reviewed
Rev100 		ML 1.9 2021-09-24
05:16:38		 42.7942 13.1392 9 2021-09-24
05:26:22		 Sala Sismica INGV-Roma 95810351
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-24 05:16:38 ± 0.04
Latitude 42.7910 ± 0.0018
Longitude 13.1455 ± 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 96256801

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 295
Semi-minor axis of confidence ellipse (meter) 147
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 79
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) 49
Number of associated phases, regardless of their use for origin computation 57
Number of defining phases 57
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.24
Epicentral distance of station closest to the epicenter (degree) 0.04856
Epicentral distance of station farthest from the epicenter (degree) 0.72845
Number of stations at which the event was observed 31
Number of stations from which data was used for origin computation 31
Magnitudes information

ML:1.9

Field Value
Value 1.9
Uncertainty 0.3
Num. used stations 78
Type of magnitude ML
Reference to an origin 95810351
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-24 05:26:22

ML:1.9

Field Value
Value 1.9
Uncertainty 0.3
Num. used stations 78
Type of magnitude ML
Reference to an origin 96256801
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-02-18 13:34:59
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ATCC.EHZ. 2021-09-24T05:16:57.64 0.6 undecidable manual S 317 59.9955 50 0.71 39
IV.EL6.EHZ. 2021-09-24T05:16:57.50 0.6 undecidable manual S 357 59.7957 50 0.6 40
IV.SNTG.HHZ. 2021-09-24T05:16:55.50 0.6 undecidable manual S 342 54.1014 50 0.13 46
IV.ASSB.HHZ. 2021-09-24T05:16:53.72 0.6 undecidable manual S 305 48.4182 50 -0.13 46
IV.MOMA.HHZ. 2021-09-24T05:16:53.80 1.0 undecidable manual S 272 46.8198 50 0.36 22
IV.ARVD.HHZ. 2021-09-24T05:16:52.08 0.3 undecidable manual P 348 80.1642 50 -0.01 67
IV.SAP2.EHZ. 2021-09-24T05:16:52.47 1.0 undecidable manual S 31 39.627 50 0.95 18
IV.T0110.HHZ. 2021-09-24T05:16:52.39 0.6 undecidable manual P 140 80.8635 50 0.19 43
IV.ARRO.EHZ. 2021-09-24T05:16:52.10 0.3 undecidable manual S 233 38.8278 50 0.79 58
IV.MURB.HHZ. 2021-09-24T05:16:51.04 0.6 undecidable manual P 316 72.6717 50 0.11 44
IV.TERO.HHZ. 2021-09-24T05:16:51.60 1.0 undecidable manual S 116 41.7249 50 -0.48 22
IV.MML1.EHZ. 2021-09-24T05:16:51.02 0.6 undecidable manual S 339 38.4282 50 -0.18 47
IV.GUMA.HHZ. 2021-09-24T05:16:50.10 0.3 undecidable manual S 27 33.8439 50 0.13 71
IV.MF5.EHZ. 2021-09-24T05:16:50.55 0.6 undecidable manual S 49 33.6441 50 0.65 41
IV.CAMP.HHZ. 2021-09-24T05:16:50.05 1.0 undecidable manual S 143 35.5422 50 -0.37 23
IV.RM33.EHZ. 2021-09-24T05:16:49.07 0.6 undecidable manual S 170 31.746 50 -0.34 46
IV.CSP1.EHZ. 2021-09-24T05:16:49.50 0.3 undecidable manual S 8 33.744 50 -0.43 67
IV.ATCC.EHZ. 2021-09-24T05:16:49.00 0.3 undecidable manual P 317 59.9955 50 0.03 69
IV.CING.HHZ. 2021-09-24T05:16:49.65 0.3 undecidable manual P 4 64.9905 50 -0.1 68
IV.EL6.EHZ. 2021-09-24T05:16:48.84 0.1 undecidable manual P 357 59.7957 50 -0.11 91
IV.CESI.HHZ. 2021-09-24T05:16:48.90 0.6 undecidable manual S 321 30.747 50 -0.24 47
IV.FDMO.HHZ. 2021-09-24T05:16:47.80 0.3 undecidable manual S 350 27.6501 109 -0.43 68
IV.MNTT.EHZ. 2021-09-24T05:16:47.76 0.6 undecidable manual P 50 47.3193 50 0.73 39
IV.SNTG.HHZ. 2021-09-24T05:16:47.90 0.3 undecidable manual P 342 54.1014 50 -0.17 68
IT.MTCL.HGZ. 2021-09-24T05:16:47.11 0.6 undecidable manual S 332 25.4523 110 -0.41 45
IV.MOMA.HHZ. 2021-09-24T05:16:46.99 0.3 undecidable manual P 272 46.8198 50 0.04 71
IV.GAVE.EHZ. 2021-09-24T05:16:46.80 0.3 undecidable manual S 242 23.2545 112 0.01 74
IV.ASSB.HHZ. 2021-09-24T05:16:46.97 0.1 positive manual P 305 48.4182 50 -0.22 91
IV.SMA1.EHZ. 2021-09-24T05:16:46.70 0.6 undecidable manual S 139 23.5542 112 -0.21 48
IV.LNSS.HHZ. 2021-09-24T05:16:46.74 0.6 undecidable manual S 202 22.5552 113 0.16 48
IV.SAP2.EHZ. 2021-09-24T05:16:46.13 0.3 undecidable manual P 31 39.627 50 0.28 68
IV.T1299.HNE. 2021-09-24T05:16:46.46 0.6 undecidable manual S 147 20.6682 114 0.49 45
IV.TERO.HHZ. 2021-09-24T05:16:45.86 0.1 undecidable manual P 116 41.7249 50 -0.31 90
IV.FEMA.HNZ. 2021-09-24T05:16:45.87 0.6 undecidable manual S 338 20.5683 115 -0.06 49
IV.GUMA.HHZ. 2021-09-24T05:16:45.06 0.1 positive manual P 27 33.8439 50 0.11 95
IV.ARRO.EHZ. 2021-09-24T05:16:45.59 0.1 positive manual P 233 38.8278 50 -0.14 94
IV.MTRA.HNZ. 2021-09-24T05:16:45.70 0.1 undecidable manual S 100 20.7681 114 -0.32 93
IV.MF5.EHZ. 2021-09-24T05:16:45.11 0.1 positive manual P 49 33.6441 50 0.2 94
IV.MMO1.EHZ. 2021-09-24T05:16:45.50 0.3 undecidable manual S 51 19.0698 116 0.04 75
IV.MML1.EHZ. 2021-09-24T05:16:45.48 0.1 undecidable manual P 339 38.4282 50 -0.18 93
IV.CAMP.HHZ. 2021-09-24T05:16:44.95 0.3 undecidable manual P 143 35.5422 50 -0.26 69
IV.MC2.EHZ. 2021-09-24T05:16:44.30 0.1 undecidable manual S 15 13.7751 124 0.4 93
IV.CSP1.EHZ. 2021-09-24T05:16:44.65 0.1 undecidable manual P 8 33.744 50 -0.28 92
IV.RM33.EHZ. 2021-09-24T05:16:44.32 0.1 undecidable manual P 170 31.746 50 -0.31 92
IV.CESI.HHZ. 2021-09-24T05:16:44.29 0.1 undecidable manual P 321 30.747 50 -0.19 94
IT.MTCL.HGZ. 2021-09-24T05:16:43.36 0.1 undecidable manual P 332 25.4523 110 -0.18 95
IV.GAVE.EHZ. 2021-09-24T05:16:43.18 0.1 positive manual P 242 23.2545 112 0.06 98
IV.FDMO.HHZ. 2021-09-24T05:16:43.73 0.1 positive manual P 350 27.6501 109 -0.22 94
IV.SMA1.EHZ. 2021-09-24T05:16:43.16 0.1 undecidable manual P 139 23.5542 112 -0.03 99
IV.LNSS.HHZ. 2021-09-24T05:16:43.06 0.1 positive manual P 202 22.5552 113 0.06 98
IV.T1299.HNE. 2021-09-24T05:16:42.93 0.1 undecidable manual P 147 20.6682 114 0.28 94
IV.MMO1.EHZ. 2021-09-24T05:16:42.35 0.1 positive manual P 51 19.0698 116 0 100
IV.FEMA.HNZ. 2021-09-24T05:16:42.73 0.1 undecidable manual P 338 20.5683 115 0.11 98
IV.MTRA.HNZ. 2021-09-24T05:16:42.64 0.1 undecidable manual P 100 20.7681 114 -0.03 99
IV.MC2.EHZ. 2021-09-24T05:16:41.75 0.1 positive manual P 15 13.7751 124 0.3 95
IV.NRCA.HNZ. 2021-09-24T05:16:41.70 0.1 undecidable manual S 332 5.3946 150 -0.16 99
IV.NRCA.HNZ. 2021-09-24T05:16:40.50 0.1 negative manual P 332 5.3946 150 0.23 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HNE. ML:2.5 0.0059700000000000005 0.16 AML other m 2021-09-24T05:16:41.81
IV.NRCA.HHE. ML:2.5 0.0053811250000000005 0.0992 AML other m 2021-09-24T05:16:41.81
IV.NRCA.HNN. ML:2.4 0.004890296 0.0896 AML other m 2021-09-24T05:16:41.81
IV.NRCA.HHN. ML:2.5 0.005824039499999999 0.0992 AML other m 2021-09-24T05:16:41.81
IV.MTRA.HNN. ML:2.1 0.0008543524 0.2176 AML other m 2021-09-24T05:16:46.10
IV.MTRA.EHN. ML:2.1 0.00087213615 0.2176 AML other m 2021-09-24T05:16:46.10
IV.MTRA.HNE. ML:2.2 0.00121 0.22 AML other m 2021-09-24T05:16:46.46
IV.MTRA.EHE. ML:2.2 0.001215 0.22 AML other m 2021-09-24T05:16:46.47
IV.LNSS.HNE. ML:2.6 0.0026115874999999996 0.2688 AML other m 2021-09-24T05:16:47.05
IV.LNSS.HHN. ML:2.7 0.003395 0.2 AML other m 2021-09-24T05:16:47.09
IV.LNSS.HNN. ML:2.7 0.003115 0.2 AML other m 2021-09-24T05:16:47.09
IV.LNSS.HHE. ML:2.6 0.002547298 0.3008 AML other m 2021-09-24T05:16:47.04
IV.GAVE.HNN. ML:1.6 0.00025752482 0.112 AML other m 2021-09-24T05:16:47.61
IV.GAVE.EHN. ML:2.1 0.0007796959500000001 0.1216 AML other m 2021-09-24T05:16:47.61
IV.GAVE.EHE. ML:2.1 0.0008195 0.12 AML other m 2021-09-24T05:16:47.90
IV.GAVE.HNE. ML:2.1 0.0008535 0.12 AML other m 2021-09-24T05:16:47.90
IV.FDMO.HHE. ML:1.8 0.0003305 0.14 AML other m 2021-09-24T05:16:48.42
IV.FDMO.HHN. ML:1.8 0.00032700000000000003 0.22 AML other m 2021-09-24T05:16:48.63
IV.CESI.HNN. ML:1.8 0.00027719954999999997 0.0896 AML other m 2021-09-24T05:16:49.14
IV.CESI.HHN. ML:1.8 0.00030577515 0.0992 AML other m 2021-09-24T05:16:49.14
IV.CING.HNN. ML:3.4 0.0053318919999999995 1.328 AML other m 2021-09-24T05:16:49.87
IV.CESI.HNE. ML:1.4 0.000121392765 0.1216 AML other m 2021-09-24T05:16:49.64
IV.CESI.HHE. ML:1.5 0.00014268330000000002 0.1216 AML other m 2021-09-24T05:16:49.64
IV.RM33.HNN. ML:1.6 0.00017750549999999998 0.1088 AML other m 2021-09-24T05:16:49.72
IV.CSP1.EHE. ML:2.2 0.000731314 1.7408 AML other m 2021-09-24T05:16:49.97
IV.CSP1.EHN. ML:2.2 0.0007695 1.66 AML other m 2021-09-24T05:16:50.88
IV.RM33.HNE. ML:1.7 0.00021265905000000002 1.8496 AML other m 2021-09-24T05:16:50.07
IV.RM33.EHE. ML:1.7 0.0002165 1.84 AML other m 2021-09-24T05:16:50.99
IV.CAMP.HHE. ML:1.5 0.000127 0.18 AML other m 2021-09-24T05:16:50.56
IV.CAMP.HHN. ML:1.4 0.000092 0.18 AML other m 2021-09-24T05:16:50.57
IV.GUMA.HHE. ML:2.0 0.0004545 1.56 AML other m 2021-09-24T05:16:50.85
IV.RM33.EHN. ML:1.6 0.00017213115 0.16 AML other m 2021-09-24T05:16:51.13
IV.SMA1.EHN. ML:1.6 0.00028700000000000004 1.76 AML other m 2021-09-24T05:16:51.09
IV.SNTG.HNN. ML:1.7 0.00011654759000000001 1.2032 AML other m 2021-09-24T05:16:51.38
IV.GUMA.HNN. ML:2.1 0.0005965801 0.24 AML other m 2021-09-24T05:16:51.52
IV.GUMA.HHN. ML:2.2 0.00078006785 0.2208 AML other m 2021-09-24T05:16:51.52
IV.MML1.EHN. ML:2.0 0.0003369347 0.1984 AML other m 2021-09-24T05:16:51.68
IV.MML1.HNN. ML:2.0 0.0003435 0.2 AML other m 2021-09-24T05:16:51.68
IV.MML1.EHE. ML:2.1 0.00041600000000000003 0.14 AML other m 2021-09-24T05:16:51.70
IV.MML1.HNE. ML:2.0 0.0003875 0.14 AML other m 2021-09-24T05:16:51.70
IV.MF5.EHN. ML:1.6 0.00015344347 1.8208 AML other m 2021-09-24T05:16:51.06
IV.SMA1.EHE. ML:1.7 0.0003293969 1.68 AML other m 2021-09-24T05:16:52.99
IV.MF5.EHE. ML:1.7 0.000215 0.26 AML other m 2021-09-24T05:16:52.06
IV.TERO.HHN. ML:1.6 0.00014214644999999997 0.08 AML other m 2021-09-24T05:16:52.55
IV.TERO.HNN. ML:1.7 0.0001783368 0.0896 AML other m 2021-09-24T05:16:52.56
IV.GUMA.HNE. ML:2.0 0.00043257445 0.2304 AML other m 2021-09-24T05:16:52.58
IV.TERO.HNE. ML:1.5 0.00011473718000000001 0.08 AML other m 2021-09-24T05:16:52.84
IV.SAP2.EHN. ML:2.6 0.0013797895 0.1792 AML other m 2021-09-24T05:16:53.18
IV.ARRO.EHE. ML:1.5 0.00011649999999999999 0.2 AML other m 2021-09-24T05:16:53.53
IV.ARRO.EHN. ML:1.6 0.00014050000000000003 0.16 AML other m 2021-09-24T05:16:53.71
IV.SAP2.EHE. ML:1.8 0.00023434755 0.1408 AML other m 2021-09-24T05:16:54.42
IV.ASSB.HHE. ML:1.6 0.0001215 0.14 AML other m 2021-09-24T05:16:54.66
IV.MOMA.HNE. ML:1.9 0.00020850000000000003 0.3 AML other m 2021-09-24T05:16:55.24
IV.MOMA.HHE. ML:1.9 0.00021550000000000003 0.18 AML other m 2021-09-24T05:16:55.24
IV.MOMA.HNN. ML:1.8 0.00017294940000000001 0.1312 AML other m 2021-09-24T05:16:55.49
IV.MOMA.HHN. ML:1.8 0.000177 0.12 AML other m 2021-09-24T05:16:55.43
IV.ASSB.HHN. ML:1.7 0.00014743430000000002 0.16 AML other m 2021-09-24T05:16:55.56
IV.SNTG.HHE. ML:1.5 0.000076 1.38 AML other m 2021-09-24T05:16:55.17
IV.MNTT.EHN. ML:2.3 0.000568 0.18 AML other m 2021-09-24T05:16:57.41
IV.SNTG.HHN. ML:1.5 0.00008049999999999999 0.26 AML other m 2021-09-24T05:16:57.64
IV.MNTT.EHE. ML:2.6 0.001085 0.16 AML other m 2021-09-24T05:16:57.89
IV.SNTG.HNE. ML:1.6 0.000096837565 0.3488 AML other m 2021-09-24T05:16:58.24
IV.EL6.EHN. ML:2.0 0.0002163467 0.16 AML other m 2021-09-24T05:16:58.08
IV.ATCC.EHE. ML:1.6 0.00009120000000000001 0.14 AML other m 2021-09-24T05:16:58.67
IV.ATCC.EHN. ML:1.5 0.00007230000000000001 0.8 AML other m 2021-09-24T05:16:59.46
IV.CING.HHE. ML:1.6 0.00008015 0.88 AML other m 2021-09-24T05:16:59.90
IV.CING.HHN. ML:1.7 0.0000991 0.1 AML other m 2021-09-24T05:16:59.66
IV.EL6.EHE. ML:1.9 0.0001615 0.26 AML other m 2021-09-24T05:17:00.47
IV.CING.HNE. ML:3.4 0.004647374 0.72 AML other m 2021-09-24T05:17:02.00
IV.ARVD.HHE. ML:1.6 0.00004915 1.36 AML other m 2021-09-24T05:17:03.83
IV.ARVD.HHN. ML:1.3 0.0000264 0.12 AML other m 2021-09-24T05:17:03.91
IV.MURB.HNN. ML:2.0 0.000161995105 0.2688 AML other m 2021-09-24T05:17:04.83
IV.MURB.HHN. ML:1.9 0.0001265 0.22 AML other m 2021-09-24T05:17:05.58
IV.TERO.HHE. ML:2.0 0.00032732115 0.5184 AML other m 2021-09-24T05:17:05.71
IV.MURB.HNE. ML:2.0 0.00015170155000000001 0.3296 AML other m 2021-09-24T05:17:06.65
IV.MURB.HHE. ML:1.8 0.00010543605 0.3392 AML other m 2021-09-24T05:17:08.08
IV.T0110.HHE. ML:1.6 0.00004770000000000001 0.36 AML other m 2021-09-24T05:17:12.32
IV.T0110.HHN. ML:1.6 0.00006075 0.32 AML other m 2021-09-24T05:17:13.91
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