Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.8 on date 15-03-2021 and time 21:31:32 (Italy) in region 7 km E Norcia (PG)

A magnitude ML 1.8 earthquake occured in region: 7 km E Norcia (PG), on

  • 15-03-2021 20:31:32 (UTC)
  • 15-03-2021 21:31:32 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.8010, 13.1810 at 11 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 7 4957 4957
Arquata del Tronto AP 10 1178 6135
Castelsantangelo sul Nera MC 11 281 6416
Accumoli RI 13 667 7083
Montegallo AP 13 523 7606
Preci PG 15 724 8330
Montemonaco AP 16 604 8934
Visso MC 16 1107 10041
Ussita MC 16 444 10485
Cascia PG 16 3217 13702
Acquasanta Terme AP 19 2916 16618

Municipalities with at least 50000 inhabitants

An earthquake occurred to
43 Km E of Foligno (57155 inhabitants)
46 Km W of Teramo (54892 inhabitants)
51 Km NE of Terni (111501 inhabitants)
53 Km NW of L'Aquila (69753 inhabitants)
73 Km E of Perugia (166134 inhabitants)
85 Km W of Montesilvano (53738 inhabitants)
92 Km W of Pescara (121014 inhabitants)
95 Km SW of Ancona (100861 inhabitants)
95 Km NW of Chieti (51815 inhabitants)
96 Km NE of Guidonia Montecelio (88673 inhabitants)
98 Km E of Viterbo (67173 inhabitants)
98 Km NE 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 1.8 2021-03-15
20:31:32		 42.8008 13.1808 11 2021-07-12
16:55:16		 Bollettino Sismico Italiano INGV 91494101
Reviewed
Rev100 		ML 1.8 2021-03-15
20:31:32		 42.7993 13.1833 10 2021-03-15
20:37:56		 Sala Sismica INGV-Roma 88169871
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-03-15 20:31:32 ± 0.05
Latitude 42.8008 ± 0.0027
Longitude 13.1808 ± 0.0037
Depth (km) 11 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 91494101

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 327
Semi-minor axis of confidence ellipse (meter) 114
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 69
Circular confidence region, given by single value of horizontal uncertainty (meter) 330.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 35
Number of associated phases, regardless of their use for origin computation 55
Number of defining phases 55
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) 0.05846
Epicentral distance of station farthest from the epicenter (degree) 0.79050
Number of stations at which the event was observed 35
Number of stations from which data was used for origin computation 35
Magnitudes information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.3
Num. used stations 72
Type of magnitude ML
Reference to an origin 88169871
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-03-15 20:37:56

ML:1.8

Field Value
Value 1.8
Uncertainty 0.3
Num. used stations 72
Type of magnitude ML
Reference to an origin 91494101
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-06-18 12:10:32
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MGAB.HHZ. 2021-03-15T20:31:47.76 0.3 undecidable manual P 278 87.7455 50 0.44 61
IV.FRON.EHZ. 2021-03-15T20:31:47.48 0.3 undecidable manual P 335 87.6456 50 0.18 65
IV.SSFR.HHZ. 2021-03-15T20:31:46.06 0.3 undecidable manual P 336 77.5668 50 0.32 64
IV.ARVD.HHZ. 2021-03-15T20:31:46.11 0.6 undecidable manual P 346 79.7646 50 0.03 45
IV.TERO.HHZ. 2021-03-15T20:31:45.33 0.6 undecidable manual S 120 39.7269 50 -0.16 47
IV.T0110.HHZ. 2021-03-15T20:31:45.90 0.6 undecidable manual P 142 79.9644 50 -0.21 44
IV.SAP2.EHZ. 2021-03-15T20:31:45.55 0.3 undecidable manual S 28 37.3293 50 0.71 61
IV.MML1.HNE. 2021-03-15T20:31:45.07 0.6 undecidable manual S 334 38.628 50 -0.12 48
IV.MURB.HHZ. 2021-03-15T20:31:45.46 0.3 undecidable manual P 314 73.8705 50 0.28 65
IV.FAGN.HHZ. 2021-03-15T20:31:44.76 0.3 undecidable manual P 151 67.8765 50 0.5 63
IV.VCEL.EHZ. 2021-03-15T20:31:44.60 0.3 undecidable manual P 130 70.2741 50 -0.01 69
IV.ATCC.EHZ. 2021-03-15T20:31:43.15 0.3 undecidable manual P 314 61.1943 50 -0.07 70
IV.MF5.EHZ. 2021-03-15T20:31:43.85 0.3 undecidable manual S 47 30.747 50 0.77 60
IV.CAMP.HHZ. 2021-03-15T20:31:43.84 0.3 undecidable manual S 148 34.743 50 -0.32 69
IV.CESI.HHZ. 2021-03-15T20:31:43.27 0.3 undecidable manual S 315 31.8459 50 -0.12 73
IV.GUMA.HHZ. 2021-03-15T20:31:43.59 0.3 undecidable manual S 23 31.6461 50 0.27 70
IV.CSP1.EHZ. 2021-03-15T20:31:43.17 0.3 undecidable manual S 3 32.3454 50 -0.34 69
IV.RM33.EHZ. 2021-03-15T20:31:43.84 0.3 undecidable manual S 175 32.4453 50 0.29 70
IV.FIAM.HHZ. 2021-03-15T20:31:42.88 0.3 undecidable manual P 185 59.2962 50 -0.05 70
IV.GAVE.EHZ. 2021-03-15T20:31:42.02 0.6 undecidable manual S 243 26.2515 50 0.13 49
IV.EL6.EHZ. 2021-03-15T20:31:42.80 0.3 undecidable manual P 354 58.9965 50 -0.09 70
IV.LNSS.HHZ. 2021-03-15T20:31:41.71 0.3 undecidable manual S 208 24.753 50 0.22 72
IV.CESX.HHZ. 2021-03-15T20:31:41.95 0.3 undecidable manual P 246 52.9026 50 0.01 72
IV.OFFI.HHZ. 2021-03-15T20:31:41.03 0.3 undecidable manual P 70 43.623 50 0.51 65
IV.FDMO.HHZ. 2021-03-15T20:31:41.77 0.6 undecidable manual S 344 27.2505 50 -0.38 46
IV.MOMA.HHZ. 2021-03-15T20:31:41.46 0.3 undecidable manual P 271 49.7169 50 0.01 72
IT.MTCL.HGZ. 2021-03-15T20:31:41.30 0.6 undecidable manual S 326 26.0517 50 -0.53 45
IV.MNTT.EHZ. 2021-03-15T20:31:41.10 0.1 negative manual P 49 44.4222 50 0.46 88
IV.T1299.HNN. 2021-03-15T20:31:40.44 0.6 undecidable manual S 156 20.2686 118 0.21 48
IV.FEMA.HNE. 2021-03-15T20:31:40.08 0.6 undecidable manual S 329 20.868 117 -0.33 47
IV.SMA1.EHZ. 2021-03-15T20:31:40.74 0.3 undecidable manual S 146 22.6551 50 -0.2 73
IV.SAP2.EHZ. 2021-03-15T20:31:39.64 0.1 undecidable manual P 28 37.3293 50 0.1 96
IV.MML1.HNE. 2021-03-15T20:31:39.56 0.1 undecidable manual P 334 38.628 50 -0.18 94
IV.MTRA.EHZ. 2021-03-15T20:31:39.22 0.3 undecidable manual S 105 18.2706 120 -0.39 70
IV.TERO.HHZ. 2021-03-15T20:31:39.55 0.1 undecidable manual P 120 39.7269 50 -0.37 91
IV.GUMA.HHZ. 2021-03-15T20:31:38.66 0.1 negative manual P 23 31.6461 50 -0.01 99
IV.MMO1.EHZ. 2021-03-15T20:31:38.74 0.3 undecidable manual S 47 16.1727 123 -0.25 73
IV.CSP1.EHZ. 2021-03-15T20:31:38.48 0.1 positive manual P 3 32.3454 50 -0.3 93
IV.RM33.EHZ. 2021-03-15T20:31:38.81 0.3 undecidable manual P 175 32.4453 50 0.01 74
IV.MF5.EHZ. 2021-03-15T20:31:38.52 0.1 undecidable manual P 47 30.747 50 0 99
IV.CAMP.HHZ. 2021-03-15T20:31:38.83 0.3 undecidable manual P 148 34.743 50 -0.32 69
IV.CESI.HHZ. 2021-03-15T20:31:38.54 0.1 undecidable manual P 315 31.8459 50 -0.17 96
IV.MC2.EHZ. 2021-03-15T20:31:38.12 0.6 undecidable manual S 3 12.2766 131 0.19 49
IV.SMA1.EHZ. 2021-03-15T20:31:37.14 0.1 negative manual P 146 22.6551 50 -0.15 98
IV.GAVE.EHZ. 2021-03-15T20:31:37.86 0.1 negative manual P 243 26.2515 50 0.02 100
IT.MTCL.HGZ. 2021-03-15T20:31:37.49 0.1 undecidable manual P 326 26.0517 50 -0.31 94
IV.LNSS.HHZ. 2021-03-15T20:31:37.64 0.1 negative manual P 208 24.753 50 0.03 100
IV.FDMO.HHZ. 2021-03-15T20:31:37.63 0.1 undecidable manual P 344 27.2505 50 -0.36 93
IV.MMO1.EHZ. 2021-03-15T20:31:36.07 0.1 undecidable manual P 47 16.1727 123 -0.1 100
IV.T1299.HNN. 2021-03-15T20:31:36.99 0.1 undecidable manual P 156 20.2686 118 0.12 99
IV.NRCA.HNZ. 2021-03-15T20:31:36.84 0.3 undecidable manual S 304 6.4935 148 0.23 74
IV.MTRA.EHZ. 2021-03-15T20:31:36.36 0.1 negative manual P 105 18.2706 120 -0.16 98
IV.FEMA.HNE. 2021-03-15T20:31:36.95 0.3 undecidable manual P 329 20.868 117 -0.03 75
IV.NRCA.HNZ. 2021-03-15T20:31:35.06 0.1 positive manual P 304 6.4935 148 0.27 98
IV.MC2.EHZ. 2021-03-15T20:31:35.70 0.1 undecidable manual P 3 12.2766 131 0.15 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHN. ML:2.6 0.006488475 0.1408 AML other m 2021-03-15T20:31:36.95
IV.NRCA.HNN. ML:2.5 0.005271556 0.128 AML other m 2021-03-15T20:31:36.95
IV.NRCA.HNE. ML:3.0 0.013916565 0.1408 AML other m 2021-03-15T20:31:36.96
IV.NRCA.HHE. ML:3.0 0.014218454999999998 0.1664 AML other m 2021-03-15T20:31:36.97
IV.MTRA.HNN. ML:2.1 0.0010700030000000001 0.1536 AML other m 2021-03-15T20:31:39.68
IV.MTRA.EHN. ML:2.1 0.0010658691 0.1664 AML other m 2021-03-15T20:31:39.69
IV.MTRA.HNE. ML:2.2 0.0014068445000000001 1.872 AML other m 2021-03-15T20:31:39.00
IV.MTRA.EHE. ML:2.2 0.0013900000000000002 1.88 AML other m 2021-03-15T20:31:39.94
IV.SMA1.EHN. ML:1.9 0.000522 0.14 AML other m 2021-03-15T20:31:40.83
IV.SMA1.EHE. ML:1.9 0.00051190445 0.2048 AML other m 2021-03-15T20:31:41.57
IV.LNSS.HNE. ML:2.0 0.0006644372 1.8592 AML other m 2021-03-15T20:31:41.99
IV.LNSS.HHE. ML:2.0 0.0006674158 1.8592 AML other m 2021-03-15T20:31:41.99
IV.LNSS.HNN. ML:2.1 0.0007269516000000001 0.192 AML other m 2021-03-15T20:31:42.01
IV.LNSS.HHN. ML:2.1 0.0007930000000000001 0.18 AML other m 2021-03-15T20:31:42.01
IV.MOMA.HHN. ML:1.5 0.0000894 1.36 AML other m 2021-03-15T20:31:42.31
IV.GAVE.EHE. ML:2.2 0.000892 0.34 AML other m 2021-03-15T20:31:42.50
IV.GAVE.HNE. ML:2.2 0.00080296855 0.3328 AML other m 2021-03-15T20:31:42.50
IV.FDMO.HHN. ML:1.6 0.00023865995 0.2048 AML other m 2021-03-15T20:31:42.49
IV.GAVE.HNN. ML:1.6 0.00023741204 0.2304 AML other m 2021-03-15T20:31:42.62
IV.FDMO.HHE. ML:1.7 0.000246 0.16 AML other m 2021-03-15T20:31:42.85
IV.GAVE.EHN. ML:2.1 0.000701191 0.2048 AML other m 2021-03-15T20:31:43.10
IV.CESI.HHE. ML:1.6 0.0002014682 0.1152 AML other m 2021-03-15T20:31:43.67
IV.CESI.HHN. ML:2.0 0.0005380000000000001 0.3 AML other m 2021-03-15T20:31:43.81
IV.CESI.HNN. ML:2.1 0.0005898215 0.2944 AML other m 2021-03-15T20:31:43.96
IV.GUMA.HHE. ML:2.5 0.0013900000000000002 1.78 AML other m 2021-03-15T20:31:44.89
IV.CAMP.HHE. ML:1.8 0.0002455 0.32 AML other m 2021-03-15T20:31:44.23
IV.CAMP.HHN. ML:1.7 0.00021799999999999999 0.18 AML other m 2021-03-15T20:31:44.25
IV.GUMA.HHN. ML:2.4 0.00101194205 0.4992 AML other m 2021-03-15T20:31:44.08
IV.CESI.HNE. ML:1.6 0.00018539375 0.256 AML other m 2021-03-15T20:31:44.44
IV.CSP1.EHE. ML:2.0 0.00042499814999999994 0.3584 AML other m 2021-03-15T20:31:44.52
IV.RM33.HNN. ML:1.6 0.00017811860000000002 0.1536 AML other m 2021-03-15T20:31:44.77
IV.RM33.EHN. ML:1.6 0.00016190695 0.1536 AML other m 2021-03-15T20:31:44.77
IV.CSP1.EHN. ML:1.9 0.00038738039999999997 0.2816 AML other m 2021-03-15T20:31:45.41
IV.TERO.HNN. ML:1.9 0.00029746105 0.0768 AML other m 2021-03-15T20:31:45.61
IV.TERO.HHN. ML:2.0 0.000308972 0.0768 AML other m 2021-03-15T20:31:45.61
IV.TERO.HHE. ML:1.9 0.0002647397 0.1024 AML other m 2021-03-15T20:31:45.82
IV.TERO.HNE. ML:1.9 0.00027480369999999997 0.1536 AML other m 2021-03-15T20:31:45.83
IV.RM33.EHE. ML:1.5 0.00012739349999999999 0.1152 AML other m 2021-03-15T20:31:45.98
IV.RM33.HNE. ML:1.5 0.00013733335 1.744 AML other m 2021-03-15T20:31:46.98
IV.MF5.EHN. ML:1.8 0.000308 0.34 AML other m 2021-03-15T20:31:46.44
IV.SAP2.EHE. ML:1.8 0.00024540605 0.32 AML other m 2021-03-15T20:31:47.55
IV.SAP2.EHN. ML:2.6 0.00146 0.2 AML other m 2021-03-15T20:31:48.10
IV.MF5.EHE. ML:1.7 0.0002212459 0.3328 AML other m 2021-03-15T20:31:48.49
IV.MNTT.EHN. ML:2.3 0.0005512106 0.3584 AML other m 2021-03-15T20:31:48.83
IV.OFFI.HHN. ML:1.6 0.00011109820000000001 0.2304 AML other m 2021-03-15T20:31:49.41
IV.MOMA.HHE. ML:2.0 0.0002395 0.2 AML other m 2021-03-15T20:31:50.36
IV.MOMA.HNE. ML:1.9 0.00023242580000000003 0.2048 AML other m 2021-03-15T20:31:50.36
IV.MNTT.EHE. ML:2.6 0.001366954 0.1536 AML other m 2021-03-15T20:31:50.78
IV.FIAM.HHN. ML:1.1 0.000024417085000000003 0.1792 AML other m 2021-03-15T20:31:52.10
IV.ATCC.EHE. ML:1.6 0.00008063363000000002 1.616 AML other m 2021-03-15T20:31:52.13
IV.FIAM.HHE. ML:1.0 0.0000182976 1.5776 AML other m 2021-03-15T20:31:53.79
IV.ATCC.EHN. ML:1.6 0.00007811173 0.2176 AML other m 2021-03-15T20:31:53.80
IV.EL6.EHE. ML:1.6 0.000074290385 1.8336 AML other m 2021-03-15T20:31:53.07
IV.EL6.EHN. ML:1.8 0.000120079775 0.2432 AML other m 2021-03-15T20:31:55.70
IV.VCEL.EHN. ML:1.7 0.000075588589 1.7568 AML other m 2021-03-15T20:31:56.99
IV.CESX.HHN. ML:1.7 0.0001115 0.22 AML other m 2021-03-15T20:31:56.42
IV.CESX.HHE. ML:1.5 0.0000802 0.26 AML other m 2021-03-15T20:31:56.27
IV.ARVD.HHE. ML:1.3 0.000024244599 0.2432 AML other m 2021-03-15T20:31:58.33
IV.FAGN.HHE. ML:1.7 0.00008586441999999999 0.3584 AML other m 2021-03-15T20:31:59.21
IV.MURB.HHN. ML:1.9 0.000124 0.28 AML other m 2021-03-15T20:31:59.39
IV.MURB.HNN. ML:2.0 0.00015354635 0.2688 AML other m 2021-03-15T20:31:59.40
IV.T0110.HHN. ML:1.7 0.000073028355 0.3584 AML other m 2021-03-15T20:31:59.39
IV.FRON.EHN. ML:1.5 0.000033688370000000006 1.6544 AML other m 2021-03-15T20:32:00.05
IV.MURB.HHE. ML:1.9 0.00012831690000000002 0.3712 AML other m 2021-03-15T20:32:00.49
IV.VCEL.EHE. ML:1.8 0.00009456350999999999 0.5376 AML other m 2021-03-15T20:32:01.38
IV.MURB.HNE. ML:2.0 0.00016274515 0.2944 AML other m 2021-03-15T20:32:01.32
IV.MGAB.HHN. ML:1.6 0.000050634755 0.4736 AML other m 2021-03-15T20:32:03.17
IV.SSFR.HHE. ML:1.6 0.00005913045 0.2432 AML other m 2021-03-15T20:32:03.94
IV.SSFR.HHN. ML:1.8 0.00008355 0.22 AML other m 2021-03-15T20:32:04.55
IV.MGAB.HHE. ML:1.6 0.00004411520500000001 0.3584 AML other m 2021-03-15T20:32:04.93
IV.ARVD.HHN. ML:1.2 0.000021519955 0.2304 AML other m 2021-03-15T20:32:07.37
IV.FAGN.HHN. ML:1.6 0.00007206678 1.6032 AML other m 2021-03-15T20:32:07.88
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