Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.1 on date 12-04-2021 and time 20:01:23 (Italy) in region 6 km NE Norcia (PG)

A magnitude ML 2.1 earthquake occured in region: 6 km NE Norcia (PG), on

  • 12-04-2021 18:01:23 (UTC)
  • 12-04-2021 20:01:23 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.8390, 13.1330 at 10 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 6 4957 4957
Castelsantangelo sul Nera MC 7 281 5238
Preci PG 9 724 5962
Visso MC 11 1107 7069
Ussita MC 12 444 7513
Arquata del Tronto AP 15 1178 8691
Cascia PG 16 3217 11908
Montegallo AP 16 523 12431
Montemonaco AP 17 604 13035
Sellano PG 18 1079 14114
Cerreto di Spoleto PG 18 1075 15189
Accumoli RI 19 667 15856
Bolognola MC 19 142 15998

Municipalities with at least 50000 inhabitants

An earthquake occurred to
37 Km E of Foligno (57155 inhabitants)
50 Km NE of Terni (111501 inhabitants)
51 Km W of Teramo (54892 inhabitants)
58 Km NW of L'Aquila (69753 inhabitants)
68 Km E of Perugia (166134 inhabitants)
91 Km W of Montesilvano (53738 inhabitants)
92 Km SW of Ancona (100861 inhabitants)
96 Km E of Viterbo (67173 inhabitants)
98 Km W of Pescara (121014 inhabitants)
99 Km NE of Guidonia Montecelio (88673 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 2.1 2021-04-12
18:01:23		 42.8388 13.1327 10 2021-07-12
16:55:08		 Bollettino Sismico Italiano INGV 89395191
Reviewed
Rev100 		ML 2.1 2021-04-12
18:01:23		 42.8375 13.1362 9 2021-04-12
18:09:00		 Sala Sismica INGV-Roma 89040381
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-04-12 18:01:23 ± 0.06
Latitude 42.8388 ± 0.0036
Longitude 13.1327 ± 0.0049
Depth (km) 10 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 89395191

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 369
Semi-minor axis of confidence ellipse (meter) 250
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 49
Circular confidence region, given by single value of horizontal uncertainty (meter) 370.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 37
Number of associated phases, regardless of their use for origin computation 53
Number of defining phases 51
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.28
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.64931
Number of stations at which the event was observed 28
Number of stations from which data was used for origin computation 26
Magnitudes information

ML:2.1

Field Value
Value 2.1
Uncertainty 0.2
Num. used stations 60
Type of magnitude ML
Reference to an origin 89395191
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-04-29 15:17:41

ML:2.1

Field Value
Value 2.1
Uncertainty 0.2
Num. used stations 68
Type of magnitude ML
Reference to an origin 89040381
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-04-12 18:09:00
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.FIR.HHZ. 2021-04-12T18:02:18.90 3.0 undecidable manual Sg 5.14 0
IV.MELA.HHZ. 2021-04-12T18:01:54.96 3.0 positive manual Pn 0.24 0
IV.SSFR.HHZ. 2021-04-12T18:01:46.10 0.6 undecidable manual S 337 72.0723 50 0.4 42
IV.MURB.HHZ. 2021-04-12T18:01:45.70 0.6 undecidable manual S 314 68.1762 50 1.05 33
IV.EL6.EHZ. 2021-04-12T18:01:41.50 0.6 undecidable manual S 357 54.501 50 0.5 42
IV.ATCC.EHZ. 2021-04-12T18:01:41.60 0.6 undecidable manual S 314 55.4001 50 0.34 44
IV.OFFI.HHZ. 2021-04-12T18:01:41.28 0.6 undecidable manual S 76 46.2204 50 2.48 11
IV.CESX.HHZ. 2021-04-12T18:01:40.50 1.0 undecidable manual S 240 51.3153 50 0.34 22
IV.MOMA.HHZ. 2021-04-12T18:01:39.19 0.6 undecidable manual S 265 45.9207 50 0.47 43
IV.ASSB.HHZ. 2021-04-12T18:01:38.20 0.6 undecidable manual S 301 44.622 50 -0.18 46
IV.TERO.HHZ. 2021-04-12T18:01:38.40 0.6 undecidable manual S 122 45.3213 50 -0.15 46
IV.CAMP.HHZ. 2021-04-12T18:01:37.10 0.6 undecidable manual S 146 40.5261 50 -0.17 46
IV.ARRO.EHZ. 2021-04-12T18:01:37.60 0.6 undecidable manual S 226 41.5251 50 0.05 47
IV.SAP2.EHZ. 2021-04-12T18:01:36.40 0.6 undecidable manual S 37 35.8419 50 0.36 45
IV.SSFR.HHZ. 2021-04-12T18:01:36.51 0.6 undecidable manual P 337 72.0723 50 0.09 45
IV.RM33.EHZ. 2021-04-12T18:01:36.50 0.6 undecidable manual S 170 37.2294 50 0.1 47
IV.MURB.HHZ. 2021-04-12T18:01:35.99 0.3 undecidable manual P 314 68.1762 50 0.17 66
IV.MF5.EHZ. 2021-04-12T18:01:35.20 0.6 undecidable manual S 58 31.2465 50 0.38 45
IV.LNSS.HHZ. 2021-04-12T18:01:34.00 0.6 undecidable manual S 196 27.2505 50 0.26 47
IV.CSP1.EHZ. 2021-04-12T18:01:33.50 0.6 undecidable manual S 12 28.6491 50 -0.62 42
IV.CESX.HHZ. 2021-04-12T18:01:33.43 0.3 undecidable manual P 240 51.3153 50 0.2 68
IV.OFFI.HHZ. 2021-04-12T18:01:33.13 0.3 undecidable manual P 76 46.2204 50 0.69 60
IV.CESI.HNZ. 2021-04-12T18:01:33.00 0.6 undecidable manual S 315 26.1516 50 -0.44 45
IV.EL6.EHZ. 2021-04-12T18:01:33.31 0.3 undecidable manual P 357 54.501 50 -0.4 65
IV.SMA1.EHZ. 2021-04-12T18:01:33.80 0.6 undecidable manual S 144 28.4493 50 -0.25 47
IV.ATCC.EHZ. 2021-04-12T18:01:33.58 0.1 undecidable manual P 314 55.4001 50 -0.28 88
IV.GAVE.EHZ. 2021-04-12T18:01:33.18 0.6 undecidable manual S 230 25.3524 111 -0.02 49
IV.MOMA.HHZ. 2021-04-12T18:01:32.22 0.3 undecidable manual P 265 45.9207 50 -0.18 69
IV.MNTT.EHZ. 2021-04-12T18:01:32.87 0.6 undecidable manual P 56 45.0216 50 0.62 41
IV.MTRA.EHZ. 2021-04-12T18:01:32.30 0.6 undecidable manual S 113 23.3544 113 -0.26 47
IV.ASSB.HHZ. 2021-04-12T18:01:31.86 0.1 negative manual P 301 44.622 50 -0.34 89
IV.FDMO.HHZ. 2021-04-12T18:01:31.80 0.6 undecidable manual S 350 22.2555 114 -0.4 46
IV.TERO.HHZ. 2021-04-12T18:01:31.96 0.3 undecidable manual P 122 45.3213 50 -0.34 67
IV.ARRO.EHZ. 2021-04-12T18:01:31.73 0.6 undecidable manual P 226 41.5251 50 0.01 48
IT.MTCL.HGZ. 2021-04-12T18:01:31.20 0.3 undecidable manual S 328 20.2686 116 -0.4 69
IV.CAMP.HHZ. 2021-04-12T18:01:31.27 0.6 undecidable manual P 146 40.5261 50 -0.29 45
IV.RM33.EHZ. 2021-04-12T18:01:30.76 0.3 undecidable manual P 170 37.2294 50 -0.29 68
IV.MF5.EHZ. 2021-04-12T18:01:30.25 0.1 undecidable manual P 58 31.2465 50 0.11 96
IV.MMO1.EHZ. 2021-04-12T18:01:30.52 0.6 undecidable manual S 67 17.1717 120 -0.11 49
IV.SAP2.EHZ. 2021-04-12T18:01:30.93 0.1 undecidable manual P 37 35.8419 50 0.09 95
IV.FEMA.HNZ. 2021-04-12T18:01:30.20 0.3 undecidable manual S 334 15.2736 123 0.13 73
IV.LNSS.HHZ. 2021-04-12T18:01:29.45 0.1 positive manual P 196 27.2505 50 -0.07 97
IV.CESI.HNZ. 2021-04-12T18:01:29.11 0.1 undecidable manual P 315 26.1516 50 -0.23 94
IV.CSP1.EHZ. 2021-04-12T18:01:29.37 0.1 positive manual P 12 28.6491 50 -0.37 91
IV.SMA1.EHZ. 2021-04-12T18:01:29.51 0.1 undecidable manual P 144 28.4493 50 -0.19 95
IV.GAVE.EHZ. 2021-04-12T18:01:29.24 0.3 undecidable manual P 230 25.3524 111 0.03 74
IV.MTRA.EHZ. 2021-04-12T18:01:28.68 0.1 negative manual P 113 23.3544 113 -0.16 96
IV.FDMO.HHZ. 2021-04-12T18:01:28.40 0.1 positive manual P 350 22.2555 114 -0.23 95
IT.MTCL.HGZ. 2021-04-12T18:01:28.14 0.1 undecidable manual P 328 20.2686 116 -0.14 97
IV.FEMA.HNZ. 2021-04-12T18:01:27.58 0.1 undecidable manual P 334 15.2736 123 0.18 97
IV.MMO1.EHZ. 2021-04-12T18:01:27.73 0.1 undecidable manual P 67 17.1717 120 0 100
IV.NRCA.HNZ. 2021-04-12T18:01:27.98 0.6 undecidable manual S 248 1.5984 171 0.73 42
IV.NRCA.HNZ. 2021-04-12T18:01:26.34 0.1 undecidable manual P 248 1.5984 171 0.57 90
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HNN. ML:2.6 0.007375 0.12 AML other m 2021-04-12T18:01:28.09
IV.NRCA.HHN. ML:2.6 0.008245 0.12 AML other m 2021-04-12T18:01:28.09
IV.NRCA.HNE. ML:2.4 0.005035 0.68 AML other m 2021-04-12T18:01:28.10
IV.NRCA.HHE. ML:2.4 0.00522 0.08 AML other m 2021-04-12T18:01:28.44
IV.FEMA.HNE. ML:2.6 0.0035800000000000003 0.2 AML other m 2021-04-12T18:01:30.55
IV.FEMA.HNN. ML:2.2 0.001665 0.86 AML other m 2021-04-12T18:01:31.56
IV.FDMO.HHN. ML:2.2 0.001075 1.72 AML other m 2021-04-12T18:01:32.09
IV.FDMO.HHE. ML:2.2 0.000949 0.2 AML other m 2021-04-12T18:01:32.11
IV.MTRA.HNN. ML:1.9 0.0005245 1.54 AML other m 2021-04-12T18:01:32.87
IV.CESI.HHN. ML:2.4 0.00125 0.46 AML other m 2021-04-12T18:01:33.40
IV.CESI.HHE. ML:2.1 0.0007325 0.86 AML other m 2021-04-12T18:01:33.64
IV.GAVE.HNN. ML:2.2 0.0009065 0.2 AML other m 2021-04-12T18:01:33.83
IV.GAVE.EHN. ML:2.7 0.00276 0.2 AML other m 2021-04-12T18:01:33.83
IV.CSP1.EHN. ML:2.3 0.000992 0.34 AML other m 2021-04-12T18:01:34.08
IV.MTRA.HNE. ML:2.1 0.0008165 0.14 AML other m 2021-04-12T18:01:34.20
IV.MTRA.EHE. ML:2.1 0.0008025 0.16 AML other m 2021-04-12T18:01:34.20
IV.LNSS.HHE. ML:2.0 0.0005355 0.12 AML other m 2021-04-12T18:01:34.39
IV.GAVE.HNE. ML:2.6 0.002275 0.9 AML other m 2021-04-12T18:01:34.79
IV.GAVE.EHE. ML:2.6 0.00244 0.9 AML other m 2021-04-12T18:01:34.80
IV.SMA1.EHE. ML:2.0 0.0005505 0.22 AML other m 2021-04-12T18:01:34.48
IV.MTRA.EHN. ML:1.9 0.000502 0.46 AML other m 2021-04-12T18:01:34.53
IV.SMA1.EHN. ML:2.1 0.0006445000000000001 0.12 AML other m 2021-04-12T18:01:34.74
IV.CSP1.EHE. ML:2.2 0.0007585 1.14 AML other m 2021-04-12T18:01:34.80
IV.MF5.EHN. ML:2.0 0.0005024999999999999 0.98 AML other m 2021-04-12T18:01:35.62
IV.MF5.EHE. ML:1.9 0.00033 0.38 AML other m 2021-04-12T18:01:35.68
IV.LNSS.HHN. ML:2.0 0.000585 0.12 AML other m 2021-04-12T18:01:35.68
IV.SAP2.EHN. ML:3.0 0.004144999999999999 0.14 AML other m 2021-04-12T18:01:36.81
IV.SAP2.EHE. ML:2.2 0.0006105 1.5 AML other m 2021-04-12T18:01:37.83
IV.RM33.HNE. ML:1.9 0.0003005 1 AML other m 2021-04-12T18:01:37.34
IV.CAMP.HHE. ML:2.2 0.000484 0.2 AML other m 2021-04-12T18:01:37.48
IV.CAMP.HHN. ML:1.8 0.0002375 0.22 AML other m 2021-04-12T18:01:37.41
IV.RM33.EHN. ML:1.8 0.000265 0.74 AML other m 2021-04-12T18:01:37.62
IV.RM33.HNN. ML:1.9 0.00032450000000000003 0.74 AML other m 2021-04-12T18:01:37.99
IV.RM33.EHE. ML:1.8 0.000259 0.64 AML other m 2021-04-12T18:01:37.63
IV.ARRO.EHE. ML:2.0 0.0003155 0.26 AML other m 2021-04-12T18:01:37.95
IV.ASSB.HHE. ML:2.1 0.000409 0.64 AML other m 2021-04-12T18:01:38.53
IV.ASSB.HHN. ML:2.1 0.0003445 0.2 AML other m 2021-04-12T18:01:38.57
IV.TERO.HHN. ML:2.2 0.00046750000000000003 0.32 AML other m 2021-04-12T18:01:38.83
IV.ARRO.EHN. ML:2.0 0.00029549999999999997 0.64 AML other m 2021-04-12T18:01:39.13
IV.TERO.HHE. ML:2.0 0.0002725 0.34 AML other m 2021-04-12T18:01:39.57
IV.MOMA.HNE. ML:2.1 0.000338 0.24 AML other m 2021-04-12T18:01:40.14
IV.MOMA.HHE. ML:2.0 0.000313 0.24 AML other m 2021-04-12T18:01:40.02
IV.MOMA.HHN. ML:2.0 0.000282 0.16 AML other m 2021-04-12T18:01:40.22
IV.MOMA.HNN. ML:2.0 0.0002685 0.7 AML other m 2021-04-12T18:01:40.22
IV.MNTT.EHE. ML:2.6 0.00126 1.46 AML other m 2021-04-12T18:01:41.06
IV.MNTT.EHN. ML:2.3 0.0006670000000000001 0.2 AML other m 2021-04-12T18:01:41.44
IV.CESX.HHN. ML:2.1 0.000288 0.46 AML other m 2021-04-12T18:01:41.85
IV.OFFI.HHN. ML:2.4 0.00076 1.44 AML other m 2021-04-12T18:01:41.16
IV.CESX.HHE. ML:1.9 0.00021450000000000004 0.44 AML other m 2021-04-12T18:01:42.41
IV.EL6.EHE. ML:1.9 0.0001835 0.44 AML other m 2021-04-12T18:01:42.76
IV.ATCC.EHE. ML:2.0 0.00020800000000000001 0.16 AML other m 2021-04-12T18:01:42.73
IV.ATCC.EHN. ML:2.1 0.00027249999999999996 0.3 AML other m 2021-04-12T18:01:42.89
IV.OFFI.HHE. ML:2.1 0.00036199999999999996 1.02 AML other m 2021-04-12T18:01:43.03
IV.EL6.EHN. ML:1.9 0.000204 1.2 AML other m 2021-04-12T18:01:43.67
IV.MURB.HHE. ML:2.3 0.00032 1.44 AML other m 2021-04-12T18:01:46.00
IV.MURB.HHN. ML:2.2 0.00029949999999999996 0.52 AML other m 2021-04-12T18:01:47.32
IV.SSFR.HNE. ML:2.2 0.00026549999999999995 0.86 AML other m 2021-04-12T18:01:48.87
IV.SSFR.HNN. ML:2.2 0.000277 0.66 AML other m 2021-04-12T18:01:48.84
IV.SSFR.HHN. ML:2.1 0.00019250000000000002 0.16 AML other m 2021-04-12T18:01:48.84
IV.SSFR.HHE. ML:2.2 0.000242 0.18 AML other m 2021-04-12T18:01:48.86
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
Waveforms Seismic signals in miniseed + resp format Download