Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.7 on date 14-04-2021 and time 05:21:13 (Italy) in region 8 km E Norcia (PG)

A magnitude ML 1.7 earthquake occured in region: 8 km E Norcia (PG), on

  • 14-04-2021 03:21:13 (UTC)
  • 14-04-2021 05:21:13 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.7710, 13.1840 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 8 4957 4957
Arquata del Tronto AP 9 1178 6135
Accumoli RI 10 667 6802
Castelsantangelo sul Nera MC 14 281 7083
Montegallo AP 15 523 7606
Cascia PG 15 3217 10823
Preci PG 17 724 11547
Cittareale RI 17 482 12029
Amatrice RI 18 2657 14686
Acquasanta Terme AP 19 2916 17602
Montemonaco AP 19 604 18206
Visso MC 19 1107 19313
Ussita MC 20 444 19757

Municipalities with at least 50000 inhabitants

An earthquake occurred to
44 Km E of Foligno (57155 inhabitants)
44 Km W of Teramo (54892 inhabitants)
50 Km E of Terni (111501 inhabitants)
50 Km NW of L'Aquila (69753 inhabitants)
75 Km SE of Perugia (166134 inhabitants)
84 Km W of Montesilvano (53738 inhabitants)
91 Km W of Pescara (121014 inhabitants)
93 Km NW of Chieti (51815 inhabitants)
94 Km NE of Guidonia Montecelio (88673 inhabitants)
95 Km NE of Tivoli (56533 inhabitants)
97 Km E of Viterbo (67173 inhabitants)
98 Km S of Ancona (100861 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 2021-04-14
03:21:13		 42.7712 13.1838 10 2021-07-12
16:55:08		 Bollettino Sismico Italiano INGV 89487781
Reviewed
Rev100 		ML 1.7 2021-04-14
03:21:13		 42.77 13.1853 10 2021-04-14
03:40:07		 Sala Sismica INGV-Roma 89082601
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-04-14 03:21:13 ± 0.05
Latitude 42.7712 ± 0.0027
Longitude 13.1838 ± 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 89487781

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 400
Semi-minor axis of confidence ellipse (meter) 164
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 65
Circular confidence region, given by single value of horizontal uncertainty (meter) 400.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 66
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) 0.08094
Epicentral distance of station farthest from the epicenter (degree) 0.89842
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:1.7

Field Value
Value 1.7
Uncertainty 0.3
Num. used stations 29
Type of magnitude ML
Reference to an origin 89487781
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-04-26 08:28:54

ML:1.7

Field Value
Value 1.7
Uncertainty 0.3
Num. used stations 37
Type of magnitude ML
Reference to an origin 89082601
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-04-14 03:40:07
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CING.HNZ. 2021-04-14T03:21:35.18 0.6 undecidable manual S 1 67.0773 50 0.92 35
IV.ATCC.EHZ. 2021-04-14T03:21:34.17 0.6 undecidable manual S 316 63.6918 50 0.81 37
IV.EL6.EHZ. 2021-04-14T03:21:33.61 0.6 undecidable manual S 354 62.2932 50 0.63 40
IV.CESX.HHZ. 2021-04-14T03:21:30.53 0.6 undecidable manual S 250 51.9036 50 0.31 44
IV.PIEI.HHZ. 2021-04-14T03:21:30.90 0.6 undecidable manual P 328 99.7224 50 0.35 40
IV.ATPI.EHE. 2021-04-14T03:21:30.48 0.6 undecidable manual P 320 98.4237 50 0.13 42
IV.TB01.DHZ.01 2021-04-14T03:21:29.32 0.6 undecidable manual P 318 90.8424 50 0.14 43
IV.FRON.EHZ. 2021-04-14T03:21:29.13 0.3 undecidable manual P 336 90.7425 50 -0.03 65
IV.ARVD.HHZ. 2021-04-14T03:21:27.93 0.6 undecidable manual P 346 82.9503 50 -0.04 44
IV.SAP2.EHE. 2021-04-14T03:21:27.86 0.6 undecidable manual S 26 40.1265 50 0.79 39
IV.SSFR.HHZ. 2021-04-14T03:21:27.61 0.6 undecidable manual P 336 80.6637 50 0 45
IV.MML1.EHN. 2021-04-14T03:21:27.38 0.6 undecidable manual S 336 41.7249 50 -0.11 47
IV.MURB.HHE. 2021-04-14T03:21:27.19 0.6 undecidable manual P 316 76.368 50 0.24 43
IV.TERO.HHZ. 2021-04-14T03:21:26.12 0.6 undecidable manual S 116 38.0286 50 -0.39 45
IV.PF6.EHE. 2021-04-14T03:21:26.97 0.6 undecidable manual S 1 40.7259 50 -0.25 46
IV.MF5.EHZ. 2021-04-14T03:21:25.57 0.6 undecidable manual S 43 32.8449 50 0.43 45
IV.CING.HNZ. 2021-04-14T03:21:25.65 0.6 undecidable manual P 1 67.0773 50 0.14 45
IV.CESI.HHZ. 2021-04-14T03:21:25.37 0.3 undecidable manual S 319 34.4433 50 -0.19 70
IV.FAGN.HHZ. 2021-04-14T03:21:25.36 0.6 undecidable manual P 150 64.8906 50 0.18 44
IV.CSP1.EHZ. 2021-04-14T03:21:25.67 0.6 undecidable manual S 3 35.6421 50 -0.2 47
IV.VCEL.EHN. 2021-04-14T03:21:25.74 0.6 undecidable manual P 128 67.9764 50 0.08 45
IV.EL6.EHZ. 2021-04-14T03:21:24.67 0.3 undecidable manual P 354 62.2932 50 -0.11 68
IV.CAMP.HHN. 2021-04-14T03:21:24.61 0.6 undecidable manual S 145 31.9458 50 -0.27 46
IV.RM33.EHZ. 2021-04-14T03:21:24.09 0.6 undecidable manual S 175 29.1486 50 -0.06 48
IV.ATCC.EHZ. 2021-04-14T03:21:24.98 0.6 undecidable manual P 316 63.6918 50 -0.01 46
IV.FDMO.HHZ. 2021-04-14T03:21:24.10 0.6 undecidable manual S 345 30.4473 50 -0.39 45
IT.MTCL.HGZ. 2021-04-14T03:21:23.54 0.6 undecidable manual S 329 28.8489 50 -0.54 44
IV.CESX.HHZ. 2021-04-14T03:21:23.25 0.6 undecidable manual P 250 51.9036 50 0.07 46
IV.MNTT.EHZ. 2021-04-14T03:21:23.10 0.6 undecidable manual P 46 46.5201 50 0.76 39
IV.OFFI.HHZ. 2021-04-14T03:21:23.04 0.6 undecidable manual P 66 44.7219 50 0.97 35
IV.FEMA.HNZ. 2021-04-14T03:21:22.19 0.6 undecidable manual S 333 23.8539 112 -0.28 47
MN.AQU.HHZ. 2021-04-14T03:21:22.64 0.6 undecidable manual P 159 49.7169 50 -0.2 45
IV.LNSS.HHZ. 2021-04-14T03:21:22.04 0.3 undecidable manual S 212 22.0668 113 0.14 72
IV.PF6.EHE. 2021-04-14T03:21:21.15 0.6 undecidable manual P 1 40.7259 50 -0.3 45
IV.MML1.EHN. 2021-04-14T03:21:21.38 0.1 positive manual P 336 41.7249 50 -0.23 92
IV.SMA1.EHZ. 2021-04-14T03:21:21.34 0.6 undecidable manual S 142 19.869 116 0.12 49
IV.GIGS.HHZ. 2021-04-14T03:21:21.99 0.6 undecidable manual P 138 47.5191 50 -0.5 43
IV.SAP2.EHE. 2021-04-14T03:21:21.73 0.6 undecidable manual P 26 40.1265 50 0.37 45
IV.MMO1.EHZ. 2021-04-14T03:21:20.53 0.6 undecidable manual S 39 18.3705 117 -0.22 48
IV.CESI.HHZ. 2021-04-14T03:21:20.34 0.1 positive manual P 319 34.4433 50 -0.15 94
IV.T1299.EHZ. 2021-04-14T03:21:20.61 0.6 undecidable manual S 152 17.1717 119 0.22 48
IV.CSP1.EHZ. 2021-04-14T03:21:20.41 0.3 undecidable manual P 3 35.6421 50 -0.26 69
IV.MF5.EHZ. 2021-04-14T03:21:20.48 0.6 undecidable manual P 43 32.8449 50 0.23 46
IV.MTRA.HNZ. 2021-04-14T03:21:20.23 0.3 undecidable manual S 95 17.3715 119 -0.22 72
IV.TERO.HHZ. 2021-04-14T03:21:20.59 0.3 undecidable manual P 116 38.0286 50 -0.45 66
IV.FDMO.HHZ. 2021-04-14T03:21:19.56 0.3 undecidable manual P 345 30.4473 50 -0.31 69
IV.CAMP.HHN. 2021-04-14T03:21:19.81 0.1 positive manual P 145 31.9458 50 -0.29 92
IT.MTCL.HGZ. 2021-04-14T03:21:19.30 0.6 undecidable manual P 329 28.8489 50 -0.33 46
IV.RM33.EHZ. 2021-04-14T03:21:19.52 0.3 undecidable manual P 175 29.1486 50 -0.16 71
IV.LNSS.HHZ. 2021-04-14T03:21:18.62 0.3 undecidable manual P 212 22.0668 113 0.25 71
IV.FEMA.HNZ. 2021-04-14T03:21:18.63 0.6 undecidable manual P 333 23.8539 112 -0.08 49
IV.SMA1.EHZ. 2021-04-14T03:21:18.02 0.1 positive manual P 142 19.869 116 0.03 99
IV.MTRA.HNZ. 2021-04-14T03:21:17.53 0.1 positive manual P 95 17.3715 119 -0.01 100
IV.MMO1.EHZ. 2021-04-14T03:21:17.66 0.3 undecidable manual P 39 18.3705 117 -0.05 74
IV.NRCA.HNZ. 2021-04-14T03:21:17.86 0.3 undecidable manual S 321 8.9799 137 -0.24 73
IV.T1299.EHZ. 2021-04-14T03:21:17.85 0.1 positive manual P 152 17.1717 119 0.35 93
IV.NRCA.HNZ. 2021-04-14T03:21:16.33 0.1 positive manual P 321 8.9799 137 0.15 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHE. ML:2.6 0.006045 1.92 AML other m 2021-04-14T03:21:17.96
IV.NRCA.HNE. ML:2.6 0.0057259585 1.9312 AML other m 2021-04-14T03:21:17.97
IV.NRCA.HHN. ML:2.6 0.00535 1.9 AML other m 2021-04-14T03:21:18.97
IV.NRCA.HNN. ML:2.5 0.004605000000000001 1.9 AML other m 2021-04-14T03:21:18.97
IV.LNSS.HHE. ML:1.7 0.00035469060000000005 0.12 AML other m 2021-04-14T03:21:22.43
IV.LNSS.HNE. ML:1.7 0.00033825245 0.12 AML other m 2021-04-14T03:21:22.44
IV.LNSS.HHN. ML:1.8 0.00043386329999999993 0.1408 AML other m 2021-04-14T03:21:22.82
IV.LNSS.HNN. ML:1.8 0.00041371389999999994 0.1408 AML other m 2021-04-14T03:21:22.89
IV.RM33.EHN. ML:1.6 0.0002065 0.16 AML other m 2021-04-14T03:21:24.46
IV.FDMO.HHN. ML:1.4 0.000122822 0.2 AML other m 2021-04-14T03:21:24.39
IV.RM33.HNE. ML:1.8 0.00028679685 0.1296 AML other m 2021-04-14T03:21:24.66
IV.RM33.EHE. ML:1.8 0.00027800000000000004 0.14 AML other m 2021-04-14T03:21:24.66
IV.FDMO.HHE. ML:1.5 0.00015000000000000001 0.56 AML other m 2021-04-14T03:21:25.52
IV.CESI.HHE. ML:1.8 0.00022971295000000002 0.12 AML other m 2021-04-14T03:21:25.57
IV.CESI.HNE. ML:1.7 0.00022241925000000002 0.1104 AML other m 2021-04-14T03:21:25.52
IV.CESI.HHN. ML:2.0 0.000381730675 0.08 AML other m 2021-04-14T03:21:25.66
IV.CESI.HNN. ML:2.0 0.00037196642999999996 0.08 AML other m 2021-04-14T03:21:25.66
IV.TERO.HHN. ML:1.5 0.00010292736 0.0992 AML other m 2021-04-14T03:21:26.18
IV.CSP1.EHN. ML:2.0 0.00035999999999999997 0.24 AML other m 2021-04-14T03:21:26.39
IV.TERO.HHE. ML:1.4 0.00009265618 0.1008 AML other m 2021-04-14T03:21:26.70
IV.CSP1.EHE. ML:1.8 0.00026191935 0.24 AML other m 2021-04-14T03:21:27.16
IV.CESX.HHE. ML:1.2 0.00003989886 0.16 AML other m 2021-04-14T03:21:33.12
IV.CESX.HHN. ML:1.2 0.000037309405000000006 1.6192 AML other m 2021-04-14T03:21:34.91
IV.ATCC.EHN. ML:1.5 0.000057969044999999997 0.3008 AML other m 2021-04-14T03:21:34.46
IV.EL6.EHN. ML:1.6 0.00006982473 0.0992 AML other m 2021-04-14T03:21:35.23
IV.SSFR.HHE. ML:1.7 0.00006670648 0.1984 AML other m 2021-04-14T03:21:42.27
IV.SSFR.HHN. ML:1.6 0.000053026625 0.24 AML other m 2021-04-14T03:21:44.28
IV.FAGN.HHE. ML:1.5 0.00005391776 0.44 AML other m 2021-04-14T03:21:39.09
IV.FAGN.HHN. ML:1.4 0.0000431645 0.2992 AML other m 2021-04-14T03:21:40.01
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