Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.1 on date 05-04-2021 and time 04:15:50 (Italy) in region 6 km SE Norcia (PG)

A magnitude ML 1.1 earthquake occured in region: 6 km SE Norcia (PG), on

  • 05-04-2021 02:15:50 (UTC)
  • 05-04-2021 04:15:50 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.7640, 13.1610 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.

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
Norcia PG 6 4957 4957
Accumoli RI 10 667 5624
Arquata del Tronto AP 11 1178 6802
Cascia PG 13 3217 10019
Castelsantangelo sul Nera MC 15 281 10300
Preci PG 16 724 11024
Cittareale RI 16 482 11506
Montegallo AP 17 523 12029
Amatrice RI 18 2657 14686
Poggiodomo PG 19 117 14803
Visso MC 20 1107 15910

Municipalities with at least 50000 inhabitants

An earthquake occurred to
43 Km SE of Foligno (57155 inhabitants)
46 Km W of Teramo (54892 inhabitants)
48 Km E of Terni (111501 inhabitants)
50 Km NW of L'Aquila (69753 inhabitants)
74 Km SE of Perugia (166134 inhabitants)
86 Km W of Montesilvano (53738 inhabitants)
92 Km NE of Guidonia Montecelio (88673 inhabitants)
92 Km W of Pescara (121014 inhabitants)
94 Km NE of Tivoli (56533 inhabitants)
94 Km W of Chieti (51815 inhabitants)
95 Km E of Viterbo (67173 inhabitants)
99 Km SW 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 1.1 2021-04-05
02:15:50		 42.7643 13.1612 11 2021-07-12
16:55:11		 Bollettino Sismico Italiano INGV 90092971
Reviewed
Rev100 		ML 1.1 2021-04-05
02:15:50		 42.7662 13.157 10 2021-04-05
02:21:36		 Sala Sismica INGV-Roma 88780181
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-04-05 02:15:50 ± 0.05
Latitude 42.7643 ± 0.0027
Longitude 13.1612 ± 0.0061
Depth (km) 11 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 90092971

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 369
Semi-minor axis of confidence ellipse (meter) 312
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 271
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) 48
Number of associated phases, regardless of their use for origin computation 32
Number of defining phases 32
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.21
Epicentral distance of station closest to the epicenter (degree) 0.07734
Epicentral distance of station farthest from the epicenter (degree) 0.43527
Number of stations at which the event was observed 16
Number of stations from which data was used for origin computation 16
Magnitudes information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.3
Num. used stations 33
Type of magnitude ML
Reference to an origin 90092971
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-05-14 14:18:38

ML:1.1

Field Value
Value 1.1
Uncertainty 0.3
Num. used stations 33
Type of magnitude ML
Reference to an origin 88780181
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-04-05 02:21:36
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MOMA.HHZ. 2021-04-05T02:16:06.24 0.6 undecidable manual S 275 48.3183 50 0.51 41
IV.TERO.HHZ. 2021-04-05T02:16:03.13 0.6 undecidable manual S 113 39.3273 50 -0.21 46
IV.CSP1.EHZ. 2021-04-05T02:16:02.86 0.6 undecidable manual S 6 36.5412 50 0.29 45
IV.MF5.EHZ. 2021-04-05T02:16:02.98 0.6 undecidable manual S 44 34.743 50 0.89 36
IV.CESI.HHZ. 2021-04-05T02:16:01.66 0.6 undecidable manual S 322 33.8439 50 -0.21 47
IV.FDMO.HHZ. 2021-04-05T02:16:00.80 0.6 undecidable manual S 349 30.747 50 -0.25 47
IV.RM33.EHZ. 2021-04-05T02:16:00.42 0.6 undecidable manual S 171 28.6491 50 -0.06 48
IV.MOMA.HHZ. 2021-04-05T02:15:59.49 0.3 undecidable manual P 275 48.3183 50 0.28 66
IV.LNSS.HHZ. 2021-04-05T02:15:58.31 0.6 undecidable manual S 209 20.4684 50 0.02 48
IV.SMA1.EHZ. 2021-04-05T02:15:58.20 0.6 undecidable manual S 136 20.5683 50 -0.12 49
IV.FEMA.HNE. 2021-04-05T02:15:58.85 0.6 undecidable manual S 338 23.754 50 -0.31 46
IV.GAVE.EHZ. 2021-04-05T02:15:58.67 0.6 undecidable manual S 250 23.1546 50 -0.35 46
IV.MMO1.EHZ. 2021-04-05T02:15:58.00 0.6 undecidable manual S 42 20.1687 50 -0.21 48
IV.MTRA.EHZ. 2021-04-05T02:15:57.60 0.6 undecidable manual S 92 19.1697 119 -0.34 47
IV.MF5.EHZ. 2021-04-05T02:15:57.52 0.1 undecidable manual P 44 34.743 50 0.41 87
IV.T1299.EHE. 2021-04-05T02:15:57.63 0.3 undecidable manual S 146 17.4714 122 0.2 71
IV.CSP1.EHZ. 2021-04-05T02:15:57.20 0.3 undecidable manual P 6 36.5412 50 -0.19 70
IV.TERO.HHZ. 2021-04-05T02:15:57.58 0.1 undecidable manual P 113 39.3273 50 -0.25 91
IV.MC2.EHZ. 2021-04-05T02:15:57.28 0.6 undecidable manual S 8 16.4724 123 0.15 48
IV.RM33.EHZ. 2021-04-05T02:15:56.07 0.1 undecidable manual P 171 28.6491 50 -0.11 96
IV.FDMO.HHZ. 2021-04-05T02:15:56.22 0.1 undecidable manual P 349 30.747 50 -0.28 92
IV.CESI.HHZ. 2021-04-05T02:15:56.77 0.3 undecidable manual P 322 33.8439 50 -0.21 70
IV.FEMA.HNE. 2021-04-05T02:15:55.53 0.3 undecidable manual P 338 23.754 50 0.11 71
IV.GAVE.EHZ. 2021-04-05T02:15:55.22 0.3 undecidable manual P 250 23.1546 50 -0.11 72
IV.MC2.EHZ. 2021-04-05T02:15:54.28 0.1 undecidable manual P 8 16.4724 123 0.04 99
IV.MMO1.EHZ. 2021-04-05T02:15:54.71 0.1 undecidable manual P 42 20.1687 50 -0.16 96
IV.MTRA.EHZ. 2021-04-05T02:15:54.47 0.1 undecidable manual P 92 19.1697 119 -0.24 95
IV.LNSS.HHZ. 2021-04-05T02:15:54.84 0.1 positive manual P 209 20.4684 50 -0.07 98
IV.NRCA.HHZ. 2021-04-05T02:15:54.89 0.6 undecidable manual S 334 8.5803 141 -0.18 47
IV.T1299.EHE. 2021-04-05T02:15:54.60 0.1 undecidable manual P 146 17.4714 122 0.19 95
IV.SMA1.EHZ. 2021-04-05T02:15:54.84 0.1 undecidable manual P 136 20.5683 50 -0.09 98
IV.NRCA.HHZ. 2021-04-05T02:15:53.15 0.1 undecidable manual P 334 8.5803 141 0.09 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HNE. ML:1.6 0.00051256755 0.08 AML other m 2021-04-05T02:15:54.97
IV.NRCA.HHE. ML:1.6 0.00049365695 0.0608 AML other m 2021-04-05T02:15:54.97
IV.NRCA.HNN. ML:1.5 0.00041355209999999995 0.08 AML other m 2021-04-05T02:15:54.93
IV.NRCA.HHN. ML:1.6 0.00049570415 0.08 AML other m 2021-04-05T02:15:54.93
IV.MTRA.HNE. ML:1.2 0.000110996425 0.8208 AML other m 2021-04-05T02:15:57.76
IV.MTRA.EHN. ML:0.9 0.00006137666 0.1392 AML other m 2021-04-05T02:15:58.13
IV.LNSS.HHE. ML:1.2 0.00010437065000000001 0.12 AML other m 2021-04-05T02:15:58.81
IV.MTRA.EHE. ML:1.0 0.00008427100500000001 0.1792 AML other m 2021-04-05T02:15:59.11
IV.GAVE.EHN. ML:1.1 0.000083600605 0.16 AML other m 2021-04-05T02:15:59.19
IV.SMA1.EHE. ML:0.9 0.00005835712 0.16 AML other m 2021-04-05T02:15:59.45
IV.GAVE.HNE. ML:1.3 0.00011626898499999999 0.1488 AML other m 2021-04-05T02:15:59.64
IV.GAVE.EHE. ML:1.2 0.00009207426499999998 0.1808 AML other m 2021-04-05T02:15:59.80
IV.LNSS.HHN. ML:1.0 0.0000681092 0.1584 AML other m 2021-04-05T02:16:00.10
IV.GAVE.HNN. ML:1.6 0.0002498454 0.76 AML other m 2021-04-05T02:16:00.53
IV.MTRA.HNN. ML:1.2 0.00012292322 0.64 AML other m 2021-04-05T02:16:00.34
IV.LNSS.HNE. ML:1.2 0.000109726425 0.3392 AML other m 2021-04-05T02:16:00.56
IV.RM33.EHE. ML:1.0 0.000051281155 0.1392 AML other m 2021-04-05T02:16:00.88
IV.FDMO.HHE. ML:0.6 0.000021308270000000002 0.12 AML other m 2021-04-05T02:16:01.42
IV.RM33.HNE. ML:1.2 0.00009199072999999999 0.0416 AML other m 2021-04-05T02:16:01.52
IV.RM33.EHN. ML:1.0 0.000047209219999999997 0.12 AML other m 2021-04-05T02:16:01.59
IV.CESI.HHN. ML:0.9 0.000031035486 0.16 AML other m 2021-04-05T02:16:02.10
IV.CESI.HHE. ML:0.9 0.00002951711 0.2192 AML other m 2021-04-05T02:16:02.33
IV.FDMO.HHN. ML:0.6 0.000018337310000000002 0.1792 AML other m 2021-04-05T02:16:02.90
IV.SMA1.EHN. ML:0.8 0.00004959431 1.7392 AML other m 2021-04-05T02:16:03.94
IV.MF5.EHN. ML:1.4 0.00009727105999999999 1.0992 AML other m 2021-04-05T02:16:03.20
IV.TERO.HNE. ML:1.4 0.000086326605 1.44 AML other m 2021-04-05T02:16:03.21
IV.TERO.HHN. ML:0.9 0.000027357304999999997 0.08 AML other m 2021-04-05T02:16:03.44
IV.TERO.HHE. ML:0.9 0.000024126380000000002 0.12 AML other m 2021-04-05T02:16:03.90
IV.LNSS.HNN. ML:1.2 0.00009900890500000001 0.6608 AML other m 2021-04-05T02:16:05.34
IV.MOMA.HHE. ML:1.0 0.000022528225 0.16 AML other m 2021-04-05T02:16:07.43
IV.TERO.HNN. ML:1.7 0.00017144925 0.8096 AML other m 2021-04-05T02:16:08.13
IV.MOMA.HNE. ML:1.7 0.000139854635 1.08 AML other m 2021-04-05T02:16:09.34
IV.MOMA.HHN. ML:1.0 0.000025551965 1.6592 AML other m 2021-04-05T02:16:12.95
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