Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.6 on date 28-04-2020 and time 17:15:35 (Italy) in region 4 km E Norcia (PG)

A magnitude ML 1.6 earthquake occured in region: 4 km E Norcia (PG), on

  • 28-04-2020 15:15:35 (UTC)
  • 28-04-2020 17:15:35 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.7980, 13.1410 at 7 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 11 281 5238
Preci PG 12 724 5962
Arquata del Tronto AP 13 1178 7140
Cascia PG 14 3217 10357
Accumoli RI 14 667 11024
Visso MC 16 1107 12131
Ussita MC 16 444 12575
Montegallo AP 17 523 13098
Cerreto di Spoleto PG 18 1075 14173
Montemonaco AP 19 604 14777
Poggiodomo PG 19 117 14894
Cittareale RI 20 482 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)
49 Km W of Teramo (54892 inhabitants)
54 Km NW of L'Aquila (69753 inhabitants)
70 Km E of Perugia (166134 inhabitants)
88 Km W of Montesilvano (53738 inhabitants)
95 Km E of Viterbo (67173 inhabitants)
95 Km NE of Guidonia Montecelio (88673 inhabitants)
95 Km W of Pescara (121014 inhabitants)
96 Km SW of Ancona (100861 inhabitants)
97 Km N of Tivoli (56533 inhabitants)
98 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 1.6 2020-04-28
15:15:35		 42.7978 13.1412 7 2020-07-18
21:08:39		 Bollettino Sismico Italiano INGV 79929841
Reviewed
Rev100 		ML 1.5 2020-04-28
15:15:35		 42.7977 13.1473 7 2020-04-28
15:25:19		 Sala Sismica INGV-Roma 78647821
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-04-28 15:15:35 ± 0.06
Latitude 42.7978 ± 0.0027
Longitude 13.1412 ± 0.0049
Depth (km) 7 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 79929841

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 351
Semi-minor axis of confidence ellipse (meter) 263
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 259
Circular confidence region, given by single value of horizontal uncertainty (meter) 350.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 63
Number of associated phases, regardless of their use for origin computation 59
Number of defining phases 45
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.29
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 3.95072
Number of stations at which the event was observed 36
Number of stations from which data was used for origin computation 24
Magnitudes information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.3
Num. used stations 29
Type of magnitude ML
Reference to an origin 79929841
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-06-05 14:41:01

ML:1.5

Field Value
Value 1.5
Uncertainty 0.2
Num. used stations 14
Type of magnitude ML
Reference to an origin 78647821
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-04-28 15:25:19
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
CR.STON.BHZ. 2020-04-28T15:17:05.74 3.0 undecidable manual Sn 3.29 0
IV.SARZ.HHZ. 2020-04-28T15:17:04.62 3.0 undecidable manual Sg 13.95 0
OX.CIMO.HHZ. 2020-04-28T15:16:44.98 3.0 undecidable manual Sg 1.29 0
IV.GATE.HHZ. 2020-04-28T15:16:44.58 3.0 undecidable manual Sg 9.68 0
IV.PTRJ.HNZ. 2020-04-28T15:16:43.19 3.0 undecidable manual Sg 9.2 0
IV.TDS.HHZ. 2020-04-28T15:16:30.29 3.0 undecidable manual P 438.5277 -6.99 0
IV.MNTV.HNZ. 2020-04-28T15:16:30.08 3.0 undecidable manual Sn 1.78 0
IV.ROSPO.HHZ. 2020-04-28T15:16:22.23 3.0 undecidable manual Sn -0.21 0
IV.GIUL.HHZ. 2020-04-28T15:16:20.33 3.0 undecidable manual S 137.862 4.74 0
IV.GIUL.HHZ. 2020-04-28T15:15:59.28 3.0 undecidable manual P 137.862 0.65 0
IV.GIGS.HHZ. 2020-04-28T15:15:52.14 0.3 undecidable manual S 137 52.0035 50 -0.54 62
IV.CESX.HHZ. 2020-04-28T15:15:52.85 3.0 undecidable manual S 245 49.8168 50 0.75 0
IV.MAON.HHZ. 2020-04-28T15:15:50.83 3.0 undecidable manual P 169.1085 -9.99 0
IV.MOMA.HHE. 2020-04-28T15:15:50.95 0.6 undecidable manual S 271 46.5201 50 -0.26 45
IV.ARRO.EHZ. 2020-04-28T15:15:49.29 0.6 undecidable manual S 232 39.0276 50 0.06 47
IV.SAP2.EHE. 2020-04-28T15:15:49.80 0.6 undecidable manual S 32 39.2274 50 0.53 42
IV.TERO.HHZ. 2020-04-28T15:15:49.58 0.3 undecidable manual S 117 42.4242 50 -0.55 63
IV.PF6.EHN. 2020-04-28T15:15:48.28 0.6 undecidable manual S 7 37.9287 101 -0.6 41
IV.CAMP.HHZ. 2020-04-28T15:15:47.95 0.6 undecidable manual S 143 36.3414 101 -0.39 44
IV.MF5.EHN. 2020-04-28T15:15:47.82 0.6 undecidable manual S 51 33.3444 102 0.5 43
IV.RM33.EHZ. 2020-04-28T15:15:47.00 0.6 undecidable manual S 169 32.6451 102 -0.06 48
IV.GUMA.HHZ. 2020-04-28T15:15:47.39 0.3 undecidable manual S 28 33.3444 102 0.09 71
IV.CESI.HHZ. 2020-04-28T15:15:46.31 0.3 undecidable manual S 320 29.9478 103 0.15 71
MN.AQU.HNN. 2020-04-28T15:15:46.66 0.6 undecidable manual P 156 53.7018 50 0.98 34
IV.CSP1.EHZ. 2020-04-28T15:15:46.91 0.3 undecidable manual S 9 33.0447 102 -0.28 68
IV.GIGS.HHZ. 2020-04-28T15:15:45.20 1.0 undecidable manual P 137 52.0035 50 -0.21 22
IV.CESX.HHZ. 2020-04-28T15:15:45.82 0.1 undecidable manual P 245 49.8168 50 0.75 76
IV.MNTT.EHZ. 2020-04-28T15:15:44.93 0.1 undecidable manual P 51 47.1195 50 0.27 89
IV.SMA1.EHE. 2020-04-28T15:15:44.52 0.6 undecidable manual S 139 24.3534 106 0.22 47
IV.T1299.HNN. 2020-04-28T15:15:44.18 0.6 undecidable manual S 148 21.4674 108 0.85 38
IT.MTCL.HGZ. 2020-04-28T15:15:44.17 0.6 undecidable manual S 332 24.5532 106 -0.19 47
IV.FDMO.HHZ. 2020-04-28T15:15:44.89 0.3 undecidable manual S 351 26.8509 105 -0.22 70
IV.MOMA.HHE. 2020-04-28T15:15:44.49 0.1 undecidable manual P 271 46.5201 50 -0.07 93
IV.RONT.HHZ. 2020-04-28T15:15:43.75 3.0 undecidable manual P 191.1642 -9.99 0
IV.MTRA.EHZ. 2020-04-28T15:15:43.55 0.3 undecidable manual S 102 21.2676 109 0.28 70
IV.ARRO.EHZ. 2020-04-28T15:15:43.01 1.0 negative manual P 232 39.0276 50 -0.4 22
IV.PF6.EHN. 2020-04-28T15:15:43.21 0.6 undecidable manual P 7 37.9287 101 0 48
IV.SAP2.EHE. 2020-04-28T15:15:43.80 0.1 undecidable manual P 32 39.2274 50 0.36 88
IV.FEMA.HNE. 2020-04-28T15:15:43.09 0.6 undecidable manual S 338 19.6692 110 0.35 46
IV.TERO.HHZ. 2020-04-28T15:15:43.37 0.1 undecidable manual P 117 42.4242 50 -0.56 83
IV.MMO1.EHZ. 2020-04-28T15:15:42.31 0.1 undecidable manual S 53 18.87 111 -0.16 96
IV.GUMA.HHZ. 2020-04-28T15:15:42.11 0.1 undecidable manual P 28 33.3444 102 -0.19 93
IV.CAMP.HHZ. 2020-04-28T15:15:42.69 0.6 negative manual P 143 36.3414 101 -0.21 46
IV.MF5.EHN. 2020-04-28T15:15:42.37 0.1 undecidable manual P 51 33.3444 102 0.06 95
IV.CSP1.EHZ. 2020-04-28T15:15:42.09 0.1 undecidable manual P 9 33.0447 102 -0.15 94
IV.CESI.HHZ. 2020-04-28T15:15:41.51 0.1 undecidable manual P 320 29.9478 103 -0.13 94
IV.RM33.EHZ. 2020-04-28T15:15:41.99 0.1 undecidable manual P 169 32.6451 102 -0.17 93
IV.MC2.EHZ. 2020-04-28T15:15:41.10 0.3 undecidable manual S 17 13.1757 118 0.43 69
IV.FDMO.HHZ. 2020-04-28T15:15:40.90 0.1 undecidable manual P 351 26.8509 105 -0.14 95
IV.FEMA.HNE. 2020-04-28T15:15:40.42 0.6 undecidable manual P 338 19.6692 110 0.76 40
IV.MTRA.EHZ. 2020-04-28T15:15:40.03 0.1 undecidable manual P 102 21.2676 109 0.06 97
IV.SMA1.EHE. 2020-04-28T15:15:40.39 0.1 undecidable manual P 139 24.3534 106 -0.18 94
IV.T1299.HNN. 2020-04-28T15:15:40.46 0.3 undecidable manual P 148 21.4674 108 0.45 67
IT.MTCL.HGZ. 2020-04-28T15:15:40.50 0.1 undecidable manual P 332 24.5532 106 -0.11 96
IV.MMO1.EHZ. 2020-04-28T15:15:39.36 0.1 undecidable manual P 53 18.87 111 -0.15 96
IV.MC2.EHZ. 2020-04-28T15:15:38.68 0.1 undecidable manual P 17 13.1757 118 0.2 96
IV.NRCA.HNZ. 2020-04-28T15:15:38.09 0.1 undecidable manual S 331 4.4955 148 -0.32 95
IV.NRCA.HNZ. 2020-04-28T15:15:37.10 0.1 undecidable manual P 331 4.4955 148 -0.07 100
IV.MMUR.HNZ. 2020-04-28T15:15:28.60 3.0 undecidable manual S -0.26 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MTRA.HNN. ML:1.8 0.0004595 0.38 AML other m 2020-04-28T15:15:44.35
IV.MTRA.EHN. ML:1.8 0.0004525 0.38 AML other m 2020-04-28T15:15:44.16
IV.MTRA.EHE. ML:2.0 0.0007965 0.18 AML other m 2020-04-28T15:15:44.69
IV.MTRA.HNE. ML:2.0 0.0007855 0.18 AML other m 2020-04-28T15:15:44.69
IV.FDMO.HHE. ML:1.6 0.000217 0.74 AML other m 2020-04-28T15:15:46.31
IV.CESI.HNE. ML:1.4 0.00013853749500000002 1.1904 AML other m 2020-04-28T15:15:47.08
IV.RM33.EHN. ML:1.6 0.0001595 0.98 AML other m 2020-04-28T15:15:47.70
IV.CESI.HHN. ML:1.9 0.00036899999999999997 0.3 AML other m 2020-04-28T15:15:47.85
IV.CESI.HNN. ML:1.9 0.0004008935 1.024 AML other m 2020-04-28T15:15:47.19
IV.RM33.HNE. ML:1.6 0.00018366179999999998 1.5616 AML other m 2020-04-28T15:15:48.52
IV.RM33.HNN. ML:1.6 0.0001651874 0.8448 AML other m 2020-04-28T15:15:47.38
IV.FDMO.HHN. ML:1.6 0.0002065 1.68 AML other m 2020-04-28T15:15:47.03
IV.CSP1.EHE. ML:1.8 0.000259 1.7 AML other m 2020-04-28T15:15:48.85
IV.GUMA.HNN. ML:2.2 0.0006589781 0.5376 AML other m 2020-04-28T15:15:47.75
IV.CAMP.HHN. ML:1.2 0.00006584999999999999 0.58 AML other m 2020-04-28T15:15:48.30
IV.CAMP.HHE. ML:1.2 0.0000654 0.72 AML other m 2020-04-28T15:15:48.46
IV.GUMA.HHE. ML:2.1 0.0005880000000000001 1.28 AML other m 2020-04-28T15:15:48.14
IV.GUMA.HNE. ML:2.1 0.0006174242999999999 0.3072 AML other m 2020-04-28T15:15:48.67
IV.GUMA.HHN. ML:2.1 0.0005475 0.5 AML other m 2020-04-28T15:15:48.59
IV.RM33.EHE. ML:1.5 0.0001315 0.32 AML other m 2020-04-28T15:15:49.50
IV.TERO.HHN. ML:1.6 0.00011399999999999999 0.46 AML other m 2020-04-28T15:15:49.61
IV.TERO.HNE. ML:1.5 0.00010473229 1.0368 AML other m 2020-04-28T15:15:50.16
IV.CESI.HHE. ML:1.6 0.0001785 1.58 AML other m 2020-04-28T15:15:50.05
IV.TERO.HHE. ML:1.4 0.0000897 1 AML other m 2020-04-28T15:15:50.60
IV.CSP1.EHN. ML:1.6 0.000182 0.72 AML other m 2020-04-28T15:15:50.83
IV.ARRO.EHN. ML:1.4 0.00007915 0.26 AML other m 2020-04-28T15:15:52.02
IV.ARRO.EHE. ML:1.3 0.0000727 0.18 AML other m 2020-04-28T15:15:52.39
IV.CESX.HHN. ML:1.4 0.0000759 0.26 AML other m 2020-04-28T15:15:54.82
IV.CESX.HHE. ML:1.3 0.000051699999999999996 0.58 AML other m 2020-04-28T15:15:55.12
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