Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.1 on date 28-07-2020 and time 08:17:11 (Italy) in region 2 km S Norcia (PG)

A magnitude ML 1.1 earthquake occured in region: 2 km S Norcia (PG), on

  • 28-07-2020 06:17:11 (UTC)
  • 28-07-2020 08:17:11 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.7760, 13.0960 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 2 4957 4957
Cascia PG 9 3217 8174
Preci PG 12 724 8898
Castelsantangelo sul Nera MC 14 281 9179
Poggiodomo PG 15 117 9296
Accumoli RI 15 667 9963
Cerreto di Spoleto PG 15 1075 11038
Arquata del Tronto AP 17 1178 12216
Visso MC 17 1107 13323
Monteleone di Spoleto PG 18 599 13922
Cittareale RI 18 482 14404
Sellano PG 19 1079 15483
Vallo di Nera PG 19 364 15847
Ussita MC 19 444 16291

Municipalities with at least 50000 inhabitants

An earthquake occurred to
38 Km SE of Foligno (57155 inhabitants)
44 Km NE of Terni (111501 inhabitants)
51 Km W of Teramo (54892 inhabitants)
53 Km NW of L'Aquila (69753 inhabitants)
68 Km SE of Perugia (166134 inhabitants)
90 Km E of Viterbo (67173 inhabitants)
91 Km W of Montesilvano (53738 inhabitants)
91 Km NE of Guidonia Montecelio (88673 inhabitants)
93 Km N of Tivoli (56533 inhabitants)
98 Km W of Pescara (121014 inhabitants)
100 Km W of Chieti (51815 inhabitants)
100 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 2020-07-28
06:17:11		 42.7757 13.096 10 2020-11-19
12:36:55		 Bollettino Sismico Italiano INGV 81629531
Reviewed
Rev100 		ML 1.5 2020-07-28
06:17:11		 42.7695 13.1017 10 2020-07-28
06:23:38		 Sala Sismica INGV-Roma 81414231
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-07-28 06:17:11 ± 0.06
Latitude 42.7757 ± 0.0027
Longitude 13.0960 ± 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 81629531

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 373
Semi-minor axis of confidence ellipse (meter) 115
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 81
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) 55
Number of associated phases, regardless of their use for origin computation 55
Number of defining phases 36
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.27
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.40290
Number of stations at which the event was observed 37
Number of stations from which data was used for origin computation 18
Magnitudes information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.8
Num. used stations 20
Type of magnitude ML
Reference to an origin 81414231
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-07-28 06:23:38

ML:1.1

Field Value
Value 1.1
Uncertainty 0.3
Num. used stations 12
Type of magnitude ML
Reference to an origin 81629531
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-08-04 08:36:05
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
SI.BOSI.HHZ. 2020-07-28T06:18:51.50 3.0 undecidable manual Sg 7.18 0
IV.CMPR.HHZ. 2020-07-28T06:18:46.51 3.0 undecidable manual Sg 11.36 0
IV.ZONE.HHZ. 2020-07-28T06:18:38.25 3.0 undecidable manual Sg 5.85 0
OX.CIMO.HHZ. 2020-07-28T06:18:37.51 3.0 undecidable manual Sn -2.11 0
IV.PANTE.HHZ. 2020-07-28T06:18:33.85 3.0 positive manual Pg 8.54 0
MN.CLTB.HHZ. 2020-07-28T06:18:30.86 3.0 positive manual Pg 14.81 0
IV.CROCE.HHZ. 2020-07-28T06:18:25.25 3.0 undecidable manual Pn -4.29 0
ST.PANI.EHZ. 2020-07-28T06:18:24.85 3.0 undecidable manual Sn -8.65 0
IV.MTMR.EHZ. 2020-07-28T06:18:19.13 3.0 undecidable manual Sn -2.11 0
SL.KOGS.BHZ. 2020-07-28T06:18:19.12 3.0 negative manual Pg 7.72 0
IV.VBKN.HHZ. 2020-07-28T06:18:12.03 3.0 undecidable manual Sn -2.8 0
IV.ROSPO.HHZ. 2020-07-28T06:18:09.98 3.0 undecidable manual Sg 4.25 0
CR.STON.BHZ. 2020-07-28T06:18:06.64 3.0 undecidable manual Pn 3.7 0
IV.CRTC.HHZ. 2020-07-28T06:17:37.67 3.0 undecidable manual Sn -4.24 0
IV.RMP.HHZ. 2020-07-28T06:17:33.92 3.0 undecidable manual S -1.41 0
IV.IMOL.HNZ. 2020-07-28T06:17:30.17 3.0 negative manual Pg 2.39 0
IV.MOMA.HNZ. 2020-07-28T06:17:26.12 0.3 undecidable manual S 274 42.9237 50 0.82 57
IV.TERO.HHZ. 2020-07-28T06:17:25.84 0.3 undecidable manual S 112 44.7219 50 0.06 72
IV.PF6.EHN. 2020-07-28T06:17:24.76 0.3 undecidable manual S 11 40.9257 50 -0.01 73
IV.MML1.HNE. 2020-07-28T06:17:24.05 0.1 undecidable manual S 345 38.8278 50 -0.15 95
IV.CAMP.HHE. 2020-07-28T06:17:23.67 0.3 undecidable manual S 136 36.8298 50 -0.01 73
IV.CSP1.EHZ. 2020-07-28T06:17:23.71 0.1 undecidable manual S 14 36.1416 50 0.22 94
IV.RM33.HNE. 2020-07-28T06:17:21.81 0.3 undecidable manual S 162 31.1466 50 -0.34 69
IV.CESI.HHE. 2020-07-28T06:17:21.56 0.3 undecidable manual S 329 29.8479 50 -0.23 71
IV.FDMO.HHZ. 2020-07-28T06:17:21.37 0.1 undecidable manual S 359 28.9488 50 -0.19 95
IV.SMA1.EHZ. 2020-07-28T06:17:21.16 0.3 undecidable manual S 129 25.2525 111 0.62 64
IT.MTCL.HGZ. 2020-07-28T06:17:20.26 0.3 undecidable manual S 342 25.4523 111 -0.33 70
IV.MOMA.HNZ. 2020-07-28T06:17:20.10 0.3 undecidable manual P 274 42.9237 50 0.8 58
IV.MTRA.EHZ. 2020-07-28T06:17:20.03 0.1 undecidable manual S 95 24.5532 112 -0.28 94
IV.MMO1.EHZ. 2020-07-28T06:17:19.78 0.1 undecidable manual S 54 23.2545 113 -0.11 98
IV.TERO.HHZ. 2020-07-28T06:17:19.50 0.1 undecidable manual P 112 44.7219 50 -0.08 95
IV.PF6.EHN. 2020-07-28T06:17:19.01 0.3 undecidable manual P 11 40.9257 50 0.01 73
IV.CSP1.EHZ. 2020-07-28T06:17:18.45 0.1 undecidable manual P 14 36.1416 50 0.19 94
IV.MML1.HNE. 2020-07-28T06:17:18.77 0.1 undecidable manual P 345 38.8278 50 0.1 96
IV.LNSS.HHZ. 2020-07-28T06:17:18.50 0.1 undecidable manual S 193 19.6692 117 -0.27 95
IV.CAMP.HHE. 2020-07-28T06:17:18.13 0.3 undecidable manual P 136 36.8298 50 -0.24 70
IV.FEMA.HNZ. 2020-07-28T06:17:18.98 0.3 undecidable manual S 350 21.0678 115 -0.2 72
IV.MC2.EHZ. 2020-07-28T06:17:18.22 0.1 undecidable manual S 27 16.872 120 0.32 95
IV.GAVE.EHZ. 2020-07-28T06:17:18.15 0.1 undecidable manual S 241 18.87 118 -0.36 94
IV.RM33.HNE. 2020-07-28T06:17:17.26 0.1 undecidable manual P 162 31.1466 50 -0.22 94
IV.CESI.HHE. 2020-07-28T06:17:17.18 0.3 undecidable manual P 329 29.8479 50 -0.1 73
IV.FDMO.HHZ. 2020-07-28T06:17:16.59 0.1 undecidable manual P 359 28.9488 50 -0.56 87
IV.SMA1.EHZ. 2020-07-28T06:17:16.88 0.3 undecidable manual P 129 25.2525 111 0.32 70
IV.MTRA.EHZ. 2020-07-28T06:17:16.35 0.1 positive manual P 95 24.5532 112 -0.07 99
IV.PE3.EHZ. 2020-07-28T06:17:16.48 3.0 negative manual P -2.95 0
IV.MMO1.EHZ. 2020-07-28T06:17:16.30 0.1 undecidable manual P 54 23.2545 113 0.12 98
IT.MTCL.HGZ. 2020-07-28T06:17:16.50 0.3 undecidable manual P 342 25.4523 111 -0.09 74
IV.FEMA.HNZ. 2020-07-28T06:17:16.09 0.3 undecidable manual P 350 21.0678 115 0.32 71
IV.MC2.EHZ. 2020-07-28T06:17:15.32 0.1 positive manual P 27 16.872 120 0.29 96
IV.GAVE.EHZ. 2020-07-28T06:17:15.52 0.1 negative manual P 241 18.87 118 0.13 98
IV.NRCA.HHZ. 2020-07-28T06:17:15.00 0.1 undecidable manual S 13 6.5934 146 -0.24 98
IV.LNSS.HHZ. 2020-07-28T06:17:15.71 0.1 positive manual P 193 19.6692 117 0.18 97
IV.NRCA.HHZ. 2020-07-28T06:17:13.65 0.1 positive manual P 13 6.5934 146 0.15 100
IV.ARRO.EHZ. 2020-07-28T06:17:07.92 3.0 positive manual P -2.77 0
IV.MCIV.CHZ. 2020-07-28T06:17:02.01 3.0 undecidable manual S -3.82 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHN. ML:1.6 0.0006045 0.14 AML other m 2020-07-28T06:17:15.04
IV.NRCA.HNN. ML:1.6 0.0005560000000000001 0.16 AML other m 2020-07-28T06:17:15.04
IV.NRCA.HHE. ML:1.5 0.000482 1.26 AML other m 2020-07-28T06:17:15.16
IV.GAVE.EHN. ML:1.0 0.00007805000000000001 0.34 AML other m 2020-07-28T06:17:18.64
IV.LNSS.HHE. ML:1.0 0.00007350000000000001 1 AML other m 2020-07-28T06:17:18.40
IV.LNSS.HHN. ML:1.0 0.0000807 0.14 AML other m 2020-07-28T06:17:19.39
IV.GAVE.EHE. ML:1.2 0.00011619999999999999 0.88 AML other m 2020-07-28T06:17:19.34
IV.MTRA.EHE. ML:1.1 0.00007664999999999999 0.68 AML other m 2020-07-28T06:17:20.39
IV.FDMO.HHN. ML:0.9 0.0000395 1.24 AML other m 2020-07-28T06:17:21.96
IV.FDMO.HHE. ML:0.8 0.000032600000000000006 0.68 AML other m 2020-07-28T06:17:21.97
IV.NRCA.HNE. ML:1.4 0.00044234704999999996 0.1824 AML other m 2020-07-28T06:17:15.17
IV.MTRA.EHN. ML:0.9 0.000043407455 0.3616 AML other m 2020-07-28T06:17:20.34
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