Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.0 on date 31-12-2019 and time 22:10:18 (Italy) in region 5 km SW Norcia (PG)

A magnitude ML 1.0 earthquake occured in region: 5 km SW Norcia (PG), on

  • 31-12-2019 21:10:18 (UTC)
  • 31-12-2019 22:10:18 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.7580, 13.0600 at 10 km depth.

The earthquake was located by: Sala Sismica INGV-Roma.

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 5 4957 4957
Cascia PG 6 3217 8174
Poggiodomo PG 11 117 8291
Preci PG 14 724 9015
Cerreto di Spoleto PG 14 1075 10090
Monteleone di Spoleto PG 15 599 10689
Vallo di Nera PG 16 364 11053
Accumoli RI 17 667 11720
Castelsantangelo sul Nera MC 17 281 12001
Cittareale RI 18 482 12483
Sellano PG 18 1079 13562
Sant'Anatolia di Narco PG 18 564 14126
Scheggino PG 19 461 14587
Visso MC 20 1107 15694
Arquata del Tronto AP 20 1178 16872

Municipalities with at least 50000 inhabitants

An earthquake occurred to
37 Km SE of Foligno (57155 inhabitants)
40 Km NE of Terni (111501 inhabitants)
53 Km NW of L'Aquila (69753 inhabitants)
54 Km W of Teramo (54892 inhabitants)
67 Km SE of Perugia (166134 inhabitants)
87 Km E of Viterbo (67173 inhabitants)
89 Km NE of Guidonia Montecelio (88673 inhabitants)
91 Km N of Tivoli (56533 inhabitants)
93 Km W of Montesilvano (53738 inhabitants)
100 Km W of Pescara (121014 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
Reviewed
Rev100 		ML 1.0 2019-12-31
21:10:18		 42.758 13.0603 10 2019-12-31
21:16:08		 Sala Sismica INGV-Roma 75147951
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-12-31 21:10:18 ± 0.06
Latitude 42.7580 ± 0.0027
Longitude 13.0603 ± 0.0061
Depth (km) 10 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 75147951

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 457
Semi-minor axis of confidence ellipse (meter) 273
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 275
Circular confidence region, given by single value of horizontal uncertainty (meter) 460.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 72
Number of associated phases, regardless of their use for origin computation 26
Number of defining phases 25
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.23
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.40919
Number of stations at which the event was observed 14
Number of stations from which data was used for origin computation 13
Magnitude information

ML:1.0

Field Value
Value 1.0
Uncertainty 0.3
Num. used stations 17
Type of magnitude ML
Reference to an origin 75147951
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-12-31 21:16:08
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.EL6.EHZ. 2019-12-31T21:10:38.96 3.0 undecidable manual S -0.33 0
IV.MF5.EHZ. 2019-12-31T21:10:33.33 0.3 undecidable manual S 52 41.2254 50 0.94 53
IV.ASSB.HHZ. 2019-12-31T21:10:33.92 0.3 undecidable manual S 314 45.4212 50 0.43 65
IV.CSP1.EHZ. 2019-12-31T21:10:31.67 0.3 undecidable manual S 18 38.8278 50 -0.06 71
IV.CESI.HHZ. 2019-12-31T21:10:29.31 0.3 undecidable manual S 335 30.1476 50 -0.11 71
IV.FDMO.HHZ. 2019-12-31T21:10:29.21 0.3 undecidable manual S 4 30.9468 50 -0.42 66
IV.RM33.EHZ. 2019-12-31T21:10:29.19 0.3 undecidable manual S 155 30.3474 50 -0.28 69
IV.MMO1.EHZ. 2019-12-31T21:10:28.20 0.3 undecidable manual S 54 26.751 50 -0.3 69
IV.SMA1.EHZ. 2019-12-31T21:10:28.76 0.3 undecidable manual S 122 26.4513 50 0.32 69
IV.ASSB.HHZ. 2019-12-31T21:10:27.29 0.6 undecidable manual P 314 45.4212 50 0.05 47
IV.GUMA.HHZ. 2019-12-31T21:10:26.56 0.6 undecidable manual P 33 40.5261 50 0.08 47
IV.MF5.EHZ. 2019-12-31T21:10:26.92 1.0 negative manual P 52 41.2254 50 0.32 22
IV.CSP1.EHZ. 2019-12-31T21:10:26.04 0.6 undecidable manual P 18 38.8278 50 -0.19 46
IV.MC2.EHZ. 2019-12-31T21:10:26.60 0.3 undecidable manual S 32 19.9689 117 0.12 72
IV.GAVE.EHZ. 2019-12-31T21:10:25.22 0.3 undecidable manual S 242 15.3735 123 0.12 73
IV.LNSS.HHZ. 2019-12-31T21:10:25.59 0.3 undecidable manual S 185 17.2716 120 -0.07 73
IV.FDMO.HHZ. 2019-12-31T21:10:24.65 0.6 positive manual P 4 30.9468 50 -0.37 45
IV.RM33.EHZ. 2019-12-31T21:10:24.70 0.6 undecidable manual P 155 30.3474 50 -0.22 46
IV.MMO1.EHZ. 2019-12-31T21:10:24.04 1.0 negative manual P 54 26.751 50 -0.32 23
IV.CESI.HHZ. 2019-12-31T21:10:24.85 1.0 negative manual P 335 30.1476 50 -0.04 24
IV.SMA1.EHZ. 2019-12-31T21:10:24.33 0.6 positive manual P 122 26.4513 50 0 49
IV.NRCA.HHZ. 2019-12-31T21:10:23.39 0.3 undecidable manual S 28 9.4794 137 -0.13 73
IV.MC2.EHZ. 2019-12-31T21:10:23.17 0.6 positive manual P 32 19.9689 117 -0.02 49
IV.LNSS.HHZ. 2019-12-31T21:10:22.71 0.1 positive manual P 185 17.2716 120 -0.01 99
IV.GAVE.EHZ. 2019-12-31T21:10:22.45 0.1 positive manual P 242 15.3735 123 0.06 98
IV.NRCA.HHZ. 2019-12-31T21:10:21.51 0.1 undecidable manual P 28 9.4794 137 0.03 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHN. ML:1.4 0.00032900000000000003 0.16 AML other m 2019-12-31T21:10:23.39
IV.NRCA.HHE. ML:1.3 0.00027249999999999996 0.62 AML other m 2019-12-31T21:10:23.45
IV.GAVE.EHN. ML:1.3 0.00020750000000000003 0.2 AML other m 2019-12-31T21:10:25.35
IV.LNSS.HHN. ML:1.4 0.0002115 1.28 AML other m 2019-12-31T21:10:25.79
IV.GAVE.EHE. ML:1.3 0.0001885 0.22 AML other m 2019-12-31T21:10:25.87
IV.LNSS.HHE. ML:1.4 0.00022749999999999997 1.56 AML other m 2019-12-31T21:10:26.81
IV.FDMO.HHN. ML:0.9 0.0000385 0.2 AML other m 2019-12-31T21:10:29.76
IV.FDMO.HHE. ML:0.9 0.00003375 0.12 AML other m 2019-12-31T21:10:30.22
IV.SMA1.EHE. ML:0.7 0.0000313 0.34 AML other m 2019-12-31T21:10:30.46
IV.SMA1.EHN. ML:0.8 0.000034200000000000005 0.58 AML other m 2019-12-31T21:10:30.45
IV.GAVE.HNE. ML:1.4 0.00021501510000000002 0.2432 AML other m 2019-12-31T21:10:25.86
IV.RM33.EHE. ML:0.6 0.000019102625 0.1152 AML other m 2019-12-31T21:10:30.30
IV.RM33.EHN. ML:0.6 0.00002165918 0.1024 AML other m 2019-12-31T21:10:29.61
IV.CESI.HHE. ML:0.6 0.000020196315 0.1664 AML other m 2019-12-31T21:10:29.41
IV.CESI.HHN. ML:0.8 0.000030675065 0.2048 AML other m 2019-12-31T21:10:29.43
IV.ASSB.HHE. ML:0.5 0.0000110688615 0.3328 AML other m 2019-12-31T21:10:33.85
IV.ASSB.HHN. ML:0.8 0.000018068635 0.1536 AML other m 2019-12-31T21:10:34.92
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