Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.1 on date 18-12-2019 and time 15:13:00 (Italy) in region 3 km NE Norcia (PG)

A magnitude ML 1.1 earthquake occured in region: 3 km NE Norcia (PG), on

  • 18-12-2019 14:13:00 (UTC)
  • 18-12-2019 15:13:00 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.8060, 13.1190 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 3 4957 4957
Castelsantangelo sul Nera MC 10 281 5238
Preci PG 10 724 5962
Cascia PG 13 3217 9179
Visso MC 14 1107 10286
Arquata del Tronto AP 15 1178 11464
Ussita MC 16 444 11908
Accumoli RI 16 667 12575
Cerreto di Spoleto PG 17 1075 13650
Montegallo AP 18 523 14173
Sellano PG 18 1079 15252
Poggiodomo PG 18 117 15369
Montemonaco AP 20 604 15973

Municipalities with at least 50000 inhabitants

An earthquake occurred to
38 Km E of Foligno (57155 inhabitants)
47 Km NE of Terni (111501 inhabitants)
51 Km W of Teramo (54892 inhabitants)
55 Km NW of L'Aquila (69753 inhabitants)
68 Km E of Perugia (166134 inhabitants)
90 Km W of Montesilvano (53738 inhabitants)
94 Km E of Viterbo (67173 inhabitants)
95 Km NE of Guidonia Montecelio (88673 inhabitants)
96 Km SW of Ancona (100861 inhabitants)
97 Km N of Tivoli (56533 inhabitants)
97 Km W of Pescara (121014 inhabitants)
100 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
Reviewed
Rev100 		ML 1.1 2019-12-18
14:13:00		 42.8062 13.1192 10 2019-12-18
14:21:23		 Sala Sismica INGV-Roma 74766551
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-12-18 14:13:00 ± 0.05
Latitude 42.8062 ± 0.0027
Longitude 13.1192 ± 0.0074
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 74766551

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 563
Semi-minor axis of confidence ellipse (meter) 294
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 96
Circular confidence region, given by single value of horizontal uncertainty (meter) 560.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 126
Number of associated phases, regardless of their use for origin computation 15
Number of defining phases 14
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.14
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.30847
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 8
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.3
Num. used stations 10
Type of magnitude ML
Reference to an origin 74766551
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-12-18 14:21:23
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CSP1.EHZ. 2019-12-18T14:13:11.48 0.3 undecidable manual S 12 32.4453 50 0 72
IV.CESI.HNE. 2019-12-18T14:13:10.40 0.3 undecidable manual S 322 28.1496 50 0.07 72
IV.FDMO.HHZ. 2019-12-18T14:13:09.50 0.3 undecidable manual S 354 25.6521 50 -0.18 71
IV.LNSS.HHZ. 2019-12-18T14:13:09.14 0.3 undecidable manual S 196 23.4543 50 0.05 73
IV.MF5.EHZ. 2019-12-18T14:13:07.16 0.6 positive manual P 54 34.2435 50 0.17 47
IV.CESI.HNE. 2019-12-18T14:13:06.08 0.1 undecidable manual P 322 28.1496 50 0.03 97
IV.CSP1.EHZ. 2019-12-18T14:13:06.72 0.1 undecidable manual P 12 32.4453 50 0 97
IV.MC2.EHZ. 2019-12-18T14:13:06.13 0.3 undecidable manual S 26 12.9759 129 0.15 73
IV.FDMO.HHZ. 2019-12-18T14:13:05.62 0.3 positive manual P 354 25.6521 50 -0.06 73
IV.LNSS.HHZ. 2019-12-18T14:13:05.36 0.3 undecidable manual P 196 23.4543 50 0.02 73
IV.RCAV.EHZ. 2019-12-18T14:13:05.54 3.0 undecidable manual P 0.04 0
IV.MTRA.HNN. 2019-12-18T14:13:05.00 0.6 undecidable manual P 104 23.2545 50 -0.3 46
IV.MC2.EHZ. 2019-12-18T14:13:03.75 0.6 positive manual P 26 12.9759 129 0.21 48
IV.NRCA.HHZ. 2019-12-18T14:13:03.68 0.3 undecidable manual S 352 3.0969 164 -0.28 72
IV.NRCA.HHZ. 2019-12-18T14:13:02.46 0.1 undecidable manual P 352 3.0969 164 0.08 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHN. ML:1.5 0.00062 0.14 AML other m 2019-12-18T14:13:03.78
IV.NRCA.HNN. ML:1.5 0.0005389999999999999 0.12 AML other m 2019-12-18T14:13:03.78
IV.NRCA.HHE. ML:1.3 0.00034599999999999995 0.16 AML other m 2019-12-18T14:13:03.78
IV.NRCA.HNE. ML:1.3 0.00035499999999999996 0.14 AML other m 2019-12-18T14:13:03.79
IV.LNSS.HHE. ML:1.0 0.00006965 0.5 AML other m 2019-12-18T14:13:09.83
IV.LNSS.HHN. ML:1.2 0.0000895 0.74 AML other m 2019-12-18T14:13:09.58
IV.FDMO.HHE. ML:0.8 0.00003438344 0.16 AML other m 2019-12-18T14:13:09.81
IV.FDMO.HHN. ML:0.8 0.000032526397 0.3392 AML other m 2019-12-18T14:13:09.77
IV.CSP1.EHE. ML:0.8 0.000024251290000000002 1.6448 AML other m 2019-12-18T14:13:11.38
IV.CSP1.EHN. ML:1.2 0.000071425925 2.3744 AML other m 2019-12-18T14:13:12.83
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