Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.1 on date 26-12-2019 and time 19:21:26 (Italy) in region 3 km NE Norcia (PG)

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

  • 26-12-2019 18:21:26 (UTC)
  • 26-12-2019 19:21:26 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.8090, 13.1180 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
Ussita MC 15 444 10730
Arquata del Tronto AP 15 1178 11908
Cerreto di Spoleto PG 16 1075 12983
Accumoli RI 17 667 13650
Sellano PG 18 1079 14729
Montegallo AP 18 523 15252
Poggiodomo PG 18 117 15369
Montemonaco AP 20 604 15973

Municipalities with at least 50000 inhabitants

An earthquake occurred to
37 Km E of Foligno (57155 inhabitants)
47 Km NE of Terni (111501 inhabitants)
51 Km W of Teramo (54892 inhabitants)
56 Km NW of L'Aquila (69753 inhabitants)
68 Km E of Perugia (166134 inhabitants)
91 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)
98 Km W of Pescara (121014 inhabitants)
98 Km N of Tivoli (56533 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 2019-12-26
18:21:26		 42.8093 13.1177 10 2019-12-26
18:32:45		 Sala Sismica INGV-Roma 75000971
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-12-26 18:21:26 ± 0.07
Latitude 42.8093 ± 0.0036
Longitude 13.1177 ± 0.0061
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 75000971

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 503
Semi-minor axis of confidence ellipse (meter) 306
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 87
Circular confidence region, given by single value of horizontal uncertainty (meter) 500.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 74
Number of associated phases, regardless of their use for origin computation 22
Number of defining phases 18
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.19
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.40200
Number of stations at which the event was observed 16
Number of stations from which data was used for origin computation 12
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.4
Num. used stations 12
Type of magnitude ML
Reference to an origin 75000971
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-12-26 18:32:45
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
GU.CARD.HHZ. 2019-12-26T18:22:50.35 3.0 undecidable manual Sg 12.18 0
IV.SPS2.HHZ. 2019-12-26T18:22:05.39 3.0 positive manual Pn -0.99 0
IV.COLB.HHZ. 2019-12-26T18:21:38.32 3.0 positive manual P 1.1 0
IV.CSP1.EHZ. 2019-12-26T18:21:37.19 0.6 undecidable manual S 13 32.1456 50 -0.19 47
IV.CESI.HHZ. 2019-12-26T18:21:35.91 0.6 undecidable manual S 321 27.75 50 -0.31 46
IV.FDMO.HHZ. 2019-12-26T18:21:35.29 0.6 undecidable manual S 354 25.3524 111 -0.19 47
IV.LNSS.HHZ. 2019-12-26T18:21:34.51 0.6 undecidable manual S 195 23.754 112 -0.47 44
IV.MOMA.HHE. 2019-12-26T18:21:34.93 0.1 undecidable manual P 269 44.622 50 0.41 87
IV.MMO1.EHZ. 2019-12-26T18:21:33.77 0.6 undecidable manual S 60 19.6692 116 0.08 49
IV.CSP1.EHZ. 2019-12-26T18:21:32.44 1.0 negative manual P 13 32.1456 50 -0.16 23
IV.T1299.EHE. 2019-12-26T18:21:31.27 0.1 undecidable manual P 145 23.6541 113 0.09 97
IV.CESI.HHZ. 2019-12-26T18:21:31.82 1.0 negative manual P 321 27.75 50 -0.1 24
IV.FDMO.HHZ. 2019-12-26T18:21:31.31 0.3 undecidable manual P 354 25.3524 111 -0.19 71
IV.MTRA.EHN. 2019-12-26T18:21:31.09 0.1 undecidable manual P 104 23.4543 113 -0.06 97
IV.SMA1.EHZ. 2019-12-26T18:21:31.87 0.1 undecidable manual P 138 26.6511 110 0.12 95
IT.MTCL.HGZ. 2019-12-26T18:21:31.22 0.1 undecidable manual P 335 22.5552 113 0.22 94
IV.MMO1.EHZ. 2019-12-26T18:21:30.22 1.0 undecidable manual P 60 19.6692 116 -0.25 23
IV.LNSS.HHZ. 2019-12-26T18:21:30.91 0.6 undecidable manual P 195 23.754 112 -0.31 46
IV.MC2.EHZ. 2019-12-26T18:21:29.49 0.6 positive manual P 27 12.6762 128 0.22 48
IV.NRCA.HNZ. 2019-12-26T18:21:29.51 0.6 undecidable manual S 354 2.6973 165 -0.08 50
IV.NRCA.HNZ. 2019-12-26T18:21:28.19 0.1 negative manual P 354 2.6973 165 0.09 100
IT.VNF1.HGZ. 2019-12-26T18:21:25.17 3.0 undecidable manual P -1.09 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHE. ML:1.5 0.0006873080000000001 0.064 AML other m 2019-12-26T18:21:29.56
IV.NRCA.HHN. ML:1.6 0.0007776575 0.0896 AML other m 2019-12-26T18:21:29.50
IV.NRCA.HNE. ML:1.5 0.00061292485 0.0768 AML other m 2019-12-26T18:21:29.55
IV.NRCA.HNN. ML:1.6 0.0007325315999999999 0.0896 AML other m 2019-12-26T18:21:29.50
IV.FDMO.HHE. ML:0.6 0.000024755519999999995 0.1536 AML other m 2019-12-26T18:21:36.34
IV.FDMO.HHN. ML:0.6 0.000024055995 0.1792 AML other m 2019-12-26T18:21:35.65
IV.CESI.HNE. ML:1.1 0.000063307955 1.1008 AML other m 2019-12-26T18:21:36.40
IV.CESI.HNN. ML:1.4 0.00015208365000000002 1.4976 AML other m 2019-12-26T18:21:36.15
IV.CESI.HHE. ML:0.8 0.000028746510000000004 0.0896 AML other m 2019-12-26T18:21:36.06
IV.CESI.HHN. ML:0.8 0.00003563831 0.0768 AML other m 2019-12-26T18:21:36.06
IV.CSP1.EHE. ML:0.9 0.000034887219999999995 1.3184 AML other m 2019-12-26T18:21:37.97
IV.CSP1.EHN. ML:0.9 0.000036608929999999996 0.9984 AML other m 2019-12-26T18:21:37.53
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