Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.9 on date 24-12-2019 and time 16:28:25 (Italy) in region 7 km E Norcia (PG)

A magnitude ML 0.9 earthquake occured in region: 7 km E Norcia (PG), on

  • 24-12-2019 15:28:25 (UTC)
  • 24-12-2019 16:28:25 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.7900, 13.1780 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 7 4957 4957
Arquata del Tronto AP 10 1178 6135
Castelsantangelo sul Nera MC 12 281 6416
Accumoli RI 12 667 7083
Montegallo AP 14 523 7606
Preci PG 15 724 8330
Cascia PG 16 3217 11547
Montemonaco AP 17 604 12151
Visso MC 17 1107 13258
Ussita MC 18 444 13702
Acquasanta Terme AP 19 2916 16618
Cittareale RI 19 482 17100
Amatrice RI 20 2657 19757

Municipalities with at least 50000 inhabitants

An earthquake occurred to
43 Km E of Foligno (57155 inhabitants)
45 Km W of Teramo (54892 inhabitants)
50 Km NE of Terni (111501 inhabitants)
52 Km NW of L'Aquila (69753 inhabitants)
73 Km E of Perugia (166134 inhabitants)
85 Km W of Montesilvano (53738 inhabitants)
92 Km W of Pescara (121014 inhabitants)
95 Km NW of Chieti (51815 inhabitants)
95 Km NE of Guidonia Montecelio (88673 inhabitants)
96 Km S of Ancona (100861 inhabitants)
97 Km NE of Tivoli (56533 inhabitants)
97 Km E of Viterbo (67173 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 0.9 2019-12-24
15:28:25		 42.7902 13.1785 10 2020-02-28
16:42:22		 Bollettino Sismico Italiano INGV 76164861
Reviewed
Rev100 		ML 0.3 2019-12-24
15:28:26		 42.7847 13.2013 2 2019-12-24
16:19:51		 Sala Sismica INGV-Roma 74943571
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-12-24 15:28:25 ± 0.21
Latitude 42.7902 ± 0.0036
Longitude 13.1785 ± 0.0061
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 76164861

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 476
Semi-minor axis of confidence ellipse (meter) 315
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) 480.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 104
Number of associated phases, regardless of their use for origin computation 30
Number of defining phases 14
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.21
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.21314
Number of stations at which the event was observed 23
Number of stations from which data was used for origin computation 7
Magnitudes information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.3
Num. used stations 6
Type of magnitude ML
Reference to an origin 76164861
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-02-03 13:16:08

ML:0.3

Field Value
Value 0.3
Uncertainty 0.1
Num. used stations 2
Type of magnitude ML
Reference to an origin 74943571
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-12-24 16:19:51
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
RF.GEPF.HHZ. 2019-12-24T15:29:59.99 3.0 undecidable manual Sg 15.61 0
AC.VLO.HHZ. 2019-12-24T15:29:57.56 3.0 positive manual Pg 15.41 0
IV.FVI.HHZ. 2019-12-24T15:29:55.16 3.0 undecidable manual Sn 5.29 0
IV.PZUN.HHZ. 2019-12-24T15:29:51.45 3.0 undecidable manual Sn -5.18 0
OT.OT14.EHZ. 2019-12-24T15:29:50.46 3.0 undecidable manual Sg 6.5 0
IV.PAOL.HHZ. 2019-12-24T15:29:24.97 3.0 undecidable manual Sn -7.72 0
IT.VNF1.HGZ. 2019-12-24T15:29:17.70 3.0 undecidable manual Sg -0.7 0
IV.LPEL.HHZ. 2019-12-24T15:29:14.82 3.0 undecidable manual Sg 1.48 0
IV.SENA.HHZ. 2019-12-24T15:28:55.81 3.0 undecidable manual Pg 4.5 0
IV.BRSN.EHZ. 2019-12-24T15:28:52.47 3.0 undecidable manual Sg 0.01 0
IV.GATE.HHZ. 2019-12-24T15:28:50.41 3.0 negative manual Pn -2.58 0
IV.SARZ.HHZ. 2019-12-24T15:28:48.68 3.0 positive manual Pn 1.32 0
IV.MCI.EHZ. 2019-12-24T15:28:48.84 3.0 positive manual Pg 5.02 0
IV.EUCT.HNZ. 2019-12-24T15:28:46.19 3.0 negative manual Pn -3.32 0
GU.GRAM.HHZ. 2019-12-24T15:28:37.07 3.0 negative manual Pn 0.74 0
IV.LNSS.HNZ. 2019-12-24T15:28:34.48 0.6 undecidable manual S 209 23.6541 112 -0.16 47
IV.T1299.HNN. 2019-12-24T15:28:33.54 0.6 undecidable manual S 154 19.2696 116 0.28 46
IV.SMA1.EHZ. 2019-12-24T15:28:33.87 0.6 undecidable manual S 144 21.867 114 -0.2 47
IV.MMO1.EHZ. 2019-12-24T15:28:32.56 0.1 undecidable manual S 45 17.0718 119 -0.03 98
IV.MTRA.EHE. 2019-12-24T15:28:32.86 0.6 undecidable manual S 102 18.1707 118 -0.05 49
IV.MC2.EHZ. 2019-12-24T15:28:31.77 0.3 undecidable manual S 4 13.4754 125 0.24 71
IV.LNSS.HNZ. 2019-12-24T15:28:30.82 0.3 undecidable manual P 209 23.6541 112 -0.08 72
IV.T1299.HNN. 2019-12-24T15:28:30.63 0.1 undecidable manual P 154 19.2696 116 0.53 87
IV.SMA1.EHZ. 2019-12-24T15:28:30.38 0.1 undecidable manual P 144 21.867 114 -0.19 94
IV.MC2.EHZ. 2019-12-24T15:28:29.12 0.3 undecidable manual P 4 13.4754 125 0.02 74
IV.MMO1.EHZ. 2019-12-24T15:28:29.65 0.1 undecidable manual P 45 17.0718 119 -0.07 97
IV.NRCA.HHZ. 2019-12-24T15:28:29.84 0.1 undecidable manual S 313 7.0929 143 -0.09 98
IV.MTRA.EHE. 2019-12-24T15:28:29.73 0.1 undecidable manual P 102 18.1707 118 -0.17 95
IV.NRCA.HHZ. 2019-12-24T15:28:28.19 0.1 undecidable manual P 313 7.0929 143 0.01 100
IT.FIE.HGZ. 2019-12-24T15:28:21.73 3.0 undecidable manual P -0.29 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHN. ML:1.1 0.00018496833499999997 0.0512 AML other m 2019-12-24T15:28:29.89
IV.NRCA.HHE. ML:1.0 0.00015858455 1.9232 AML other m 2019-12-24T15:28:30.98
IV.NRCA.HNE. ML:1.0 0.000164502135 1.9232 AML other m 2019-12-24T15:28:30.02
IV.NRCA.HNN. ML:1.2 0.00023407763 1.5648 AML other m 2019-12-24T15:28:30.11
IV.SMA1.EHN. ML:0.3 0.000017316244499999997 0.0896 AML other m 2019-12-24T15:28:34.18
IV.SMA1.EHE. ML:0.5 0.000019929404999999996 0.4736 AML other m 2019-12-24T15:28:34.49
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