Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.3 on date 23-12-2020 and time 07:01:28 (Italy) in region 4 km NW Preci (PG)

A magnitude ML 1.3 earthquake occured in region: 4 km NW Preci (PG), on

  • 23-12-2020 06:01:28 (UTC)
  • 23-12-2020 07:01:28 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.9050, 13.0050 at 11 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
Preci PG 4 724 724
Sellano PG 7 1079 1803
Visso MC 8 1107 2910
Monte Cavallo MC 10 145 3055
Ussita MC 12 444 3499
Cerreto di Spoleto PG 12 1075 4574
Castelsantangelo sul Nera MC 12 281 4855
Norcia PG 14 4957 9812
Pieve Torina MC 16 1458 11270
Fiordimonte MC 16 202 11472
Pievebovigliana MC 19 866 12338
Vallo di Nera PG 19 364 12702
Fiastra MC 19 559 13261
Serravalle di Chienti MC 19 1070 14331
Acquacanina MC 20 121 14452
Muccia MC 20 915 15367

Municipalities with at least 50000 inhabitants

An earthquake occurred to
25 Km E of Foligno (57155 inhabitants)
48 Km NE of Terni (111501 inhabitants)
55 Km E of Perugia (166134 inhabitants)
63 Km W of Teramo (54892 inhabitants)
69 Km NW of L'Aquila (69753 inhabitants)
90 Km SW of Ancona (100861 inhabitants)
91 Km NE 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
Reviewed
Rev100 		ML 1.3 2020-12-23
06:01:28		 42.9047 13.0052 11 2020-12-23
06:05:49		 Sala Sismica INGV-Roma 85642791
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-12-23 06:01:28 ± 0.05
Latitude 42.9047 ± 0.0027
Longitude 13.0052 ± 0.0049
Depth (km) 11 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 85642791

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 351
Semi-minor axis of confidence ellipse (meter) 320
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 76
Circular confidence region, given by single value of horizontal uncertainty (meter) 350.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 69
Number of associated phases, regardless of their use for origin computation 17
Number of defining phases 17
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.15
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.28868
Number of stations at which the event was observed 10
Number of stations from which data was used for origin computation 10
Magnitude information

ML:1.3

Field Value
Value 1.3
Uncertainty 0.2
Num. used stations 24
Type of magnitude ML
Reference to an origin 85642791
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-12-23 06:05:49
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ASSB.HHZ. 2020-12-23T06:01:38.88 0.6 undecidable manual S 299 32.0457 50 -0.25 46
IV.CSP1.EHZ. 2020-12-23T06:01:37.62 0.3 undecidable manual S 38 26.3514 50 0 74
IV.GAVE.EHZ. 2020-12-23T06:01:37.20 0.3 undecidable manual S 201 25.2525 50 -0.13 72
IV.EL6.EHZ. 2020-12-23T06:01:36.95 0.6 negative manual P -0.1 0.74
IV.MOMA.HHZ. 2020-12-23T06:01:35.82 0.6 negative manual P 0.4 0.74
IV.CESI.HHZ. 2020-12-23T06:01:34.20 0.6 undecidable manual S 324 13.7751 128 0.02 50
IV.MC2.EHZ. 2020-12-23T06:01:34.67 0.6 undecidable manual S 87 14.9739 126 0.17 48
IV.ASSB.HHZ. 2020-12-23T06:01:34.32 0.3 negative manual P 299 32.0457 50 -0.14 71
IV.FDMO.HHZ. 2020-12-23T06:01:34.61 0.6 undecidable manual S 24 16.0728 124 -0.21 48
IV.GAVE.EHZ. 2020-12-23T06:01:33.44 0.3 positive manual P 201 25.2525 50 0.02 74
IV.CSP1.EHZ. 2020-12-23T06:01:33.47 0.6 negative manual P 38 26.3514 50 -0.12 48
IV.MMO1.EHZ. 2020-12-23T06:01:33.73 0.6 negative manual P 0.2 0.74
IV.NRCA.HHZ. 2020-12-23T06:01:33.44 0.3 undecidable manual S 132 11.877 133 -0.23 72
IV.NRCA.HHZ. 2020-12-23T06:01:31.35 0.1 negative manual P 132 11.877 133 0.04 100
IV.CESI.HHZ. 2020-12-23T06:01:31.71 0.1 negative manual P 324 13.7751 128 0.1 98
IV.MC2.EHZ. 2020-12-23T06:01:31.96 1.0 negative manual P 87 14.9739 126 0.17 24
IV.FDMO.HHZ. 2020-12-23T06:01:31.97 0.1 positive manual P 24 16.0728 124 0 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHE. ML:1.3 0.0002180779 0.08 AML other m 2020-12-23T06:01:33.79
IV.NRCA.HHN. ML:1.5 0.0003177532 0.1024 AML other m 2020-12-23T06:01:33.59
IV.NRCA.HNE. ML:1.3 0.0002003101 0.08 AML other m 2020-12-23T06:01:33.80
IV.NRCA.HNN. ML:1.4 0.00031180925 0.64 AML other m 2020-12-23T06:01:33.55
IV.CESI.HHE. ML:0.8 0.000057584910000000006 0.4992 AML other m 2020-12-23T06:01:34.73
IV.CESI.HHN. ML:1.0 0.000092592955 0.2176 AML other m 2020-12-23T06:01:34.49
IV.CESI.HNE. ML:1.2 0.0001728433 2.2784 AML other m 2020-12-23T06:01:33.56
IV.CESI.HNN. ML:1.3 0.00019851035 1.1488 AML other m 2020-12-23T06:01:38.08
IV.FDMO.HHE. ML:1.4 0.0002020662 0.1216 AML other m 2020-12-23T06:01:35.04
IV.FDMO.HHN. ML:1.4 0.0002231177 0.2016 AML other m 2020-12-23T06:01:34.84
IV.GAVE.EHE. ML:1.5 0.00018608374999999999 0.1824 AML other m 2020-12-23T06:01:37.47
IV.GAVE.EHN. ML:1.3 0.00010799405000000001 0.4992 AML other m 2020-12-23T06:01:37.98
IV.GAVE.HNE. ML:1.5 0.000191776 0.192 AML other m 2020-12-23T06:01:37.56
IV.GAVE.HNN. ML:1.5 0.0001637958 0.9088 AML other m 2020-12-23T06:01:32.48
IV.CSP1.EHE. ML:1.1 0.000067783455 0.2208 AML other m 2020-12-23T06:01:38.14
IV.CSP1.EHN. ML:1.2 0.000079686094 0.2816 AML other m 2020-12-23T06:01:39.14
IV.ASSB.HHE. ML:1.0 0.000052253305 0.08 AML other m 2020-12-23T06:01:40.43
IV.ASSB.HHN. ML:1.0 0.000042286974999999995 0.2592 AML other m 2020-12-23T06:01:39.33
IV.MOMA.HHE. ML:1.1 0.000044566485 0.4608 AML other m 2020-12-23T06:01:45.63
IV.MOMA.HHN. ML:1.2 0.00005334215 0.24 AML other m 2020-12-23T06:01:45.36
IV.MOMA.HNE. ML:1.5 0.000119393145 0.8992 AML other m 2020-12-23T06:01:51.08
IV.MOMA.HNN. ML:1.6 0.00016355810000000002 1.52 AML other m 2020-12-23T06:01:53.24
IV.EL6.EHE. ML:1.3 0.00005836915 0.4 AML other m 2020-12-23T06:01:44.22
IV.EL6.EHN. ML:1.4 0.00007389706 0.24 AML other m 2020-12-23T06:01:44.86
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