Earthquake with magnitude of ML 1.3 on date 20-12-2019 and time 03:55:57 (UTC) in region 6 km W Arquata del Tronto (AP)

A magnitude ML 1.3 earthquake occured in region: 6 km W Arquata del Tronto (AP), on

  • 20-12-2019 03:55:57 (UTC)
  • 20-12-2019 04:55:57 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.77, 13.23 at 11 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.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Arquata del Tronto AP 6 1178 1178
Accumoli RI 8 667 1845
Norcia PG 11 4957 6802
Montegallo AP 12 523 7325
Acquasanta Terme AP 15 2916 10241
Castelsantangelo sul Nera MC 15 281 10522
Amatrice RI 16 2657 13179
Montemonaco AP 17 604 13783
Cittareale RI 18 482 14265
Cascia PG 18 3217 17482
Preci PG 20 724 18206

Municipalities with at least 50000 inhabitants

An earthquake occurred to
41 Km W of Teramo (54892 inhabitants)
48 Km E of Foligno (57155 inhabitants)
49 Km N of L'Aquila (69753 inhabitants)
53 Km E of Terni (111501 inhabitants)
78 Km E of Perugia (166134 inhabitants)
81 Km W of Montesilvano (53738 inhabitants)
88 Km W of Pescara (121014 inhabitants)
90 Km NW of Chieti (51815 inhabitants)
95 Km NE of Guidonia Montecelio (88673 inhabitants)
96 Km NE of Tivoli (56533 inhabitants)
97 Km S of Ancona (100861 inhabitants)
100 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
Rev 1000 ML 1.3 2019-12-20
03:55:57
42.77 13.23 11 2020-02-28
16:42:25
Bollettino Sismico Italiano INGV 76480431
Rev 100 ML 1.3 2019-12-20
03:55:57
42.77 13.23 12 2019-12-20
04:03:05
Sala Sismica INGV-Roma 74807581
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-12-20 03:55:57 ± 0.03
Latitude 42.77 ± 0.00
Longitude 13.23 ± 0.00
Depth (km) 11 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 76480431

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 900
Semi-minor axis of confidence ellipse (meter) 260
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 325
Circular confidence region, given by single value of horizontal uncertainty (meter) 260
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 58
Number of associated phases, regardless of their use for origin computation 31
Number of defining phases 31
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.16
Epicentral distance of station closest to the epicenter (degree) 0.10522
Epicentral distance of station farthest from the epicenter (degree) 0.40559
Number of stations at which the event was observed 17
Number of stations from which data was used for origin computation 17
Magnitudes information

ML:1.3

Field Value
Value 1.3
Uncertainty 0.2
Num. used stations 16
Type of magnitude ML
Reference to an origin 76480431
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-02-13 09:24:33

ML:1.3

Field Value
Value 1.3
Uncertainty 0.2
Num. used stations 16
Type of magnitude ML
Reference to an origin 74807581
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-12-20 04:03:05
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.CESI.HHZ. 2019-12-20T03:56:09.92 0.6 undecidable manual S 315 0.3336 90 0.1 47
IV.TERO.HHZ. 2019-12-20T03:56:09.03 0.6 undecidable manual S 118 0.3121 90 -0.16 46
IV.FDMO.HHZ. 2019-12-20T03:56:08.27 0.6 undecidable manual S 339 0.2851 90 -0.12 47
IV.CAMP.HHZ. 2019-12-20T03:56:07.67 0.3 undecidable manual S 150 0.2689 90 -0.24 69
IV.RM33.EHZ. 2019-12-20T03:56:07.82 0.1 undecidable manual S 182 0.2617 90 0.14 95
IV.GAVE.EHZ. 2019-12-20T03:56:07.47 0.1 undecidable manual S 252 0.2581 90 -0.1 96
IV.LNSS.HNZ. 2019-12-20T03:56:06.44 0.3 undecidable manual S 220 0.2176 90 0.07 72
IV.FEMA.HNZ. 2019-12-20T03:56:06.60 0.3 undecidable manual S 326 0.232 90 -0.21 70
IV.GIGS.HHZ. 2019-12-20T03:56:05.63 0.3 undecidable manual P 141 0.4056 90 -0.2 68
IV.T1299.HNZ. 2019-12-20T03:56:04.33 0.1 undecidable manual S 164 0.1412 90 0.2 96
IV.TERO.HHZ. 2019-12-20T03:56:04.09 0.1 undecidable manual P 118 0.3121 90 -0.15 93
IV.SMA1.EHZ. 2019-12-20T03:56:04.52 0.1 undecidable manual S 151 0.1601 90 -0.16 96
IV.CSP1.EHZ. 2019-12-20T03:56:04.40 0.3 undecidable manual P 357 0.322 90 0 72
IV.MMO1.EHZ. 2019-12-20T03:56:04.12 0.1 undecidable manual S 29 0.1475 90 -0.18 95
IV.MC2.EHZ. 2019-12-20T03:56:04.34 0.1 undecidable manual S 348 0.1439 90 0.14 97
IV.CESI.HHZ. 2019-12-20T03:56:04.56 0.3 undecidable manual P 315 0.3336 90 -0.04 71
IV.FEMA.HNZ. 2019-12-20T03:56:03.08 0.3 undecidable manual P 326 0.232 90 0.21 70
IV.FDMO.HHZ. 2019-12-20T03:56:03.57 0.1 undecidable manual P 339 0.2851 90 -0.21 93
IV.MTRA.EHZ. 2019-12-20T03:56:03.91 0.3 undecidable manual S 96 0.1241 91 0.31 71
IV.CAMP.HHZ. 2019-12-20T03:56:03.32 0.3 undecidable manual P 150 0.2689 90 -0.18 70
IV.MF5.EHZ. 2019-12-20T03:56:03.96 0.1 undecidable manual P 38 0.2752 90 0.36 91
IV.RM33.EHZ. 2019-12-20T03:56:03.39 0.1 undecidable manual P 182 0.2617 90 0.02 97
IV.GAVE.EHZ. 2019-12-20T03:56:03.45 0.1 undecidable manual P 252 0.2581 90 0.14 94
IV.NRCA.HHZ. 2019-12-20T03:56:02.81 0.1 undecidable manual S 307 0.1052 110 -0.25 96
IV.LNSS.HNZ. 2019-12-20T03:56:02.70 0.3 undecidable manual P 220 0.2176 90 0.09 72
IV.MC2.EHZ. 2019-12-20T03:56:01.42 0.1 undecidable manual P 348 0.1439 90 0.06 99
IV.T1299.HNZ. 2019-12-20T03:56:01.50 0.1 undecidable manual P 164 0.1412 90 0.18 96
IV.MTRA.EHZ. 2019-12-20T03:56:01.01 0.1 undecidable manual P 96 0.1241 91 0 99
IV.SMA1.EHZ. 2019-12-20T03:56:01.64 0.1 positive manual P 151 0.1601 90 0 99
IV.MMO1.EHZ. 2019-12-20T03:56:01.39 0.1 positive manual P 29 0.1475 90 -0.03 98
IV.NRCA.HHZ. 2019-12-20T03:56:00.72 0.1 undecidable manual P 307 0.1052 110 0.02 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HNN. ML:1.5 0.0003519748 1.872 AML other m 2019-12-20T03:56:02.98
IV.NRCA.HHN. ML:1.6 0.00039204785 1.8592 AML other m 2019-12-20T03:56:02.98
IV.NRCA.HNE. ML:1.6 0.00041470125 1.92 AML other m 2019-12-20T03:56:03.99
IV.NRCA.HHE. ML:1.6 0.0004447603 1.92 AML other m 2019-12-20T03:56:03.99
IV.MTRA.EHE. ML:1.2 0.0001556561 0.1984 AML other m 2019-12-20T03:56:04.68
IV.SMA1.EHE. ML:1.2 0.00012452399 0.0992 AML other m 2019-12-20T03:56:04.78
IV.SMA1.EHN. ML:1.1 9.7141545E-5 0.1024 AML other m 2019-12-20T03:56:05.14
IV.GAVE.HNE. ML:1.4 0.0001244726 0.3392 AML other m 2019-12-20T03:56:07.82
IV.RM33.EHN. ML:0.9 3.8353935E-5 1.7632 AML other m 2019-12-20T03:56:08.05
IV.GAVE.EHN. ML:1.4 0.00011440665 0.24 AML other m 2019-12-20T03:56:08.34
IV.FDMO.HHE. ML:0.8 3.085501E-5 0.1376 AML other m 2019-12-20T03:56:08.87
IV.FDMO.HHN. ML:1 4.389474E-5 1.8016 AML other m 2019-12-20T03:56:09.06
IV.TERO.HHE. ML:1 4.472162E-5 0.0608 AML other m 2019-12-20T03:56:09.48
IV.TERO.HHN. ML:1.1 5.6160145E-5 0.0992 AML other m 2019-12-20T03:56:09.68
IV.CESI.HHE. ML:1.2 6.641305E-5 1.7792 AML other m 2019-12-20T03:56:09.07
IV.CESI.HHN. ML:1.3 7.120741E-5 0.1984 AML other m 2019-12-20T03:56:10.17
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download