Earthquake with magnitude of ML 0.4 on date 19-12-2020 and time 18:54:45 (Italy) in region 6 km NW Arquata del Tronto (AP)

A magnitude ML 0.4 earthquake occured in region: 6 km NW Arquata del Tronto (AP), on

  • 19-12-2020 17:54:45 (UTC)
  • 19-12-2020 18:54:45 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.8, 13.23 at 13 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
Montegallo AP 10 523 1701
Norcia PG 11 4957 6658
Castelsantangelo sul Nera MC 12 281 6939
Accumoli RI 12 667 7606
Montemonaco AP 13 604 8210
Acquasanta Terme AP 15 2916 11126
Ussita MC 18 444 11570
Preci PG 18 724 12294
Montefortino FM 18 1178 13472
Visso MC 18 1107 14579
Amatrice RI 20 2657 17236

Municipalities with at least 50000 inhabitants

An earthquake occurred to
42 Km W of Teramo (54892 inhabitants)
46 Km E of Foligno (57155 inhabitants)
52 Km N of L'Aquila (69753 inhabitants)
55 Km E of Terni (111501 inhabitants)
76 Km E of Perugia (166134 inhabitants)
82 Km W of Montesilvano (53738 inhabitants)
89 Km W of Pescara (121014 inhabitants)
92 Km NW of Chieti (51815 inhabitants)
94 Km S of Ancona (100861 inhabitants)
98 Km NE of Guidonia Montecelio (88673 inhabitants)
100 Km NE of Tivoli (56533 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 0.4 2020-12-19
17:54:45
42.8 13.23 13 2021-02-26
14:56:15
Bollettino Sismico Italiano INGV 86224891
Reviewed
Rev100
ML 0.6 2020-12-19
17:54:45
42.8 13.24 12 2020-12-19
18:05:02
Sala Sismica INGV-Roma 85552001
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-12-19 17:54:45 ± 0.04
Latitude 42.80 ± 0.00
Longitude 13.23 ± 0.00
Depth (km) 13 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 86224891

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 320
Semi-minor axis of confidence ellipse (meter) 102
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 72
Circular confidence region, given by single value of horizontal uncertainty (meter) 320
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 27
Number of defining phases 27
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.13
Epicentral distance of station closest to the epicenter (degree) 0.09083
Epicentral distance of station farthest from the epicenter (degree) 0.32735
Number of stations at which the event was observed 14
Number of stations from which data was used for origin computation 14
Magnitudes information

ML:0.4

Field Value
Value 0.4
Uncertainty 0.1
Num. used stations 7
Type of magnitude ML
Reference to an origin 86224891
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-01-13 12:18:53

ML:0.6

Field Value
Value 0.6
Uncertainty 0.4
Num. used stations 11
Type of magnitude ML
Reference to an origin 85552001
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-12-19 18:05:02
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.TERO.HHZ. 2020-12-19T17:54:57.00 0.3 undecidable manual S 123 0.3274 94 -0.24 69
IV.CSP1.EHE. 2020-12-19T17:54:56.21 0.3 undecidable manual S 356 0.2896 95 0.11 72
IV.GAVE.EHN. 2020-12-19T17:54:55.89 0.6 undecidable manual S 246 0.2707 95 0.32 46
IV.GUMA.HNN. 2020-12-19T17:54:55.84 0.6 undecidable manual S 16 0.2707 95 0.29 46
IV.FDMO.HHZ. 2020-12-19T17:54:54.97 0.3 undecidable manual S 336 0.2563 96 -0.15 71
IV.LNSS.HHZ. 2020-12-19T17:54:54.65 0.6 undecidable manual S 215 0.2446 96 -0.13 48
IV.FEMA.HNZ. 2020-12-19T17:54:53.49 0.6 undecidable manual S 320 0.2068 99 -0.2 47
IV.SMA1.EHZ. 2020-12-19T17:54:53.08 0.3 undecidable manual S 156 0.1889 101 -0.07 74
IV.T1299.EHZ. 2020-12-19T17:54:52.96 0.6 undecidable manual S 167 0.1727 103 0.27 47
IV.TERO.HHZ. 2020-12-19T17:54:52.37 0.3 undecidable manual P 123 0.3274 94 0.28 68
IV.CSP1.EHE. 2020-12-19T17:54:51.45 0.3 undecidable manual P 356 0.2896 95 0.01 73
IV.MMO1.EHZ. 2020-12-19T17:54:51.35 0.6 undecidable manual S 36 0.1187 118 0.16 49
IV.MC2.EHZ. 2020-12-19T17:54:51.14 0.3 undecidable manual S 344 0.1124 120 0.11 75
IV.GAVE.EHN. 2020-12-19T17:54:51.04 0.1 undecidable manual P 246 0.2707 95 -0.09 96
IV.MTRA.EHZ. 2020-12-19T17:54:51.36 0.3 undecidable manual S 111 0.1295 114 -0.12 73
IV.FDMO.HHZ. 2020-12-19T17:54:50.76 0.1 undecidable manual P 336 0.2563 96 -0.11 96
IV.NRCA.HHZ. 2020-12-19T17:54:50.37 0.3 undecidable manual S 290 0.0908 129 -0.13 73
IV.LNSS.HHZ. 2020-12-19T17:54:50.67 0.6 undecidable manual P 215 0.2446 96 0 49
IV.FEMA.HNZ. 2020-12-19T17:54:50.15 1.0 undecidable manual P 320 0.2068 99 0.11 24
IV.MF5.EHZ. 2020-12-19T17:54:50.65 0.6 undecidable manual P 42 0.2491 96 -0.1 48
IV.GUMA.HNN. 2020-12-19T17:54:50.91 0.6 undecidable manual P 16 0.2707 95 -0.2 47
IV.T1299.EHZ. 2020-12-19T17:54:49.51 0.1 undecidable manual P 167 0.1727 103 0.05 99
IV.SMA1.EHZ. 2020-12-19T17:54:49.78 0.1 undecidable manual P 156 0.1889 101 0.05 98
IV.MC2.EHZ. 2020-12-19T17:54:48.66 0.1 undecidable manual P 344 0.1124 120 0.16 98
IV.MTRA.EHZ. 2020-12-19T17:54:48.81 0.1 undecidable manual P 111 0.1295 114 0.04 100
IV.NRCA.HHZ. 2020-12-19T17:54:48.32 0.6 undecidable manual P 290 0.0908 129 0.12 50
IV.MMO1.EHZ. 2020-12-19T17:54:48.49 0.3 undecidable manual P 36 0.1187 118 -0.11 74
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HNN. ML:1.3 0.0002173146 0.0768 AML other m 2020-12-19T17:54:50.52
IV.NRCA.HHN. ML:1.4 0.0002440144 0.0768 AML other m 2020-12-19T17:54:50.48
IV.NRCA.HHE. ML:1.4 0.0002398651 0.0896 AML other m 2020-12-19T17:54:50.51
IV.NRCA.HNE. ML:1.3 0.00023528995 0.128 AML other m 2020-12-19T17:54:50.53
IV.MTRA.EHE. ML:0.5 3.170867E-5 0.1408 AML other m 2020-12-19T17:54:51.79
IV.MTRA.EHN. ML:0.4 2.12507E-5 0.2048 AML other m 2020-12-19T17:54:52.37
IV.SMA1.EHN. ML:0.2 1.0809922E-5 0.1792 AML other m 2020-12-19T17:54:53.37
IV.FDMO.HHE. ML:0.3 1.1614961E-5 0.2176 AML other m 2020-12-19T17:54:55.35
IV.FDMO.HHN. ML:0.3 1.0808163E-5 0.1408 AML other m 2020-12-19T17:54:55.58
IV.TERO.HHN. ML:0.6 1.44739975E-5 0.064 AML other m 2020-12-19T17:54:58.09
IV.TERO.HHE. ML:0.4 9.1532575E-6 0.128 AML other m 2020-12-19T17:54:58.66
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