Earthquake with magnitude of ML 1.2 on date 20-01-2021 and time 18:39:54 (UTC) in region 5 km W Arquata del Tronto (AP)

A magnitude ML 1.2 earthquake occured in region: 5 km W Arquata del Tronto (AP), on

  • 20-01-2021 18:39:54 (UTC)
  • 20-01-2021 19:39:54 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.7640, 13.2330 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 5 1178 1178
Accumoli RI 8 667 1845
Norcia PG 12 4957 6802
Montegallo AP 12 523 7325
Acquasanta Terme AP 15 2916 10241
Amatrice RI 16 2657 12898
Castelsantangelo sul Nera MC 16 281 13179
Montemonaco AP 17 604 13783
Cittareale RI 17 482 14265
Cascia PG 19 3217 17482

Municipalities with at least 50000 inhabitants

An earthquake occurred to
40 Km W of Teramo (54892 inhabitants)
48 Km N of L'Aquila (69753 inhabitants)
48 Km E of Foligno (57155 inhabitants)
53 Km E of Terni (111501 inhabitants)
79 Km E of Perugia (166134 inhabitants)
80 Km W of Montesilvano (53738 inhabitants)
87 Km W of Pescara (121014 inhabitants)
89 Km NW of Chieti (51815 inhabitants)
94 Km NE of Guidonia Montecelio (88673 inhabitants)
96 Km NE of Tivoli (56533 inhabitants)
98 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
Bulletin
Rev1000
ML 1.2 2021-01-20
18:39:54
42.7637 13.2328 11 2021-07-12
16:55:01
Bollettino Sismico Italiano INGV 87945461
Reviewed
Rev100
ML 1.2 2021-01-20
18:39:54
42.766 13.2378 11 2021-01-20
18:43:42
Sala Sismica INGV-Roma 86406481
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-01-20 18:39:54 ± 0.04
Latitude 42.7637 ± 0.0018
Longitude 13.2328 ± 0.0037
Depth (km) 11 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 87945461

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 324
Semi-minor axis of confidence ellipse (meter) 230
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) 320.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 57
Number of associated phases, regardless of their use for origin computation 29
Number of defining phases 29
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.18
Epicentral distance of station closest to the epicenter (degree) 0.11152
Epicentral distance of station farthest from the epicenter (degree) 0.38941
Number of stations at which the event was observed 15
Number of stations from which data was used for origin computation 15
Magnitudes information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.2
Num. used stations 18
Type of magnitude ML
Reference to an origin 86406481
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-01-20 18:43:42

ML:1.2

Field Value
Value 1.2
Uncertainty 0.2
Num. used stations 18
Type of magnitude ML
Reference to an origin 87945461
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-05-30 08:30:45
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CSP1.EHZ. 2021-01-20T18:40:06.38 0.6 undecidable manual S 356 36.4413 50 0.03 48
IV.CESI.HHZ. 2021-01-20T18:40:06.68 0.6 undecidable manual S 315 37.8288 50 -0.03 48
IV.MF5.EHZ. 2021-01-20T18:40:05.81 0.6 undecidable manual S 36 30.9468 50 0.93 37
IV.TERO.HHZ. 2021-01-20T18:40:05.31 0.6 undecidable manual S 117 34.0437 50 -0.4 45
IV.FDMO.HHZ. 2021-01-20T18:40:05.11 0.6 undecidable manual S 339 32.5452 50 -0.18 47
IV.RM33.EHZ. 2021-01-20T18:40:04.17 0.6 undecidable manual S 183 28.2495 50 0 49
IV.GAVE.EHZ. 2021-01-20T18:40:04.20 0.6 undecidable manual S 254 28.749 50 -0.08 48
IV.LNSS.HHZ. 2021-01-20T18:40:03.11 0.6 undecidable manual S 221 23.754 50 0.15 48
IV.ARRO.EHZ. 2021-01-20T18:40:02.35 0.3 undecidable manual P 242 43.2234 50 0.13 70
IV.CESI.HHZ. 2021-01-20T18:40:01.29 0.3 undecidable manual P 315 37.8288 50 -0.09 71
IV.MC2.EHZ. 2021-01-20T18:40:01.08 0.3 undecidable manual S 348 16.7721 123 0.04 75
IV.CSP1.EHZ. 2021-01-20T18:40:01.10 0.1 undecidable manual P 356 36.4413 50 -0.08 96
IV.FDMO.HHZ. 2021-01-20T18:40:00.36 0.1 undecidable manual P 339 32.5452 50 -0.21 94
IV.MMO1.EHZ. 2021-01-20T18:40:00.91 0.6 undecidable manual S 27 16.872 123 -0.16 49
IV.MF5.EHZ. 2021-01-20T18:40:00.59 0.1 undecidable manual P 36 30.9468 50 0.26 93
IV.TERO.HHZ. 2021-01-20T18:40:00.66 0.1 undecidable manual P 117 34.0437 50 -0.15 95
IV.T1299.HNN. 2021-01-20T18:40:00.78 0.6 undecidable manual S 164 14.874 126 0.27 48
IV.SMA1.EHZ. 2021-01-20T18:40:00.94 0.6 undecidable manual S 150 16.9719 123 -0.16 49
IV.MTRA.HNZ. 2021-01-20T18:39:59.80 0.3 undecidable manual S 93 13.3755 129 -0.28 72
IV.LNSS.HHZ. 2021-01-20T18:39:59.18 0.1 undecidable manual P 221 23.754 50 -0.04 98
IV.RM33.EHZ. 2021-01-20T18:39:59.82 0.1 undecidable manual P 183 28.2495 50 -0.1 97
IV.NRCA.HNZ. 2021-01-20T18:39:59.63 0.6 undecidable manual S 309 12.3765 131 -0.19 49
IV.GAVE.EHZ. 2021-01-20T18:39:59.94 0.3 undecidable manual P 254 28.749 50 -0.05 73
IV.T1299.HNN. 2021-01-20T18:39:58.06 0.1 undecidable manual P 164 14.874 126 0.26 96
IV.SMA1.EHZ. 2021-01-20T18:39:58.17 0.1 undecidable manual P 150 16.9719 123 0.03 100
IV.MMO1.EHZ. 2021-01-20T18:39:58.08 0.1 undecidable manual P 27 16.872 123 -0.05 99
IV.MC2.EHZ. 2021-01-20T18:39:58.18 0.1 undecidable manual P 348 16.7721 123 0.07 99
IV.NRCA.HNZ. 2021-01-20T18:39:57.47 0.1 negative manual P 309 12.3765 131 0.06 100
IV.MTRA.HNZ. 2021-01-20T18:39:57.61 0.1 undecidable manual P 93 13.3755 129 0.05 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHE. ML:1.8 0.000615 0.18 AML other m 2021-01-20T18:39:59.69
IV.NRCA.HHN. ML:1.6 0.0004525 0.12 AML other m 2021-01-20T18:39:59.69
IV.MTRA.EHE. ML:1.4 0.000272 0.34 AML other m 2021-01-20T18:40:00.23
IV.MTRA.EHN. ML:1.4 0.000255 0.3 AML other m 2021-01-20T18:40:00.51
IV.SMA1.EHE. ML:1.0 0.0000921 1.12 AML other m 2021-01-20T18:40:01.23
IV.SMA1.EHN. ML:0.9 0.00007085 0.9 AML other m 2021-01-20T18:40:01.37
IV.LNSS.HHE. ML:1.2 0.00010270000000000002 0.88 AML other m 2021-01-20T18:40:04.59
IV.RM33.EHN. ML:1.2 0.00007294999999999998 0.74 AML other m 2021-01-20T18:40:04.33
IV.FDMO.HHN. ML:0.9 0.00003555 0.92 AML other m 2021-01-20T18:40:05.82
IV.FDMO.HHE. ML:0.9 0.00003545 0.24 AML other m 2021-01-20T18:40:05.37
IV.LNSS.HHN. ML:1.1 0.00007395000000000001 0.64 AML other m 2021-01-20T18:40:05.69
IV.TERO.HHN. ML:1.2 0.00007205 0.3 AML other m 2021-01-20T18:40:05.80
IV.RM33.EHE. ML:1.2 0.00008285000000000001 1.04 AML other m 2021-01-20T18:40:05.81
IV.CESI.HHN. ML:1.3 0.0000724 1.62 AML other m 2021-01-20T18:40:06.94
IV.CESI.HHE. ML:1.2 0.0000537 1.04 AML other m 2021-01-20T18:40:07.92
IV.CSP1.EHN. ML:1.6 0.0001449 0.52 AML other m 2021-01-20T18:40:07.91
IV.CSP1.EHE. ML:1.3 0.00007364999999999999 1.22 AML other m 2021-01-20T18:40:07.75
IV.TERO.HHE. ML:1.1 0.0000494 1.54 AML other m 2021-01-20T18:40:07.03
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