Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.1 on date 14-03-2021 and time 01:05:18 (UTC) in region 5 km NW Arquata del Tronto (AP)

A magnitude ML 1.1 earthquake occured in region: 5 km NW Arquata del Tronto (AP), on

  • 14-03-2021 01:05:18 (UTC)
  • 14-03-2021 02:05:18 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.8070, 13.2650 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
Arquata del Tronto AP 5 1178 1178
Montegallo AP 7 523 1701
Montemonaco AP 12 604 2305
Accumoli RI 12 667 2972
Acquasanta Terme AP 13 2916 5888
Castelsantangelo sul Nera MC 13 281 6169
Norcia PG 14 4957 11126
Montefortino FM 17 1178 12304
Roccafluvione AP 18 2010 14314
Ussita MC 19 444 14758
Palmiano AP 19 196 14954
Amatrice RI 20 2657 17611
Visso MC 20 1107 18718

Municipalities with at least 50000 inhabitants

An earthquake occurred to
40 Km W of Teramo (54892 inhabitants)
49 Km E of Foligno (57155 inhabitants)
52 Km N of L'Aquila (69753 inhabitants)
57 Km E of Terni (111501 inhabitants)
79 Km E of Perugia (166134 inhabitants)
79 Km W of Montesilvano (53738 inhabitants)
87 Km W of Pescara (121014 inhabitants)
90 Km NW of Chieti (51815 inhabitants)
93 Km S of Ancona (100861 inhabitants)
100 Km NE of Guidonia Montecelio (88673 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 1.1 2021-03-14
01:05:18		 42.8068 13.2648 11 2021-07-12
16:55:09		 Bollettino Sismico Italiano INGV 89601081
Reviewed
Rev100 		ML 1.1 2021-03-14
01:05:18		 42.7582 13.2998 1 2021-03-14
01:22:03		 Sala Sismica INGV-Roma 88099071
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-03-14 01:05:18 ± 0.05
Latitude 42.8068 ± 0.0027
Longitude 13.2648 ± 0.0061
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 89601081

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 454
Semi-minor axis of confidence ellipse (meter) 116
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 278
Circular confidence region, given by single value of horizontal uncertainty (meter) 450.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 121
Number of associated phases, regardless of their use for origin computation 16
Number of defining phases 15
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) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.35163
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 8
Magnitudes information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.0
Num. used stations 2
Type of magnitude ML
Reference to an origin 88099071
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-03-14 01:22:03

ML:1.1

Field Value
Value 1.1
Uncertainty 0.0
Num. used stations 2
Type of magnitude ML
Reference to an origin 89601081
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-04-29 16:40:49
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.VVLD.HHZ. 2021-03-14T01:05:56.90 3.0 undecidable manual S -0.62 0
IV.LNSS.HNZ. 2021-03-14T01:05:29.08 0.6 undecidable manual S 219 29.0487 50 0.22 47
IV.MF5.EHZ. 2021-03-14T01:05:28.15 0.6 undecidable manual S 38 25.5522 50 0.23 47
IV.MNTT.EHZ. 2021-03-14T01:05:26.24 0.3 undecidable manual P 43 39.0276 50 0.23 69
IV.SMA1.EHN. 2021-03-14T01:05:26.39 0.6 undecidable manual S 164 20.3685 117 -0.06 49
IV.T1299.HNN. 2021-03-14T01:05:26.54 0.6 undecidable manual S 176 19.1697 119 0.45 45
IV.MC2.EHZ. 2021-03-14T01:05:24.49 0.6 undecidable manual S 332 13.1757 129 0.16 49
IV.LNSS.HNZ. 2021-03-14T01:05:24.23 0.3 undecidable manual P 219 29.0487 50 -0.25 70
IV.NRCA.HHZ. 2021-03-14T01:05:24.23 0.6 undecidable manual S 284 12.5763 130 0.04 50
IV.MMO1.EHZ. 2021-03-14T01:05:23.92 0.3 undecidable manual S 26 11.4774 132 0.04 75
IV.MF5.EHZ. 2021-03-14T01:05:23.75 0.1 undecidable manual P 38 25.5522 50 -0.19 95
IV.SMA1.EHN. 2021-03-14T01:05:22.92 0.1 undecidable manual P 164 20.3685 117 -0.17 96
IV.T1299.HNN. 2021-03-14T01:05:22.89 0.1 undecidable manual P 176 19.1697 119 0.01 99
IV.MMO1.EHZ. 2021-03-14T01:05:21.52 0.1 undecidable manual P 26 11.4774 132 -0.09 99
IV.NRCA.HHZ. 2021-03-14T01:05:21.75 0.1 positive manual P 284 12.5763 130 -0.04 100
IV.MC2.EHZ. 2021-03-14T01:05:21.84 0.1 undecidable manual P 332 13.1757 129 -0.03 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHE. ML:1.1 0.000142 0.12 AML other m 2021-03-14T01:05:24.72
IV.NRCA.HHN. ML:1.1 0.000123 0.72 AML other m 2021-03-14T01:05:24.43
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