Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.2 on date 21-01-2021 and time 05:00:18 (Italy) in region 1 km NW Barete (AQ)

A magnitude ML 1.2 earthquake occured in region: 1 km NW Barete (AQ), on

  • 21-01-2021 04:00:18 (UTC)
  • 21-01-2021 05:00:18 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.46, 13.27 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
Barete AQ 1 737 737
Pizzoli AQ 3 4326 5063
Cagnano Amiterno AQ 4 1369 6432
Capitignano AQ 7 665 7097
Montereale AQ 7 2581 9678
Scoppito AQ 10 3727 13405
Borbona RI 13 617 14022
Campotosto AQ 13 542 14564
L'Aquila AQ 16 69753 84317
Posta RI 16 694 85011
Antrodoco RI 17 2588 87599
Micigliano RI 18 127 87726
Borgo Velino RI 19 972 88698
Amatrice RI 19 2657 91355
Tornimparte AQ 19 3187 94542
Crognaleto TE 20 1297 95839
Lucoli AQ 20 1011 96850
Cittareale RI 20 482 97332

Municipalities with at least 50000 inhabitants

An earthquake occurred to
16 Km NW of L'Aquila (69753 inhabitants)
42 Km SW of Teramo (54892 inhabitants)
53 Km E of Terni (111501 inhabitants)
68 Km NE of Tivoli (56533 inhabitants)
68 Km NE of Guidonia Montecelio (88673 inhabitants)
72 Km SE of Foligno (57155 inhabitants)
72 Km W of Montesilvano (53738 inhabitants)
75 Km W of Chieti (51815 inhabitants)
77 Km W of Pescara (121014 inhabitants)
91 Km NE of Roma (2864731 inhabitants)
95 Km NE of Velletri (53303 inhabitants)
96 Km E of Viterbo (67173 inhabitants)
Recent and historical Seismicity
Seismic hazard
Shakemap
Felt maps
The earthquake effects in MCS scale as obtained from the compiled questionnaire

The earthquake effects in MCS scale as obtained from the compiled questionnaire

This map shows the distribution of the effects of the earthquake on the territory in terms of the MCS (Mercalli-Cancani-Sieberg) intensity scale. The intensities are determined using the data provided in the questionnaire (http://www.haisentitoilterremoto.it/) that are analysed using robust statistical techniques since they are not verified individually. Specifically, the assignment of MCS intensities greater or equal the VI degree of the MCS scale require opportune in situ verification by professional experts. The purple start shows the epicenter. This map is prepared every so often that the population fill in new questionnaires. The number of questionnaires used to determine the map and the date and time of the last adjournment are shown in the upper right part of the panel.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100 		ML 1.2 2021-01-21
04:00:18		 42.46 13.27 11 2021-01-21
04:07:24		 Sala Sismica INGV-Roma 86419841
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-01-21 04:00:18 ± 0.15
Latitude 42.46 ± 0.01
Longitude 13.27 ± 0.01
Depth (km) 11 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 86419841

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1248
Semi-minor axis of confidence ellipse (meter) 580
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 235
Circular confidence region, given by single value of horizontal uncertainty (meter) 1250
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 99
Number of associated phases, regardless of their use for origin computation 19
Number of defining phases 16
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.34
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.77072
Number of stations at which the event was observed 11
Number of stations from which data was used for origin computation 10
Magnitude information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 86419841
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-01-21 04:07:24
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.CSP1.EHZ. 2021-01-21T04:00:41.08 0.6 undecidable manual S -3.56 0
IV.T0110.HHZ. 2021-01-21T04:00:34.90 3.0 undecidable manual S 122 0.438 50 1.36 0
IV.NRCA.HHZ. 2021-01-21T04:00:32.32 0.3 undecidable manual S 343 0.3903 50 0.19 70
IV.FAGN.HHZ. 2021-01-21T04:00:30.31 0.3 undecidable manual S 130 0.3013 50 0.82 58
IV.TERO.HHZ. 2021-01-21T04:00:28.61 0.6 undecidable manual S 56 0.2923 50 -0.62 42
IV.LNSS.HHZ. 2021-01-21T04:00:27.32 0.6 undecidable manual S 310 0.2221 50 0.16 48
IV.T0110.HHZ. 2021-01-21T04:00:26.53 0.1 undecidable manual P 122 0.438 50 -0.49 86
IV.SMA1.EHZ. 2021-01-21T04:00:26.19 0.3 undecidable manual S 15 0.1754 50 0.43 69
IV.MCI.EHZ. 2021-01-21T04:00:26.39 3.0 positive manual P 1.04 0
IV.FIAM.HHZ. 2021-01-21T04:00:26.70 1.0 undecidable manual S 211 0.2248 50 -0.52 22
IV.NRCA.HHZ. 2021-01-21T04:00:25.97 0.1 undecidable manual P 343 0.3903 50 -0.23 92
IV.TERO.HHZ. 2021-01-21T04:00:24.07 0.6 positive manual P 56 0.2923 50 -0.46 45
IV.FAGN.HHZ. 2021-01-21T04:00:24.87 0.1 undecidable manual P 130 0.3013 50 0.19 94
IV.LNSS.HHZ. 2021-01-21T04:00:23.20 0.1 undecidable manual P 310 0.2221 50 -0.13 97
IV.SMA1.EHZ. 2021-01-21T04:00:22.54 1.0 undecidable manual P 15 0.1754 50 0.01 25
IV.RM33.EHZ. 2021-01-21T04:00:22.76 0.6 undecidable manual S 318 0.0648 147 0.08 51
IT.RMVT.HGZ. 2021-01-21T04:00:22.35 0.1 undecidable manual P 0.7707 -9.99 0
IV.FIAM.HHZ. 2021-01-21T04:00:21.80 3.0 undecidable manual P 211 0.2248 50 -1.57 0
IV.RM33.EHZ. 2021-01-21T04:00:20.88 0.1 positive manual P 318 0.0648 147 0.13 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.RM33.EHE. ML:1 0.000152 1.5 AML other m 2021-01-21T04:00:22.11
IV.RM33.HNE. ML:1.2 0.000209 1.52 AML other m 2021-01-21T04:00:22.10
IV.RM33.EHN. ML:1.2 0.0002245 0.26 AML other m 2021-01-21T04:00:22.98
IV.RM33.HNN. ML:1.2 0.0002325 0.28 AML other m 2021-01-21T04:00:22.99
IV.SMA1.EHN. ML:1.6 0.0003295 0.32 AML other m 2021-01-21T04:00:26.51
IV.SMA1.EHE. ML:1.7 0.0003945 0.26 AML other m 2021-01-21T04:00:26.54
IV.LNSS.HHN. ML:1 6.57E-5 0.82 AML other m 2021-01-21T04:00:27.66
IV.LNSS.HHE. ML:1 6.12E-5 0.58 AML other m 2021-01-21T04:00:29.73
IV.NRCA.HHN. ML:1.2 4.65E-5 0.42 AML other m 2021-01-21T04:00:32.15
IV.NRCA.HHE. ML:1.2 4.655E-5 0.1 AML other m 2021-01-21T04:00:32.66
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