Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.3 on date 31-03-2021 and time 05:05:09 (Italy) in region 4 km NE Barete (AQ)

A magnitude ML 1.3 earthquake occured in region: 4 km NE Barete (AQ), on

  • 31-03-2021 03:05:09 (UTC)
  • 31-03-2021 05:05:09 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.4830, 13.3140 at 14 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
Barete AQ 4 737 737
Capitignano AQ 4 665 1402
Pizzoli AQ 5 4326 5728
Montereale AQ 7 2581 8309
Cagnano Amiterno AQ 8 1369 9678
Campotosto AQ 10 542 10220
Scoppito AQ 13 3727 13947
Borbona RI 15 617 14564
Crognaleto TE 15 1297 15861
L'Aquila AQ 16 69753 85614
Amatrice RI 17 2657 88271
Posta RI 18 694 88965
Cittareale RI 20 482 89447
Fano Adriano TE 20 296 89743

Municipalities with at least 50000 inhabitants

An earthquake occurred to
16 Km NW of L'Aquila (69753 inhabitants)
38 Km SW of Teramo (54892 inhabitants)
55 Km E of Terni (111501 inhabitants)
69 Km W of Montesilvano (53738 inhabitants)
72 Km NE of Tivoli (56533 inhabitants)
72 Km W of Chieti (51815 inhabitants)
72 Km NE of Guidonia Montecelio (88673 inhabitants)
73 Km SE of Foligno (57155 inhabitants)
74 Km W of Pescara (121014 inhabitants)
95 Km NE of Roma (2864731 inhabitants)
99 Km NE of Velletri (53303 inhabitants)
99 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 1.3 2021-03-31
03:05:09		 42.4827 13.3145 14 2021-07-12
16:55:11		 Bollettino Sismico Italiano INGV 90235461
Reviewed
Rev100 		ML 1.2 2021-03-31
03:05:09		 42.4918 13.3168 13 2021-03-31
03:21:05		 Sala Sismica INGV-Roma 88629821
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-03-31 03:05:09 ± 0.09
Latitude 42.4827 ± 0.0045
Longitude 13.3145 ± 0.0073
Depth (km) 14 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 90235461

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 580
Semi-minor axis of confidence ellipse (meter) 293
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 54
Circular confidence region, given by single value of horizontal uncertainty (meter) 580.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 137
Number of associated phases, regardless of their use for origin computation 26
Number of defining phases 26
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.2
Epicentral distance of station closest to the epicenter (degree) 0.07824
Epicentral distance of station farthest from the epicenter (degree) 0.61424
Number of stations at which the event was observed 13
Number of stations from which data was used for origin computation 13
Magnitudes information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.2
Num. used stations 12
Type of magnitude ML
Reference to an origin 88629821
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-03-31 03:21:05

ML:1.3

Field Value
Value 1.3
Uncertainty 0.2
Num. used stations 12
Type of magnitude ML
Reference to an origin 90235461
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-05-18 16:05:30
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CSP1.EHZ. 2021-03-31T03:05:31.11 0.6 undecidable manual S 353 68.1762 93 0.66 38
IV.FDMO.HHZ. 2021-03-31T03:05:29.91 0.6 undecidable manual S 343 64.1913 94 0.53 41
IV.MMO1.EHZ. 2021-03-31T03:05:24.78 0.3 undecidable manual S 1 46.2204 96 0.17 68
IV.NRCA.HHZ. 2021-03-31T03:05:23.50 0.3 undecidable manual S 337 42.2244 96 -0.04 70
IV.FAGN.HHZ. 2021-03-31T03:05:21.54 0.6 undecidable manual S 137 32.6451 99 0.53 42
IV.CSP1.EHZ. 2021-03-31T03:05:21.53 0.1 undecidable manual P 353 68.1762 93 -0.18 87
IV.FDMO.HHZ. 2021-03-31T03:05:20.90 0.3 undecidable manual P 343 64.1913 94 -0.19 66
IV.TERO.HHZ. 2021-03-31T03:05:19.57 0.6 undecidable manual S 57 28.3494 102 -0.3 47
IV.LNSS.HHZ. 2021-03-31T03:05:19.10 0.6 undecidable manual S 301 26.0517 103 -0.19 46
IV.MMO1.EHZ. 2021-03-31T03:05:18.13 0.1 undecidable manual P 1 46.2204 96 -0.21 90
IV.T1299.HNZ. 2021-03-31T03:05:17.10 0.3 undecidable manual S 351 17.0718 116 0.09 73
IV.GIGS.HJZ. 2021-03-31T03:05:17.75 0.3 undecidable manual S 99 21.3675 109 -0.34 70
IV.NRCA.HHZ. 2021-03-31T03:05:17.48 0.1 undecidable manual P 337 42.2244 96 -0.24 90
IV.SMA1.EHZ. 2021-03-31T03:05:16.98 0.6 undecidable manual S 6 16.4724 118 0.1 48
IV.FAGN.HHZ. 2021-03-31T03:05:16.49 0.3 undecidable manual P 137 32.6451 99 0.23 69
MN.AQU.HNZ. 2021-03-31T03:05:16.79 0.6 undecidable manual S 153 16.0728 119 0.01 50
IV.RM33.EHZ. 2021-03-31T03:05:15.18 0.3 undecidable manual S 290 8.6802 141 -0.08 73
IV.LNSS.HHZ. 2021-03-31T03:05:15.25 0.1 negative manual P 301 26.0517 103 -0.02 96
IV.CAMP.HHZ. 2021-03-31T03:05:15.47 0.3 undecidable manual S 53 9.6792 137 0.03 74
IV.TERO.HHZ. 2021-03-31T03:05:15.41 0.1 undecidable manual P 57 28.3494 102 -0.19 95
IV.T1299.HNZ. 2021-03-31T03:05:14.08 0.1 undecidable manual P 351 17.0718 116 0.13 97
IV.GIGS.HJZ. 2021-03-31T03:05:14.38 0.1 undecidable manual P 99 21.3675 109 -0.19 96
IV.SMA1.EHZ. 2021-03-31T03:05:14.04 0.1 undecidable manual P 6 16.4724 118 0.16 96
MN.AQU.HNZ. 2021-03-31T03:05:13.92 0.3 undecidable manual P 153 16.0728 119 0.1 73
IV.RM33.EHZ. 2021-03-31T03:05:13.02 0.1 negative manual P 290 8.6802 141 0.08 100
IV.CAMP.HHZ. 2021-03-31T03:05:13.19 0.3 undecidable manual P 53 9.6792 137 0.15 73
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.RM33.EHN. ML:1.0 0.00009905 0.26 AML other m 2021-03-31T03:05:15.24
IV.RM33.EHE. ML:0.9 0.00008855 1.18 AML other m 2021-03-31T03:05:16.60
IV.SMA1.EHN. ML:1.6 0.0002945 0.4 AML other m 2021-03-31T03:05:17.80
IV.SMA1.EHE. ML:1.4 0.000211 1.4 AML other m 2021-03-31T03:05:17.01
IV.LNSS.HHN. ML:1.3 0.0000972 0.18 AML other m 2021-03-31T03:05:19.44
IV.TERO.HHN. ML:1.2 0.00008465 0.96 AML other m 2021-03-31T03:05:19.22
IV.TERO.HHE. ML:1.2 0.000082 1.42 AML other m 2021-03-31T03:05:19.16
IV.LNSS.HHE. ML:1.3 0.00011199999999999998 0.2 AML other m 2021-03-31T03:05:20.70
IV.NRCA.HHN. ML:1.3 0.00006525 0.16 AML other m 2021-03-31T03:05:23.60
IV.NRCA.HHE. ML:1.5 0.0000903 1.48 AML other m 2021-03-31T03:05:24.16
IV.FAGN.HHN. ML:1.1 0.0000553 0.2 AML other m 2021-03-31T03:05:25.48
IV.FAGN.HHE. ML:1.2 0.00007015 0.78 AML other m 2021-03-31T03:05:26.79
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