Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.9 on date 31-03-2021 and time 07:55:42 (Italy) in region 4 km NE Barete (AQ)

A magnitude ML 1.9 earthquake occured in region: 4 km NE Barete (AQ), on

  • 31-03-2021 05:55:42 (UTC)
  • 31-03-2021 07:55:42 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.4760, 13.3130 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
Pizzoli AQ 5 4326 5063
Capitignano AQ 5 665 5728
Cagnano Amiterno AQ 7 1369 7097
Montereale AQ 8 2581 9678
Campotosto AQ 10 542 10220
Scoppito AQ 12 3727 13947
Borbona RI 15 617 14564
L'Aquila AQ 16 69753 84317
Crognaleto TE 16 1297 85614
Amatrice RI 17 2657 88271
Posta RI 19 694 88965

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)
71 Km NE of Tivoli (56533 inhabitants)
72 Km NE of Guidonia Montecelio (88673 inhabitants)
72 Km W of Chieti (51815 inhabitants)
73 Km SE of Foligno (57155 inhabitants)
74 Km W of Pescara (121014 inhabitants)
94 Km NE of Roma (2864731 inhabitants)
98 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 1.9 2021-03-31
05:55:42		 42.4757 13.3127 14 2021-07-12
16:55:10		 Bollettino Sismico Italiano INGV 90016061
Reviewed
Rev100 		ML 1.9 2021-03-31
05:55:42		 42.4912 13.3128 15 2021-03-31
06:08:26		 Sala Sismica INGV-Roma 88632361
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-03-31 05:55:42 ± 0.08
Latitude 42.4757 ± 0.0036
Longitude 13.3127 ± 0.0061
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 90016061

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 492
Semi-minor axis of confidence ellipse (meter) 142
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 237
Circular confidence region, given by single value of horizontal uncertainty (meter) 490.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 80
Number of associated phases, regardless of their use for origin computation 57
Number of defining phases 39
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.27
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.63672
Number of stations at which the event was observed 42
Number of stations from which data was used for origin computation 24
Magnitudes information

ML:1.9

Field Value
Value 1.9
Uncertainty 0.3
Num. used stations 56
Type of magnitude ML
Reference to an origin 90016061
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-05-18 16:21:48

ML:1.9

Field Value
Value 1.9
Uncertainty 0.3
Num. used stations 40
Type of magnitude ML
Reference to an origin 88632361
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-03-31 06:08:26
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.SELL.HHZ. 2021-03-31T05:57:32.92 3.0 undecidable manual Sn -4.25 0
GU.EQUI.HHZ. 2021-03-31T05:57:05.03 3.0 undecidable manual Sn 2.36 0
AC.VLO.HHZ. 2021-03-31T05:56:56.84 3.0 positive manual Pn -0.57 0
IV.VOBA.EHZ. 2021-03-31T05:56:54.32 3.0 positive manual Pg 14.42 0
IV.AGLI.HHZ. 2021-03-31T05:56:45.79 3.0 positive manual Pg 11.33 0
IV.BRSN.HNZ. 2021-03-31T05:56:44.88 3.0 undecidable manual Sg 2.7 0
MN.TRI.HHZ. 2021-03-31T05:56:42.88 3.0 positive manual Pg 10.02 0
IV.CTI.HHZ. 2021-03-31T05:56:40.79 3.0 undecidable manual Pn 0.79 0
IT.FIE.HGZ. 2021-03-31T05:56:39.53 3.0 undecidable manual Sn -1.89 0
IV.FERS.HNZ. 2021-03-31T05:56:30.18 3.0 negative manual Pg 4.17 0
IV.PTRJ.HNZ. 2021-03-31T05:56:26.04 3.0 undecidable manual S -1.03 0
IV.LATB.EHZ. 2021-03-31T05:56:15.74 3.0 undecidable manual S -1.2 0
IV.CERA.HHZ. 2021-03-31T05:56:14.65 3.0 undecidable manual S -2.36 0
IV.PE3.EHZ. 2021-03-31T05:56:09.46 3.0 positive manual P 2.49 0
IT.GLNS.HNZ. 2021-03-31T05:56:09.45 3.0 undecidable manual P 3.45 0
IV.VAGA.HHZ. 2021-03-31T05:56:08.74 3.0 undecidable manual P 3.56 0
IV.LPEL.HHZ. 2021-03-31T05:56:08.44 3.0 undecidable manual S -1.12 0
IV.FDMO.HHZ. 2021-03-31T05:56:03.11 0.6 undecidable manual S 344 64.8906 93 0.44 42
IV.MF5.EHZ. 2021-03-31T05:56:01.96 0.6 undecidable manual S 12 58.0974 94 1.1 32
IV.MC2.EHZ. 2021-03-31T05:55:59.08 0.3 undecidable manual S 348 49.4172 94 0.53 63
IV.EL6.EHZ. 2021-03-31T05:55:59.08 3.0 negative manual P -0.91 0
IV.MMO1.EHZ. 2021-03-31T05:55:57.96 0.3 undecidable manual S 1 47.0196 95 0.04 70
IV.NRCA.HHZ. 2021-03-31T05:55:56.64 0.3 undecidable manual S 338 42.8238 95 -0.18 69
IV.MOMA.HHZ. 2021-03-31T05:55:56.08 0.3 undecidable manual P 301 70.6737 93 0.88 53
IV.MNTT.EHZ. 2021-03-31T05:55:55.61 0.3 undecidable manual P 19 68.9754 93 0.66 57
IV.CESI.HHZ. 2021-03-31T05:55:54.51 0.3 undecidable manual P 331 67.4769 93 -0.2 66
IV.GUMA.HHZ. 2021-03-31T05:55:54.58 0.3 undecidable manual P 2 65.1903 93 0.23 65
IV.FDMO.HHZ. 2021-03-31T05:55:54.00 0.1 positive manual P 344 64.8906 93 -0.31 86
IV.CSP1.EHZ. 2021-03-31T05:55:54.68 0.1 undecidable manual P 353 68.8755 93 -0.25 86
IV.MTRA.EHZ. 2021-03-31T05:55:53.46 0.3 undecidable manual S 12 31.9458 99 -0.45 66
IV.MF5.EHZ. 2021-03-31T05:55:53.44 0.1 undecidable manual P 12 58.0974 94 0.18 89
IV.TERO.HHZ. 2021-03-31T05:55:52.66 0.3 undecidable manual S 55 28.8489 100 -0.45 67
IV.PTQR.HHZ. 2021-03-31T05:55:52.08 0.6 undecidable manual P 172 50.8158 94 -0.08 46
IV.FIAM.HHZ. 2021-03-31T05:55:52.73 0.3 undecidable manual S 215 28.0497 101 -0.17 71
IV.LNSS.HHZ. 2021-03-31T05:55:52.04 0.3 undecidable manual S 302 26.3514 102 -0.41 67
IV.VCEL.EHZ. 2021-03-31T05:55:51.33 0.3 undecidable manual P 102 44.1225 95 0.2 68
IV.MC2.EHZ. 2021-03-31T05:55:51.78 0.1 positive manual P 348 49.4172 94 -0.15 92
IV.MMO1.EHZ. 2021-03-31T05:55:51.29 0.1 positive manual P 1 47.0196 95 -0.28 90
IV.T0110.HHZ. 2021-03-31T05:55:51.54 0.3 undecidable manual P 126 46.8198 95 0 71
IV.NRCA.HHZ. 2021-03-31T05:55:50.66 0.1 positive manual P 338 42.8238 95 -0.27 90
IV.SMA1.EHZ. 2021-03-31T05:55:50.28 0.3 undecidable manual S 6 17.2716 114 0.14 73
IV.GIGS.HHN. 2021-03-31T05:55:50.96 0.3 undecidable manual S 97 21.4674 107 -0.22 71
IV.T1299.HNN. 2021-03-31T05:55:50.24 0.3 undecidable manual S 352 17.7711 113 -0.02 74
MN.AQU.HNN. 2021-03-31T05:55:49.95 0.3 undecidable manual S 151 15.4734 118 0.24 72
IV.FAGN.HHZ. 2021-03-31T05:55:49.72 0.3 undecidable manual P 136 32.2455 98 0.43 66
IV.RM33.EHZ. 2021-03-31T05:55:48.25 0.3 undecidable manual S 295 8.7801 139 -0.07 74
IV.LNSS.HHZ. 2021-03-31T05:55:48.38 0.1 negative manual P 302 26.3514 102 -0.03 97
IV.CAMP.HHZ. 2021-03-31T05:55:48.59 0.3 undecidable manual S 50 10.2786 134 0 75
IV.MTRA.EHZ. 2021-03-31T05:55:48.91 0.1 positive manual P 12 31.9458 99 -0.34 91
IV.TERO.HHZ. 2021-03-31T05:55:48.54 0.1 positive manual P 55 28.8489 100 -0.25 93
IV.FIAM.HHZ. 2021-03-31T05:55:48.71 0.3 undecidable manual P 215 28.0497 101 0.04 73
IV.SMA1.EHZ. 2021-03-31T05:55:47.13 0.1 positive manual P 6 17.2716 114 0.06 99
IV.T1299.HNN. 2021-03-31T05:55:47.24 0.1 positive manual P 352 17.7711 113 0.1 98
IV.GIGS.HHN. 2021-03-31T05:55:47.56 0.1 positive manual P 97 21.4674 107 -0.12 97
MN.AQU.HNN. 2021-03-31T05:55:46.83 0.3 undecidable manual P 151 15.4734 118 0.01 75
IV.RM33.EHZ. 2021-03-31T05:55:46.12 0.1 negative manual P 295 8.7801 139 0.1 100
IV.CAMP.HHZ. 2021-03-31T05:55:46.30 0.1 positive manual P 50 10.2786 134 0.12 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.RM33.EHE. ML:1.8 0.00067722445 0.1792 AML other m 2021-03-31T05:55:48.50
IV.RM33.HNE. ML:1.7 0.00049853815 0.1088 AML other m 2021-03-31T05:55:48.50
IV.RM33.HNN. ML:1.9 0.0008514888999999999 0.16 AML other m 2021-03-31T05:55:48.39
IV.RM33.EHN. ML:1.9 0.0008112865 0.16 AML other m 2021-03-31T05:55:48.39
IV.CAMP.HHN. ML:1.8 0.0006365 0.36 AML other m 2021-03-31T05:55:48.97
IV.CAMP.HHE. ML:1.6 0.00039105045 0.32 AML other m 2021-03-31T05:55:48.85
IV.SMA1.EHN. ML:2.1 0.0010286382999999998 0.1984 AML other m 2021-03-31T05:55:51.11
IV.SMA1.EHE. ML:2.3 0.00138378945 0.1792 AML other m 2021-03-31T05:55:51.13
IV.LNSS.HNN. ML:2.0 0.0005155 0.18 AML other m 2021-03-31T05:55:52.67
IV.LNSS.HHN. ML:2.0 0.00053965885 0.1792 AML other m 2021-03-31T05:55:52.58
IV.TERO.HNN. ML:1.9 0.0003946636 0.1792 AML other m 2021-03-31T05:55:52.88
IV.TERO.HHE. ML:1.9 0.0003559978 0.1184 AML other m 2021-03-31T05:55:53.00
IV.TERO.HNE. ML:2.0 0.00048127989999999997 0.128 AML other m 2021-03-31T05:55:53.07
IV.FIAM.HNN. ML:1.6 0.00021936450000000003 0.56 AML other m 2021-03-31T05:55:53.11
IV.FIAM.HHN. ML:1.3 0.0000909 0.52 AML other m 2021-03-31T05:55:53.37
IV.TERO.HHN. ML:2.0 0.0004545 0.12 AML other m 2021-03-31T05:55:53.29
IV.MTRA.EHE. ML:2.1 0.00059650515 0.0992 AML other m 2021-03-31T05:55:53.56
IV.MTRA.HNE. ML:2.1 0.0005910692999999999 0.0992 AML other m 2021-03-31T05:55:53.56
IV.MTRA.EHN. ML:2.2 0.0006592268 0.1024 AML other m 2021-03-31T05:55:53.62
IV.MTRA.HNN. ML:2.2 0.00065331745 0.112 AML other m 2021-03-31T05:55:53.62
IV.LNSS.HNE. ML:2.1 0.0007110618 0.2112 AML other m 2021-03-31T05:55:53.73
IV.LNSS.HHE. ML:2.2 0.00075631245 0.2016 AML other m 2021-03-31T05:55:53.74
IV.MOMA.HHN. ML:1.4 0.0000465 0.06 AML other m 2021-03-31T05:55:55.95
IV.NRCA.HHN. ML:2.0 0.00034236825 0.16 AML other m 2021-03-31T05:55:56.82
IV.NRCA.HNN. ML:2.0 0.00031682005 0.1792 AML other m 2021-03-31T05:55:56.74
IV.FIAM.HHE. ML:1.2 0.00008345 0.4 AML other m 2021-03-31T05:55:57.56
IV.NRCA.HHE. ML:2.2 0.0005574999999999999 0.12 AML other m 2021-03-31T05:55:57.91
IV.NRCA.HNE. ML:2.2 0.0005274216 0.1216 AML other m 2021-03-31T05:55:57.91
IV.FAGN.HHE. ML:1.8 0.0002595 0.52 AML other m 2021-03-31T05:55:59.39
IV.FIAM.HNE. ML:2.5 0.0014179664999999998 0.8608 AML other m 2021-03-31T05:55:59.90
IV.T0110.HHN. ML:1.6 0.0001045 0.24 AML other m 2021-03-31T05:56:00.48
IV.FAGN.HHN. ML:1.8 0.00027049999999999996 0.26 AML other m 2021-03-31T05:56:00.68
IV.VCEL.EHN. ML:1.7 0.00014629999999999998 0.52 AML other m 2021-03-31T05:56:01.38
IV.VCEL.EHE. ML:1.7 0.000152707825 0.3776 AML other m 2021-03-31T05:56:02.49
IV.T0110.HHE. ML:1.6 0.00010408787999999999 0.3808 AML other m 2021-03-31T05:56:03.04
IV.MOMA.HNN. ML:1.9 0.00012997092999999997 0.9088 AML other m 2021-03-31T05:56:03.18
IV.CESI.HHN. ML:1.6 0.000070016785 0.1984 AML other m 2021-03-31T05:56:04.42
IV.GUMA.HHE. ML:2.0 0.0001595838 0.3616 AML other m 2021-03-31T05:56:04.42
IV.GUMA.HHN. ML:2.0 0.000161 0.3 AML other m 2021-03-31T05:56:04.64
IV.FDMO.HHN. ML:1.5 0.000052973795000000004 0.2592 AML other m 2021-03-31T05:56:04.83
IV.FDMO.HHE. ML:1.4 0.000050440554999999996 0.1376 AML other m 2021-03-31T05:56:05.35
IV.CSP1.EHN. ML:2.0 0.00014967206000000003 0.16 AML other m 2021-03-31T05:56:05.44
IV.CSP1.EHE. ML:1.9 0.00012293538500000002 0.24 AML other m 2021-03-31T05:56:05.71
IV.CESI.HHE. ML:1.4 0.000040044825 0.0992 AML other m 2021-03-31T05:56:05.98
IV.MF5.EHE. ML:1.6 0.00007435270999999999 0.3584 AML other m 2021-03-31T05:56:06.88
IV.GUMA.HNE. ML:2.0 0.00017064325 0.3712 AML other m 2021-03-31T05:56:06.89
IV.MOMA.HHE. ML:1.6 0.0000586 0.18 AML other m 2021-03-31T05:56:07.41
IV.MNTT.EHN. ML:1.9 0.00013177355 0.24 AML other m 2021-03-31T05:56:07.56
IV.MNTT.EHE. ML:2.0 0.0001745807 0.24 AML other m 2021-03-31T05:56:08.29
IV.MF5.EHN. ML:1.4 0.000060477535 0.4832 AML other m 2021-03-31T05:56:09.02
IV.CESI.HNE. ML:1.9 0.0001405871 1.0624 AML other m 2021-03-31T05:56:11.58
IV.EL6.EHE. ML:1.7 0.00005135345 0.2816 AML other m 2021-03-31T05:56:13.85
IV.GUMA.HNN. ML:2.6 0.0007671471000000001 2.0096 AML other m 2021-03-31T05:56:15.32
IV.MOMA.HNE. ML:1.9 0.00013577820000000001 1.0176 AML other m 2021-03-31T05:56:15.95
IV.EL6.EHN. ML:1.6 0.00004660337 0.3584 AML other m 2021-03-31T05:56:20.13
IV.CESI.HNN. ML:2.0 0.0001672497 0.88 AML other m 2021-03-31T05:56:21.61
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