Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.5 on date 28-07-2021 and time 17:56:24 (UTC) in region 1 km E Barete (AQ)

A magnitude ML 1.5 earthquake occured in region: 1 km E Barete (AQ), on

  • 28-07-2021 17:56:24 (UTC)
  • 28-07-2021 19:56:24 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.4510, 13.2930 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 1 737 737
Pizzoli AQ 2 4326 5063
Cagnano Amiterno AQ 6 1369 6432
Capitignano AQ 8 665 7097
Montereale AQ 9 2581 9678
Scoppito AQ 9 3727 13405
Campotosto AQ 14 542 13947
L'Aquila AQ 14 69753 83700
Borbona RI 15 617 84317
Tornimparte AQ 18 3187 87504
Antrodoco RI 18 2588 90092
Posta RI 18 694 90786
Lucoli AQ 18 1011 91797
Crognaleto TE 19 1297 93094
Micigliano RI 19 127 93221
Borgo Velino RI 20 972 94193
Amatrice RI 20 2657 96850

Municipalities with at least 50000 inhabitants

An earthquake occurred to
14 Km NW of L'Aquila (69753 inhabitants)
41 Km SW of Teramo (54892 inhabitants)
54 Km E of Terni (111501 inhabitants)
68 Km NE of Tivoli (56533 inhabitants)
68 Km NE of Guidonia Montecelio (88673 inhabitants)
71 Km W of Montesilvano (53738 inhabitants)
73 Km W of Chieti (51815 inhabitants)
74 Km SE of Foligno (57155 inhabitants)
76 Km W of Pescara (121014 inhabitants)
91 Km NE of Roma (2864731 inhabitants)
95 Km NE of Velletri (53303 inhabitants)
98 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 1.5 2021-07-28
17:56:24		 42.4512 13.2928 14 2021-12-29
11:12:31		 Bollettino Sismico Italiano INGV 95659771
Reviewed
Rev100 		ML 1.5 2021-07-28
17:56:24		 42.4583 13.2975 14 2021-07-28
18:05:47		 Sala Sismica INGV-Roma 93315081
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-07-28 17:56:24 ± 0.1
Latitude 42.4512 ± 0.0045
Longitude 13.2928 ± 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 95659771

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 560
Semi-minor axis of confidence ellipse (meter) 44
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 61
Circular confidence region, given by single value of horizontal uncertainty (meter) 560.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 76
Number of associated phases, regardless of their use for origin computation 46
Number of defining phases 33
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) 0.64391
Number of stations at which the event was observed 30
Number of stations from which data was used for origin computation 17
Magnitudes information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.3
Num. used stations 18
Type of magnitude ML
Reference to an origin 93315081
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-07-28 18:05:47

ML:1.5

Field Value
Value 1.5
Uncertainty 0.3
Num. used stations 18
Type of magnitude ML
Reference to an origin 95659771
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-09-20 10:07:53
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ZEN8.EHZ. 2021-07-28T17:58:04.67 3.0 undecidable manual Sn -4.35 0
IV.ZCCA.HHZ. 2021-07-28T17:57:40.07 3.0 undecidable manual Sn -1.49 0
IV.EUCT.HNZ. 2021-07-28T17:57:39.28 3.0 undecidable manual Pg 9.72 0
IV.GIZZ.HHZ. 2021-07-28T17:57:37.58 3.0 negative manual Pg 7.56 0
OX.PLRO.HHZ. 2021-07-28T17:57:35.79 3.0 undecidable manual Pg 6.78 0
IV.ZONE.HHZ. 2021-07-28T17:57:34.40 3.0 negative manual Pg 5.81 0
GU.GRAM.HHZ. 2021-07-28T17:57:20.74 3.0 undecidable manual Pg 4.41 0
GU.GSCL.HHZ. 2021-07-28T17:57:16.05 3.0 undecidable manual Pg 4.9 0
IV.PZUN.HHZ. 2021-07-28T17:57:13.41 3.0 negative manual Pg 4.31 0
IV.CPGN.EHZ. 2021-07-28T17:57:12.49 3.0 undecidable manual Sg -3.83 0
IV.FOSV.EHZ. 2021-07-28T17:56:51.09 3.0 undecidable manual S -8.78 0
IV.LPEL.HHZ. 2021-07-28T17:56:49.85 3.0 undecidable manual S -4.61 0
IV.CSP1.EHZ. 2021-07-28T17:56:46.54 0.6 undecidable manual S 354 71.4729 93 0.59 38
IV.MPAG.EHZ. 2021-07-28T17:56:45.77 3.0 undecidable manual P -4.34 0
IV.FDMO.HHZ. 2021-07-28T17:56:45.41 0.3 undecidable manual S 346 67.0773 93 0.63 57
IV.MF5.EHZ. 2021-07-28T17:56:44.12 0.3 undecidable manual S 13 61.0944 94 0.93 51
IV.T0110.HHZ. 2021-07-28T17:56:39.91 0.3 undecidable manual S 122 46.62 96 0.56 62
IV.ARRO.EHZ. 2021-07-28T17:56:38.48 0.3 undecidable manual S 288 45.4212 96 -0.54 62
IV.GAVE.EHZ. 2021-07-28T17:56:38.26 0.3 undecidable manual S 310 42.1245 96 0.11 70
IV.NRCA.HHZ. 2021-07-28T17:56:38.75 0.3 undecidable manual S 341 44.8218 96 -0.12 69
IV.FDMO.HHZ. 2021-07-28T17:56:36.15 0.3 undecidable manual P 346 67.0773 93 -0.02 68
IV.CSP1.EHZ. 2021-07-28T17:56:36.92 0.3 undecidable manual P 354 71.4729 93 0.08 66
IV.MTRA.EHZ. 2021-07-28T17:56:35.68 0.3 undecidable manual S 14 34.9428 98 -0.57 64
IV.MF5.EHZ. 2021-07-28T17:56:35.56 0.3 undecidable manual P 13 61.0944 94 0.31 64
IV.LNSS.HHZ. 2021-07-28T17:56:34.09 0.3 undecidable manual S 309 26.6511 103 0.02 73
IV.FIAM.HHE. 2021-07-28T17:56:33.70 0.3 undecidable manual S 215 24.8529 104 0.08 73
IV.T0110.HHZ. 2021-07-28T17:56:33.12 0.3 undecidable manual P 122 46.62 96 0.09 69
IV.NRCA.HHZ. 2021-07-28T17:56:32.54 0.3 undecidable manual P 341 44.8218 96 -0.22 68
IV.SMA1.EHZ. 2021-07-28T17:56:32.45 0.3 undecidable manual S 10 20.1687 110 0.03 73
IV.ARRO.EHZ. 2021-07-28T17:56:32.83 0.3 undecidable manual P 288 45.4212 96 -0.01 70
IV.T1299.HNZ. 2021-07-28T17:56:32.28 0.6 undecidable manual S 358 20.3685 110 -0.17 48
IV.GIGS.HHZ. 2021-07-28T17:56:32.72 0.3 undecidable manual S 89 22.9548 107 -0.39 68
IV.GAVE.EHZ. 2021-07-28T17:56:32.28 0.3 undecidable manual P 310 42.1245 96 -0.06 70
MN.AQU.HHZ. 2021-07-28T17:56:31.43 0.3 undecidable manual S 139 14.1747 123 0.45 69
IV.TERO.HHZ. 2021-07-28T17:56:30.35 0.3 undecidable manual P 53 31.746 100 -0.41 67
IV.MTRA.EHZ. 2021-07-28T17:56:30.89 0.1 positive manual P 14 34.9428 98 -0.35 90
IV.LNSS.HHZ. 2021-07-28T17:56:30.04 0.1 negative manual P 309 26.6511 103 0.06 97
IV.CAMP.HHZ. 2021-07-28T17:56:30.51 0.3 undecidable manual S 45 13.3755 126 -0.29 71
IV.T1299.HNZ. 2021-07-28T17:56:29.03 0.1 negative manual P 358 20.3685 110 -0.02 98
IV.GIGS.HHZ. 2021-07-28T17:56:29.19 0.1 positive manual P 89 22.9548 107 -0.24 93
IV.FIAM.HHE. 2021-07-28T17:56:29.97 0.3 undecidable manual P 215 24.8529 104 0.25 70
IV.RM33.EHZ. 2021-07-28T17:56:29.79 0.3 undecidable manual S 315 9.0798 140 -0.17 72
IV.SMA1.EHZ. 2021-07-28T17:56:29.01 0.1 positive manual P 10 20.1687 110 -0.02 98
IV.CAMP.HHZ. 2021-07-28T17:56:28.06 0.1 positive manual P 45 13.3755 126 -0.04 99
MN.AQU.HHZ. 2021-07-28T17:56:28.30 0.1 undecidable manual P 139 14.1747 123 0.1 98
IV.RM33.EHZ. 2021-07-28T17:56:27.62 0.1 negative manual P 315 9.0798 140 0.01 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.RM33.EHN. ML:1.3 0.0001905 0.1 AML other m 2021-07-28T17:56:30.07
IV.RM33.HNN. ML:1.3 0.00020250000000000002 0.74 AML other m 2021-07-28T17:56:30.07
IV.RM33.HNE. ML:1.4 0.000256 0.8 AML other m 2021-07-28T17:56:30.88
IV.RM33.EHE. ML:1.4 0.000262 1.28 AML other m 2021-07-28T17:56:30.73
IV.SMA1.EHE. ML:2.3 0.00135 1.64 AML other m 2021-07-28T17:56:32.85
IV.SMA1.EHN. ML:2.1 0.0007555000000000001 0.24 AML other m 2021-07-28T17:56:33.01
IV.LNSS.HHN. ML:1.7 0.0002405 0.34 AML other m 2021-07-28T17:56:34.43
IV.LNSS.HHE. ML:1.6 0.0001915 0.72 AML other m 2021-07-28T17:56:34.92
IV.MTRA.EHN. ML:2.1 0.000463 0.08 AML other m 2021-07-28T17:56:35.78
IV.MTRA.EHE. ML:2.0 0.00038500000000000003 0.14 AML other m 2021-07-28T17:56:36.10
IV.ARRO.EHE. ML:1.2 0.000045600000000000004 0.22 AML other m 2021-07-28T17:56:39.37
IV.NRCA.HHE. ML:1.7 0.0001465 0.22 AML other m 2021-07-28T17:56:39.27
IV.NRCA.HHN. ML:1.6 0.000128 0.1 AML other m 2021-07-28T17:56:39.59
IV.ARRO.EHN. ML:1.3 0.00005525 0.32 AML other m 2021-07-28T17:56:40.25
IV.T0110.HHE. ML:1.5 0.0000889 0.32 AML other m 2021-07-28T17:56:41.73
IV.T0110.HHN. ML:1.5 0.0000944 0.38 AML other m 2021-07-28T17:56:43.78
IV.FDMO.HHN. ML:1.2 0.00002765 1.08 AML other m 2021-07-28T17:56:46.89
IV.FDMO.HHE. ML:1.2 0.00002715 0.42 AML other m 2021-07-28T17:56:47.47
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