Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.5 on date 28-08-2021 and time 19:42:48 (UTC) in region 5 km E Antrodoco (RI)

A magnitude ML 1.5 earthquake occured in region: 5 km E Antrodoco (RI), on

  • 28-08-2021 19:42:48 (UTC)
  • 28-08-2021 21:42:48 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.4060, 13.1440 at 11 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
Antrodoco RI 5 2588 2588
Borgo Velino RI 7 972 3560
Micigliano RI 9 127 3687
Cagnano Amiterno AQ 9 1369 5056
Castel Sant'Angelo RI 9 1308 6364
Scoppito AQ 10 3727 10091
Borbona RI 12 617 10708
Barete AQ 12 737 11445
Pizzoli AQ 13 4326 15771
Posta RI 14 694 16465
Petrella Salto RI 14 1197 17662
Montereale AQ 16 2581 20243
Fiamignano RI 16 1413 21656
Concerviano RI 16 291 21947
Cittaducale RI 16 6828 28775
Tornimparte AQ 18 3187 31962
Capitignano AQ 18 665 32627

Municipalities with at least 50000 inhabitants

An earthquake occurred to
22 Km W of L'Aquila (69753 inhabitants)
44 Km E of Terni (111501 inhabitants)
54 Km SW of Teramo (54892 inhabitants)
57 Km NE of Guidonia Montecelio (88673 inhabitants)
57 Km NE of Tivoli (56533 inhabitants)
71 Km SE of Foligno (57155 inhabitants)
79 Km NE of Roma (2864731 inhabitants)
83 Km W of Montesilvano (53738 inhabitants)
84 Km W of Chieti (51815 inhabitants)
85 Km E of Viterbo (67173 inhabitants)
86 Km NE of Velletri (53303 inhabitants)
88 Km W of Pescara (121014 inhabitants)
97 Km NE of Pomezia (62966 inhabitants)
99 Km NE of Aprilia (73446 inhabitants)
99 Km SE of Perugia (166134 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 2021-08-28
19:42:48		 42.4062 13.1443 11 2021-12-29
11:12:33		 Bollettino Sismico Italiano INGV 95974901
Reviewed
Rev100 		ML 1.5 2021-08-28
19:42:48		 42.3975 13.1663 11 2021-08-28
19:53:26		 Sala Sismica INGV-Roma 94763651
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-08-28 19:42:48 ± 0.05
Latitude 42.4062 ± 0.0027
Longitude 13.1443 ± 0.0049
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 95974901

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 380
Semi-minor axis of confidence ellipse (meter) 295
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 248
Circular confidence region, given by single value of horizontal uncertainty (meter) 380.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 101
Number of associated phases, regardless of their use for origin computation 36
Number of defining phases 26
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.15
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.68618
Number of stations at which the event was observed 31
Number of stations from which data was used for origin computation 21
Magnitudes information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.2
Num. used stations 22
Type of magnitude ML
Reference to an origin 94763651
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-08-28 19:53:26

ML:1.5

Field Value
Value 1.5
Uncertainty 0.3
Num. used stations 27
Type of magnitude ML
Reference to an origin 95974901
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-09-28 05:30:32
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.SALO.HNZ. 2021-08-28T19:44:43.35 3.0 undecidable manual Sg 13.41 0
IV.MBAL.EHZ. 2021-08-28T19:44:30.13 3.0 undecidable manual Sn 1.27 0
IV.PTRP.HHZ. 2021-08-28T19:44:07.79 3.0 undecidable manual Sn 0.9 0
IX.COL3.HHZ.02 2021-08-28T19:44:03.37 3.0 undecidable manual Sg 9.17 0
IV.ESCV.HHZ. 2021-08-28T19:43:57.46 3.0 positive manual Pn -0.85 0
IV.ORI.HHZ. 2021-08-28T19:43:51.33 3.0 positive manual Pg 11.95 0
GU.GORR.HHZ. 2021-08-28T19:43:45.89 3.0 positive manual Pn 3.36 0
GU.GSCL.HHZ. 2021-08-28T19:43:36.79 3.0 undecidable manual Pg 6.12 0
IV.SACS.HHZ. 2021-08-28T19:43:23.94 3.0 undecidable manual S 0.92 0
IV.VULT.HHZ. 2021-08-28T19:43:23.70 3.0 undecidable manual Pn -0.97 0
IV.CSP1.EHZ. 2021-08-28T19:43:02.06 0.6 undecidable manual P 4 76.1682 50 0.25 43
IV.MF5.EHZ. 2021-08-28T19:43:01.04 1.0 undecidable manual P 22 69.4749 50 0.27 22
IV.FDMO.HHZ. 2021-08-28T19:43:00.83 0.6 undecidable manual P 356 70.0743 50 -0.04 45
IV.MOMA.HHZ. 2021-08-28T19:43:00.43 0.6 undecidable manual P 313 64.3911 50 0.44 42
IV.CERT.HNE. 2021-08-28T19:42:58.00 1.0 undecidable manual P 195 52.4031 50 -0.15 23
IV.MC2.EHZ. 2021-08-28T19:42:58.82 0.6 undecidable manual P 4 56.1993 50 0.1 46
IV.CAMP.HHE. 2021-08-28T19:42:57.94 0.6 undecidable manual S 56 25.9518 50 -0.11 48
IV.LNSS.HNZ. 2021-08-28T19:42:57.25 0.3 undecidable manual S 339 23.4543 50 -0.11 73
IV.NRCA.HHZ. 2021-08-28T19:42:57.28 0.3 undecidable manual P 357 47.5191 50 -0.1 70
IV.CESX.HHE. 2021-08-28T19:42:57.74 1.0 undecidable manual P 296 50.8158 50 -0.16 23
MN.AQU.HNN. 2021-08-28T19:42:57.00 0.3 undecidable manual S 105 22.1556 50 -0.02 74
IV.MTRA.EHZ. 2021-08-28T19:42:56.56 0.3 undecidable manual P 28 44.0226 50 -0.29 68
IV.TERO.HHZ. 2021-08-28T19:42:56.64 0.3 undecidable manual P 57 44.622 50 -0.3 67
IV.FAGN.HHZ. 2021-08-28T19:42:56.25 1.0 undecidable manual P 113 39.2274 50 0.13 23
IV.GAVE.EHZ. 2021-08-28T19:42:55.75 0.6 undecidable manual P 327 37.7289 50 -0.13 47
IV.FIAM.HHZ. 2021-08-28T19:42:55.07 0.3 undecidable manual S 188 15.4734 125 -0.17 73
IV.GIGS.HHN. 2021-08-28T19:42:55.82 0.6 undecidable manual P 81 35.4423 50 0.29 46
IV.ARRO.EHZ. 2021-08-28T19:42:55.67 0.3 negative manual P 302 36.4413 50 -0.01 73
IV.RM33.EHZ. 2021-08-28T19:42:54.38 0.3 undecidable manual S 27 12.7761 131 -0.11 74
IV.T1299.HNN. 2021-08-28T19:42:54.42 0.3 undecidable manual P 24 27.6501 50 0.09 73
IV.SMA1.EHZ. 2021-08-28T19:42:54.66 0.3 undecidable manual P 32 29.3484 50 0.06 73
MN.AQU.HNN. 2021-08-28T19:42:53.88 0.6 undecidable manual P 105 22.1556 50 0.4 46
IV.CAMP.HHE. 2021-08-28T19:42:53.61 1.0 undecidable manual P 56 25.9518 50 -0.46 22
IV.LNSS.HNZ. 2021-08-28T19:42:53.74 0.6 undecidable manual P 339 23.4543 50 0.07 49
IV.RM33.EHZ. 2021-08-28T19:42:52.21 0.1 negative manual P 27 12.7761 131 0.19 97
IV.FIAM.HHZ. 2021-08-28T19:42:52.48 0.1 undecidable manual P 188 15.4734 125 0.03 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.RM33.EHE. ML:1.8 0.0006274999999999999 0.28 AML other m 2021-08-28T19:42:54.69
IV.RM33.HNE. ML:1.8 0.000612 0.28 AML other m 2021-08-28T19:42:54.83
IV.RM33.HNN. ML:1.6 0.00040445505000000003 0.2176 AML other m 2021-08-28T19:42:54.57
IV.RM33.EHN. ML:1.5 0.00036062709999999995 0.2176 AML other m 2021-08-28T19:42:54.57
IV.FIAM.HHN. ML:1.3 0.000177 0.14 AML other m 2021-08-28T19:42:55.35
IV.FIAM.HHE. ML:1.0 0.000102262045 0.256 AML other m 2021-08-28T19:42:55.58
IV.SMA1.EHE. ML:1.5 0.000155368915 0.1792 AML other m 2021-08-28T19:42:59.75
IV.SMA1.EHN. ML:1.2 0.000084990375 0.192 AML other m 2021-08-28T19:43:00.14
IV.ARRO.EHE. ML:1.0 0.000034953865 0.1408 AML other m 2021-08-28T19:43:04.46
IV.GAVE.EHE. ML:1.4 0.00008758833499999999 0.2048 AML other m 2021-08-28T19:43:03.32
IV.GAVE.EHN. ML:1.5 0.00011064999999999999 0.28 AML other m 2021-08-28T19:43:02.20
IV.MTRA.EHN. ML:0.0 0.00020420365 0.0768 AML other m 2021-08-28T19:43:03.36
IV.MTRA.EHE. ML:0.0 0.0001650054 0.0768 AML other m 2021-08-28T19:43:03.35
IV.ARRO.EHN. ML:1.2 0.00005915 0.12 AML other m 2021-08-28T19:43:03.54
IV.NRCA.HHE. ML:0.0 0.00023645415 0.1408 AML other m 2021-08-28T19:43:04.57
IV.NRCA.HHN. ML:0.0 0.00010349311999999999 0.1152 AML other m 2021-08-28T19:43:04.79
IV.TERO.HHN. ML:1.1 0.00004035116499999999 0.2304 AML other m 2021-08-28T19:43:04.08
IV.FAGN.HHE. ML:1.5 0.0001045 0.7 AML other m 2021-08-28T19:43:04.95
IV.FAGN.HHN. ML:1.5 0.00010045 0.4 AML other m 2021-08-28T19:43:05.73
IV.MOMA.HHE. ML:0.0 0.000060316245 0.2176 AML other m 2021-08-28T19:43:10.87
IV.MOMA.HHN. ML:0.0 0.000039032425 0.1792 AML other m 2021-08-28T19:43:10.89
IV.FIAM.HNN. ML:1.5 0.00030835725 0.1408 AML other m 2021-08-28T19:42:55.42
IV.MTRA.HNN. ML:1.8 0.0002027245 0.0896 AML other m 2021-08-28T19:43:03.31
IV.MTRA.HNE. ML:1.8 0.000175391 0.0768 AML other m 2021-08-28T19:43:03.35
IV.NRCA.HNE. ML:1.9 0.00022070095 0.1408 AML other m 2021-08-28T19:43:04.58
IV.MOMA.HNN. ML:1.8 0.000127983865 0.8192 AML other m 2021-08-28T19:43:16.28
IV.FDMO.HHE. ML:1.0 0.000017174390000000002 0.1408 AML other m 2021-08-28T19:43:12.71
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