Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.1 on date 11-03-2021 and time 14:40:28 (UTC) in region 2 km NE Amatrice (RI)

A magnitude ML 2.1 earthquake occured in region: 2 km NE Amatrice (RI), on

  • 11-03-2021 14:40:28 (UTC)
  • 11-03-2021 15:40:28 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.6450, 13.3030 at 12 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
Amatrice RI 2 2657 2657
Accumoli RI 7 667 3324
Campotosto AQ 11 542 3866
Cittareale RI 12 482 4348
Capitignano AQ 14 665 5013
Montereale AQ 14 2581 7594
Arquata del Tronto AP 14 1178 8772
Acquasanta Terme AP 16 2916 11688
Cortino TE 17 656 12344
Crognaleto TE 18 1297 13641
Valle Castellana TE 19 977 14618
Rocca Santa Maria TE 19 537 15155

Municipalities with at least 50000 inhabitants

An earthquake occurred to
33 Km W of Teramo (54892 inhabitants)
34 Km N of L'Aquila (69753 inhabitants)
55 Km E of Terni (111501 inhabitants)
60 Km SE of Foligno (57155 inhabitants)
71 Km W of Montesilvano (53738 inhabitants)
77 Km W of Pescara (121014 inhabitants)
78 Km W of Chieti (51815 inhabitants)
86 Km NE of Guidonia Montecelio (88673 inhabitants)
86 Km NE of Tivoli (56533 inhabitants)
91 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 2.1 2021-03-11
14:40:28		 42.6453 13.3032 12 2021-07-12
16:55:03		 Bollettino Sismico Italiano INGV 88280501
Reviewed
Rev100 		ML 2.0 2021-03-11
14:40:28		 42.642 13.3057 11 2021-03-11
14:46:02		 Sala Sismica INGV-Roma 88004031
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-03-11 14:40:28 ± 0.04
Latitude 42.6453 ± 0.0018
Longitude 13.3032 ± 0.0037
Depth (km) 12 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 88280501

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 270
Semi-minor axis of confidence ellipse (meter) 17
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 246
Circular confidence region, given by single value of horizontal uncertainty (meter) 270.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 52
Number of associated phases, regardless of their use for origin computation 57
Number of defining phases 57
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) 0.01889
Epicentral distance of station farthest from the epicenter (degree) 1.06030
Number of stations at which the event was observed 32
Number of stations from which data was used for origin computation 32
Magnitudes information

ML:2.0

Field Value
Value 2.0
Uncertainty 0.3
Num. used stations 36
Type of magnitude ML
Reference to an origin 88004031
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-03-11 14:46:02

ML:2.1

Field Value
Value 2.1
Uncertainty 0.3
Num. used stations 36
Type of magnitude ML
Reference to an origin 88280501
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-04-22 17:57:57
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.SRES.HHN. 2021-03-11T14:40:52.58 0.6 undecidable manual S 235 79.1652 91 0.11 44
IV.EL6.EHZ. 2021-03-11T14:40:52.30 1.0 undecidable manual S 348 77.6667 91 0.25 21
IV.MPAG.EHZ. 2021-03-11T14:40:48.42 0.6 undecidable manual P 338 117.6933 90 -0.01 41
IV.CESX.HHZ. 2021-03-11T14:40:47.21 0.3 undecidable manual S 266 58.5969 91 0.23 67
IV.MML1.HNE. 2021-03-11T14:40:47.11 0.6 undecidable manual S 333 58.497 91 0.16 45
IV.CESI.HHZ. 2021-03-11T14:40:45.20 0.6 undecidable manual S 321 51.4152 91 0.15 46
IV.FAGN.HHZ. 2021-03-11T14:40:44.08 0.6 undecidable manual S 151 48.0186 91 -0.06 47
IV.GUMA.HHZ. 2021-03-11T14:40:44.54 0.6 undecidable manual S 3 46.3203 91 0.83 37
IV.CSP1.EHZ. 2021-03-11T14:40:44.80 0.6 undecidable manual S 351 50.2164 91 0.08 46
IV.ARRO.EHZ. 2021-03-11T14:40:43.28 0.6 undecidable manual S 261 44.5221 91 0.07 47
IT.MTCL.HGZ. 2021-03-11T14:40:43.26 0.6 undecidable manual S 328 45.9207 91 -0.32 44
IV.FIAM.HNZ. 2021-03-11T14:40:43.28 0.3 undecidable manual S 200 44.5221 91 0.06 71
IV.EL6.EHZ. 2021-03-11T14:40:42.44 0.6 undecidable manual P 348 77.6667 91 0.19 43
IV.MF5.EHZ. 2021-03-11T14:40:42.12 0.6 undecidable manual S 18 40.0266 91 0.09 47
IV.SRES.HHN. 2021-03-11T14:40:42.63 0.6 undecidable manual P 235 79.1652 91 0.13 44
IV.FEMA.HNZ. 2021-03-11T14:40:42.03 0.6 undecidable manual S 330 40.7259 91 -0.18 46
IV.GAVE.EHZ. 2021-03-11T14:40:40.24 0.3 undecidable manual S 279 33.744 92 -0.11 71
IV.MOMA.HNZ. 2021-03-11T14:40:39.57 0.6 undecidable manual P 287 62.2932 91 -0.32 43
IV.CESX.HHZ. 2021-03-11T14:40:39.21 0.6 undecidable manual P 266 58.5969 91 -0.12 45
IV.GIGS.HHZ. 2021-03-11T14:40:39.13 0.6 undecidable manual S 134 30.6471 92 -0.39 45
IV.MC2.EHZ. 2021-03-11T14:40:39.60 0.3 undecidable manual S 343 30.9468 92 0.01 73
IV.MML1.HNE. 2021-03-11T14:40:38.98 0.1 undecidable manual P 333 58.497 91 -0.33 87
IV.VCEL.EHN. 2021-03-11T14:40:38.25 0.6 undecidable manual P 122 52.0035 91 -0.06 47
IV.MNTT.EHZ. 2021-03-11T14:40:38.37 0.6 undecidable manual P 27 52.0035 91 0.07 46
IV.SAP2.EHE. 2021-03-11T14:40:38.12 0.6 undecidable manual P 9 50.7159 91 0.02 47
IV.OFFI.HHZ. 2021-03-11T14:40:38.07 0.1 undecidable manual P 44 44.7219 91 0.88 72
IV.CESI.HHZ. 2021-03-11T14:40:38.10 0.3 undecidable manual P 321 51.4152 91 -0.11 69
IV.MMO1.EHZ. 2021-03-11T14:40:38.64 0.3 undecidable manual S 4 28.2495 92 -0.23 71
IV.GUMA.HHZ. 2021-03-11T14:40:37.70 0.1 undecidable manual P 3 46.3203 91 0.26 90
IV.TERO.HNZ. 2021-03-11T14:40:37.51 0.3 undecidable manual S 96 24.6531 93 -0.41 69
IV.CSP1.EHZ. 2021-03-11T14:40:37.80 0.6 undecidable manual P 351 50.2164 91 -0.22 45
IV.NRCA.HNZ. 2021-03-11T14:40:37.85 0.3 undecidable manual S 324 25.9518 93 -0.41 68
IV.ARRO.EHZ. 2021-03-11T14:40:37.05 0.3 undecidable manual P 261 44.5221 91 -0.1 70
IV.FAGN.HHZ. 2021-03-11T14:40:37.85 0.6 undecidable manual P 151 48.0186 91 0.17 46
IV.FDMO.HHZ. 2021-03-11T14:40:37.87 0.6 undecidable manual P 338 46.8198 91 0.36 44
IT.MTCL.HGZ. 2021-03-11T14:40:37.62 0.1 undecidable manual P 328 45.9207 91 0.25 90
IV.LNSS.HHZ. 2021-03-11T14:40:37.17 0.3 undecidable manual S 258 21.9669 94 -0.03 73
IV.FIAM.HNZ. 2021-03-11T14:40:37.17 0.6 undecidable manual P 200 44.5221 91 0.01 48
IV.FEMA.HNZ. 2021-03-11T14:40:36.73 0.6 undecidable manual P 330 40.7259 91 0.16 46
IV.MF5.EHZ. 2021-03-11T14:40:36.66 0.6 undecidable manual P 18 40.0266 91 0.19 46
IV.MC2.EHZ. 2021-03-11T14:40:35.01 0.1 undecidable manual P 343 30.9468 92 -0.05 97
IV.CAMP.HHZ. 2021-03-11T14:40:35.29 0.3 undecidable manual S 145 14.874 104 -0.05 75
IV.GAVE.EHZ. 2021-03-11T14:40:35.46 0.1 positive manual P 279 33.744 92 -0.04 96
IV.RM33.EHZ. 2021-03-11T14:40:35.92 0.3 undecidable manual S 206 16.7721 99 0.1 74
IV.MMO1.EHZ. 2021-03-11T14:40:34.52 0.3 undecidable manual P 4 28.2495 92 -0.13 72
IV.MTRA.EHZ. 2021-03-11T14:40:34.65 0.3 undecidable manual S 32 14.4744 105 -0.58 67
IV.GIGS.HHZ. 2021-03-11T14:40:34.81 0.1 undecidable manual P 134 30.6471 92 -0.21 94
IV.TERO.HNZ. 2021-03-11T14:40:34.00 0.1 negative manual P 96 24.6531 93 -0.1 97
IV.NRCA.HNZ. 2021-03-11T14:40:34.15 0.1 undecidable manual P 324 25.9518 93 -0.14 96
IV.RM33.EHZ. 2021-03-11T14:40:33.14 0.1 positive manual P 206 16.7721 99 0.25 95
IV.LNSS.HHZ. 2021-03-11T14:40:33.80 0.1 positive manual P 258 21.9669 94 0.12 97
IV.MTRA.EHZ. 2021-03-11T14:40:32.34 0.3 undecidable manual P 32 14.4744 105 -0.2 73
IV.SMA1.EHZ. 2021-03-11T14:40:32.79 0.3 undecidable manual S 122 3.0969 161 -0.23 73
IV.CAMP.HHZ. 2021-03-11T14:40:32.76 0.3 undecidable manual P 145 14.874 104 0.16 73
IV.T1299.HNZ. 2021-03-11T14:40:32.89 0.1 undecidable manual S 234 2.0979 167 -0.05 100
IV.SMA1.EHZ. 2021-03-11T14:40:31.42 0.1 undecidable manual P 122 3.0969 161 0.16 100
IV.T1299.HNZ. 2021-03-11T14:40:31.42 0.1 undecidable manual P 234 2.0979 167 0.2 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SMA1.EHN. ML:2.4 0.0042650000000000006 1.7 AML other m 2021-03-11T14:40:32.86
IV.SMA1.EHE. ML:2.3 0.002855 0.72 AML other m 2021-03-11T14:40:33.51
IV.MTRA.EHN. ML:2.5 0.00277 0.48 AML other m 2021-03-11T14:40:34.70
IV.MTRA.HNN. ML:2.5 0.002785 0.48 AML other m 2021-03-11T14:40:34.70
IV.MTRA.HNE. ML:2.4 0.0021349999999999997 0.5 AML other m 2021-03-11T14:40:35.13
IV.MTRA.EHE. ML:2.4 0.002125 0.5 AML other m 2021-03-11T14:40:35.13
IV.CAMP.HHN. ML:1.7 0.00047650000000000004 0.2 AML other m 2021-03-11T14:40:35.52
IV.CAMP.HHE. ML:1.8 0.0005635 0.22 AML other m 2021-03-11T14:40:35.41
IV.RM33.HNN. ML:1.9 0.0006739999999999999 1.24 AML other m 2021-03-11T14:40:36.19
IV.RM33.EHN. ML:1.8 0.000568 0.46 AML other m 2021-03-11T14:40:36.29
IV.RM33.HNE. ML:1.8 0.0005899999999999999 0.82 AML other m 2021-03-11T14:40:36.21
IV.RM33.EHE. ML:1.8 0.0005645 1.02 AML other m 2021-03-11T14:40:36.63
IV.TERO.HHN. ML:2.3 0.0012395000000000002 0.06 AML other m 2021-03-11T14:40:37.59
IV.TERO.HNN. ML:2.3 0.0012349999999999998 0.08 AML other m 2021-03-11T14:40:37.60
IV.TERO.HNE. ML:2.1 0.0008115 0.18 AML other m 2021-03-11T14:40:37.68
IV.TERO.HHE. ML:2.2 0.0009450000000000001 0.18 AML other m 2021-03-11T14:40:37.69
IV.NRCA.HHN. ML:2.3 0.001175 1.9 AML other m 2021-03-11T14:40:38.98
IV.NRCA.HNN. ML:2.3 0.0010435000000000002 1.88 AML other m 2021-03-11T14:40:38.98
IV.NRCA.HHE. ML:2.4 0.0012749999999999999 0.1 AML other m 2021-03-11T14:40:38.14
IV.NRCA.HNE. ML:2.3 0.0011949999999999999 0.22 AML other m 2021-03-11T14:40:38.14
IV.LNSS.HHE. ML:1.9 0.0005735 0.12 AML other m 2021-03-11T14:40:38.32
IV.LNSS.HHN. ML:1.9 0.000464 0.18 AML other m 2021-03-11T14:40:38.43
IV.GAVE.EHN. ML:2.1 0.0005455 0.58 AML other m 2021-03-11T14:40:40.57
IV.GAVE.EHE. ML:2.0 0.00044199999999999996 1.32 AML other m 2021-03-11T14:40:41.87
IV.GUMA.HHE. ML:2.1 0.0003635 1.72 AML other m 2021-03-11T14:40:44.01
IV.GUMA.HHN. ML:2.0 0.00030649999999999997 0.4 AML other m 2021-03-11T14:40:45.30
IV.FDMO.HHN. ML:1.3 0.00006055000000000001 0.24 AML other m 2021-03-11T14:40:45.68
IV.FDMO.HHE. ML:1.4 0.00006435 0.22 AML other m 2021-03-11T14:40:45.94
IV.ARRO.EHN. ML:1.7 0.00014399999999999998 0.2 AML other m 2021-03-11T14:40:46.01
IV.CESI.HHE. ML:1.5 0.0000776 0.32 AML other m 2021-03-11T14:40:46.48
IV.ARRO.EHE. ML:1.5 0.00009570000000000001 0.64 AML other m 2021-03-11T14:40:46.99
IV.CESI.HHN. ML:1.6 0.00011 0.42 AML other m 2021-03-11T14:40:47.66
IV.CESX.HHN. ML:1.6 0.00008245 1.54 AML other m 2021-03-11T14:40:48.21
IV.CESX.HHE. ML:1.5 0.0000658 0.34 AML other m 2021-03-11T14:40:49.22
IV.MNTT.EHE. ML:2.6 0.001125 0.16 AML other m 2021-03-11T14:40:49.64
IV.MNTT.EHN. ML:2.2 0.0004 0.38 AML other m 2021-03-11T14:40:49.74
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
Waveforms Seismic signals in miniseed + resp format Download