Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.4 on date 11-03-2021 and time 12:16:12 (Italy) in region 7 km NE Amatrice (RI)

A magnitude ML 1.4 earthquake occured in region: 7 km NE Amatrice (RI), on

  • 11-03-2021 11:16:12 (UTC)
  • 11-03-2021 12:16:12 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.6780, 13.3420 at 7 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 7 2657 2657
Accumoli RI 8 667 3324
Arquata del Tronto AP 11 1178 4502
Acquasanta Terme AP 12 2916 7418
Campotosto AQ 14 542 7960
Valle Castellana TE 14 977 8937
Cortino TE 15 656 9593
Rocca Santa Maria TE 15 537 10130
Cittareale RI 16 482 10612
Capitignano AQ 18 665 11277
Crognaleto TE 18 1297 12574
Montegallo AP 18 523 13097
Montereale AQ 19 2581 15678

Municipalities with at least 50000 inhabitants

An earthquake occurred to
30 Km W of Teramo (54892 inhabitants)
37 Km N of L'Aquila (69753 inhabitants)
58 Km E of Terni (111501 inhabitants)
61 Km SE of Foligno (57155 inhabitants)
69 Km W of Montesilvano (53738 inhabitants)
75 Km W of Pescara (121014 inhabitants)
77 Km W of Chieti (51815 inhabitants)
91 Km NE of Guidonia Montecelio (88673 inhabitants)
91 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 1.4 2021-03-11
11:16:12		 42.6777 13.3418 7 2021-07-12
16:55:02		 Bollettino Sismico Italiano INGV 88216631
Reviewed
Rev100 		ML 1.4 2021-03-11
11:16:13		 42.6793 13.3378 5 2021-03-11
11:31:41		 Sala Sismica INGV-Roma 87999121
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-03-11 11:16:12 ± 0.07
Latitude 42.6777 ± 0.0018
Longitude 13.3418 ± 0.0037
Depth (km) 7 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 88216631

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 289
Semi-minor axis of confidence ellipse (meter) 86
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 79
Circular confidence region, given by single value of horizontal uncertainty (meter) 290.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 62
Number of associated phases, regardless of their use for origin computation 34
Number of defining phases 25
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.18
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.35973
Number of stations at which the event was observed 23
Number of stations from which data was used for origin computation 14
Magnitudes information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.1
Num. used stations 3
Type of magnitude ML
Reference to an origin 88216631
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-03-17 14:13:00

ML:1.4

Field Value
Value 1.4
Uncertainty 0.2
Num. used stations 6
Type of magnitude ML
Reference to an origin 87999121
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-03-11 11:31:41
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MTGR.HHZ. 2021-03-11T11:17:32.96 3.0 undecidable manual Pg 8.25 0
IV.SARZ.HNZ. 2021-03-11T11:17:28.27 3.0 undecidable manual Pg 16.620001 0
IV.ZEN8.EHZ. 2021-03-11T11:17:18.02 3.0 undecidable manual Pg 11.59 0
GU.CANO.HHZ. 2021-03-11T11:17:16.42 3.0 undecidable manual Pn 2.85 0
IV.IOCA.HHZ. 2021-03-11T11:17:15.31 3.0 undecidable manual Sg 3.24 0
CR.STON.BHZ. 2021-03-11T11:17:09.58 3.0 undecidable manual Pn 6.72 0
IV.RIBO.EHZ.01 2021-03-11T11:17:05.87 3.0 undecidable manual Sn 1.06 0
IV.ARVD.HHZ. 2021-03-11T11:16:41.64 3.0 undecidable manual S -0.94 0
IV.CPGN.EHZ. 2021-03-11T11:16:35.70 3.0 undecidable manual P -1.13 0
IV.MC2.EHZ. 2021-03-11T11:16:23.32 0.3 undecidable manual S 334 28.749 104 0.2 71
IV.GIGS.HHZ. 2021-03-11T11:16:23.60 0.6 undecidable manual S 143 31.2465 103 -0.37 45
IV.TERO.HHZ. 2021-03-11T11:16:21.14 0.3 undecidable manual S 106 22.2555 108 0.19 72
IV.LNSS.HNN. 2021-03-11T11:16:21.99 0.3 undecidable manual S 251 25.9518 105 -0.2 71
IV.OFFI.HHZ. 2021-03-11T11:16:21.09 0.6 undecidable manual P 44 39.9267 50 0.15 47
IV.NRCA.HHZ. 2021-03-11T11:16:21.82 0.3 undecidable manual S 313 25.3524 106 -0.16 72
IV.MMO1.EHZ. 2021-03-11T11:16:21.76 0.3 undecidable manual S 357 24.6531 106 0.03 74
IV.RM33.HNE. 2021-03-11T11:16:20.92 0.6 undecidable manual S 209 21.3675 108 0.25 47
IV.GAVE.HNZ. 2021-03-11T11:16:20.40 0.1 undecidable manual P 273 36.5412 101 0.09 95
IV.MF5.EHZ. 2021-03-11T11:16:19.92 0.1 undecidable manual P 16 35.742 101 -0.22 93
IV.CAMP.HHE. 2021-03-11T11:16:19.05 0.3 undecidable manual S 161 16.6722 113 -0.08 74
IV.GIGS.HHZ. 2021-03-11T11:16:18.85 0.3 undecidable manual P 143 31.2465 103 -0.42 67
IV.MC2.EHZ. 2021-03-11T11:16:18.68 0.3 undecidable manual P 334 28.749 104 -0.1 72
IV.LNSS.HNN. 2021-03-11T11:16:18.49 0.6 undecidable manual P 251 25.9518 105 0.25 47
IV.MMO1.EHZ. 2021-03-11T11:16:17.98 0.3 undecidable manual P 357 24.6531 106 0 74
IV.RM33.HNE. 2021-03-11T11:16:17.43 0.3 undecidable manual P 209 21.3675 108 0.06 74
IV.MTRA.EHZ. 2021-03-11T11:16:17.00 0.3 undecidable manual S 27 9.879 126 -0.05 75
IV.TERO.HHZ. 2021-03-11T11:16:17.61 0.3 undecidable manual P 106 22.2555 108 0.09 73
IV.NRCA.HHZ. 2021-03-11T11:16:17.83 0.1 undecidable manual P 313 25.3524 106 -0.29 93
IV.CAMP.HHE. 2021-03-11T11:16:16.60 0.1 undecidable manual P 161 16.6722 113 0.12 98
IV.T1299.HNN. 2021-03-11T11:16:16.36 0.3 undecidable manual S 225 6.8931 136 0.09 75
IV.SMA1.EHZ. 2021-03-11T11:16:15.60 0.3 undecidable manual S 186 5.2947 143 -0.31 72
IV.T1299.HNN. 2021-03-11T11:16:15.05 0.1 undecidable manual P 225 6.8931 136 0.23 97
IV.MTRA.EHZ. 2021-03-11T11:16:15.50 0.1 undecidable manual P 27 9.879 126 0.22 97
IV.SMA1.EHZ. 2021-03-11T11:16:14.73 0.1 positive manual P 186 5.2947 143 0.11 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SMA1.EHE. ML:0.0 0.00060593555 0.3008 AML other m 2021-03-11T11:16:15.77
IV.SMA1.EHN. ML:0.0 0.0015686775000000003 0.16 AML other m 2021-03-11T11:16:15.87
IV.MTRA.EHN. ML:1.4 0.00040100000000000004 0.28 AML other m 2021-03-11T11:16:17.47
IV.MTRA.EHE. ML:1.3 0.00030202034999999997 0.3008 AML other m 2021-03-11T11:16:17.28
IV.MTRA.HNE. ML:1.4 0.000338891 0.3712 AML other m 2021-03-11T11:16:17.28
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