Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.4 on date 05-05-2021 and time 11:23:09 (UTC) in region 2 km NE Amatrice (RI)

A magnitude ML 1.4 earthquake occured in region: 2 km NE Amatrice (RI), on

  • 05-05-2021 11:23:09 (UTC)
  • 05-05-2021 13:23:09 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.6440, 13.3010 at 13 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 17 2916 11688
Cortino TE 17 656 12344
Crognaleto TE 18 1297 13641
Rocca Santa Maria TE 19 537 14178
Valle Castellana TE 19 977 15155

Municipalities with at least 50000 inhabitants

An earthquake occurred to
33 Km W of Teramo (54892 inhabitants)
33 Km N of L'Aquila (69753 inhabitants)
54 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)
90 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 2021-05-05
11:23:09		 42.6442 13.3013 13 2021-12-29
11:12:02		 Bollettino Sismico Italiano INGV 90697311
Reviewed
Rev100 		ML 1.5 2021-05-05
11:23:09		 42.6428 13.3003 13 2021-05-05
11:30:27		 Sala Sismica INGV-Roma 89795821
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-05-05 11:23:09 ± 0.08
Latitude 42.6442 ± 0.0027
Longitude 13.3013 ± 0.0049
Depth (km) 13 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 90697311

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 408
Semi-minor axis of confidence ellipse (meter) 58
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 236
Circular confidence region, given by single value of horizontal uncertainty (meter) 410.0
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 29
Number of defining phases 25
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.23
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.42268
Number of stations at which the event was observed 17
Number of stations from which data was used for origin computation 13
Magnitudes information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.1
Num. used stations 12
Type of magnitude ML
Reference to an origin 90697311
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-06-01 14:40:24

ML:1.5

Field Value
Value 1.5
Uncertainty 0.1
Num. used stations 13
Type of magnitude ML
Reference to an origin 89795821
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-05-05 11:30:27
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.RIBO.EHZ.01 2021-05-05T11:24:05.45 3.0 undecidable manual Sg 5.52 0
IV.CAFE.HHZ. 2021-05-05T11:23:45.10 3.0 undecidable manual Pn 0.54 0
IV.COR1.EHZ. 2021-05-05T11:23:43.87 3.0 undecidable manual S -1.53 0
IV.ATPI.EHZ. 2021-05-05T11:23:28.55 3.0 negative manual P -0.72 0
IV.FDMO.HHZ. 2021-05-05T11:23:24.42 0.1 undecidable manual S 338 46.9197 94 -0.11 93
IV.MF5.EHZ. 2021-05-05T11:23:23.24 0.1 undecidable manual S 19 40.2264 94 0.47 86
IV.MC2.EHZ. 2021-05-05T11:23:20.18 0.3 undecidable manual S 343 31.0467 97 -0.14 71
IV.GIGS.HHE. 2021-05-05T11:23:19.89 0.1 undecidable manual S 134 30.6471 97 -0.34 91
IV.MMO1.EHZ. 2021-05-05T11:23:19.60 0.1 undecidable manual S 4 28.3494 98 -0.02 98
IV.TERO.HHZ. 2021-05-05T11:23:18.43 0.1 undecidable manual S 95 24.8529 100 -0.25 94
IV.NRCA.HHZ. 2021-05-05T11:23:18.53 0.1 undecidable manual S 324 25.9518 99 -0.44 90
IV.FDMO.HHZ. 2021-05-05T11:23:18.23 0.1 undecidable manual P 338 46.9197 94 0.03 94
IV.LNSS.HHZ. 2021-05-05T11:23:17.82 0.1 undecidable manual S 258 21.7671 103 -0.06 97
IV.MF5.EHZ. 2021-05-05T11:23:17.69 0.1 undecidable manual P 19 40.2264 94 0.51 85
IV.CAMP.HHE. 2021-05-05T11:23:16.14 0.1 undecidable manual S 144 14.874 116 0 100
IV.GAVE.EHZ. 2021-05-05T11:23:16.17 0.3 undecidable manual P 279 33.6441 96 0.01 72
IV.RM33.EHZ. 2021-05-05T11:23:16.64 0.1 undecidable manual S 205 16.5723 112 0.09 99
IV.MMO1.EHZ. 2021-05-05T11:23:15.35 0.1 positive manual P 4 28.3494 98 -0.01 97
IV.MC2.EHZ. 2021-05-05T11:23:15.37 0.3 undecidable manual P 343 31.0467 97 -0.39 68
IV.GIGS.HHE. 2021-05-05T11:23:15.57 0.1 negative manual P 134 30.6471 97 -0.14 95
IV.SMA1.EHE. 2021-05-05T11:23:14.00 0.1 undecidable manual S 119 3.1968 163 -0.07 100
IV.LNSS.HHZ. 2021-05-05T11:23:14.42 0.1 positive manual P 258 21.7671 103 0.06 98
IV.TERO.HHZ. 2021-05-05T11:23:14.69 0.1 undecidable manual P 95 24.8529 100 -0.13 97
IV.NRCA.HHZ. 2021-05-05T11:23:14.91 0.1 negative manual P 324 25.9518 99 -0.08 97
IV.T1299.HNN. 2021-05-05T11:23:13.94 0.1 undecidable manual S 235 1.8981 170 -0.05 100
IV.RM33.EHZ. 2021-05-05T11:23:13.79 0.1 positive manual P 205 16.5723 112 0.19 96
IV.CAMP.HHE. 2021-05-05T11:23:13.54 0.1 negative manual P 144 14.874 116 0.18 96
IV.T1299.HNN. 2021-05-05T11:23:12.33 0.1 positive manual P 235 1.8981 170 0.21 98
IV.SMA1.EHE. 2021-05-05T11:23:12.38 0.1 undecidable manual P 119 3.1968 163 0.22 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.RM33.EHN. ML:1.4 0.00018354084999999999 0.16 AML other m 2021-05-05T11:23:16.84
IV.RM33.HNN. ML:1.4 0.00018321195000000002 0.0704 AML other m 2021-05-05T11:23:16.87
IV.RM33.EHE. ML:1.3 0.000145527915 0.096 AML other m 2021-05-05T11:23:16.87
IV.RM33.HNE. ML:1.3 0.00016768209 0.1216 AML other m 2021-05-05T11:23:16.86
IV.LNSS.HHN. ML:1.6 0.000236 1.84 AML other m 2021-05-05T11:23:17.01
IV.LNSS.HHE. ML:1.4 0.00014081771500000002 0.0768 AML other m 2021-05-05T11:23:17.94
IV.TERO.HHN. ML:1.2 0.000095203905 0.1408 AML other m 2021-05-05T11:23:18.54
IV.TERO.HHE. ML:1.5 0.00017275960000000002 0.1024 AML other m 2021-05-05T11:23:18.61
IV.TERO.HNE. ML:1.6 0.00019960035 0.1024 AML other m 2021-05-05T11:23:18.63
IV.NRCA.HHE. ML:1.5 0.00018483405 0.0768 AML other m 2021-05-05T11:23:18.81
IV.NRCA.HNN. ML:1.6 0.00020351215 0.128 AML other m 2021-05-05T11:23:18.83
IV.NRCA.HHN. ML:1.6 0.00022317755 0.1152 AML other m 2021-05-05T11:23:18.82
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