Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.0 on date 21-09-2019 and time 16:55:06 (UTC) in region 2 km SW Amatrice (RI)

A magnitude ML 1.0 earthquake occured in region: 2 km SW Amatrice (RI), on

  • 21-09-2019 16:55:06 (UTC)
  • 21-09-2019 18:55:06 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.6160, 13.2790 at 13 km depth.

The earthquake was located by: Sala Sismica INGV-Roma.

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.

Hai sentito il terremoto? Clicca qui

Did you feel it? Fill in the questionnaire.

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 9 667 3324
Cittareale RI 10 482 3806
Campotosto AQ 10 542 4348
Montereale AQ 11 2581 6929
Capitignano AQ 11 665 7594
Borbona RI 17 617 8211
Arquata del Tronto AP 18 1178 9389
Cagnano Amiterno AQ 18 1369 10758
Posta RI 18 694 11452
Crognaleto TE 18 1297 12749
Barete AQ 18 737 13486
Cortino TE 19 656 14142
Pizzoli AQ 20 4326 18468

Municipalities with at least 50000 inhabitants

An earthquake occurred to
31 Km NW of L'Aquila (69753 inhabitants)
35 Km W of Teramo (54892 inhabitants)
52 Km E of Terni (111501 inhabitants)
60 Km SE of Foligno (57155 inhabitants)
72 Km W of Montesilvano (53738 inhabitants)
78 Km W of Pescara (121014 inhabitants)
79 Km W of Chieti (51815 inhabitants)
82 Km NE of Guidonia Montecelio (88673 inhabitants)
83 Km NE of Tivoli (56533 inhabitants)
91 Km SE of Perugia (166134 inhabitants)
99 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
Reviewed
Rev100 		ML 1.0 2019-09-21
16:55:06		 42.616 13.2792 13 2019-09-21
17:00:03		 Sala Sismica INGV-Roma 72620341
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-09-21 16:55:06 ± 0.09
Latitude 42.6160 ± 0.0054
Longitude 13.2792 ± 0.0049
Depth (km) 13 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 72620341

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 529
Semi-minor axis of confidence ellipse (meter) 453
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 152
Circular confidence region, given by single value of horizontal uncertainty (meter) 530.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 116
Number of associated phases, regardless of their use for origin computation 13
Number of defining phases 12
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) 0.24911
Number of stations at which the event was observed 7
Number of stations from which data was used for origin computation 6
Magnitude information

ML:1.0

Field Value
Value 1.0
Uncertainty 0.2
Num. used stations 12
Type of magnitude ML
Reference to an origin 72620341
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-09-21 17:00:03
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.TERO.HHZ. 2019-09-21T16:55:16.19 0.3 undecidable manual S 88 26.5512 97 -0.22 70
IV.NRCA.HHZ. 2019-09-21T16:55:16.55 0.3 undecidable manual S 331 27.6501 97 -0.16 72
IV.MF5.EHZ. 2019-09-21T16:55:15.39 3.0 undecidable manual P 0.09 0
IV.MTRA.EHZ. 2019-09-21T16:55:14.02 0.3 undecidable manual S 31 18.2706 106 -0.24 72
IV.LNSS.HHZ. 2019-09-21T16:55:14.48 0.3 undecidable manual S 266 19.5693 104 -0.1 73
IV.TERO.HHZ. 2019-09-21T16:55:12.51 0.3 undecidable manual P 88 26.5512 97 0.14 73
IV.NRCA.HHZ. 2019-09-21T16:55:12.69 0.3 undecidable manual P 331 27.6501 97 0.15 72
IV.RM33.EHZ. 2019-09-21T16:55:12.71 0.3 undecidable manual S 204 12.9759 120 -0.24 72
IV.MTRA.EHZ. 2019-09-21T16:55:11.18 0.1 undecidable manual P 31 18.2706 106 0.05 100
IV.SMA1.EHZ. 2019-09-21T16:55:11.48 0.3 undecidable manual S 71 4.8951 154 0.03 77
IV.LNSS.HHZ. 2019-09-21T16:55:11.37 0.3 undecidable manual P 266 19.5693 104 0.06 75
IV.RM33.EHZ. 2019-09-21T16:55:10.48 0.1 undecidable manual P 204 12.9759 120 0.11 100
IV.SMA1.EHZ. 2019-09-21T16:55:09.77 0.1 undecidable manual P 71 4.8951 154 0.26 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SMA1.EHN. ML:1.1 0.0001605 0.4 AML other m 2019-09-21T16:55:11.96
IV.SMA1.EHE. ML:1.4 0.0003605 1.38 AML other m 2019-09-21T16:55:11.78
IV.RM33.EHE. ML:1.1 0.0001188 0.3 AML other m 2019-09-21T16:55:13.06
IV.RM33.EHN. ML:0.8 0.00006525 0.92 AML other m 2019-09-21T16:55:13.09
IV.MTRA.EHN. ML:1.1 0.0000913 0.2 AML other m 2019-09-21T16:55:14.37
IV.LNSS.HHN. ML:0.9 0.00004875 0.32 AML other m 2019-09-21T16:55:14.61
IV.LNSS.HHE. ML:1.0 0.00007300000000000001 0.14 AML other m 2019-09-21T16:55:14.72
IV.MTRA.EHE. ML:1.0 0.00006595 0.74 AML other m 2019-09-21T16:55:15.56
IV.TERO.HHE. ML:0.8 0.00003595 0.14 AML other m 2019-09-21T16:55:16.31
IV.TERO.HHN. ML:0.9 0.00003955 0.66 AML other m 2019-09-21T16:55:16.19
IV.NRCA.HHN. ML:0.9 0.00003759999999999999 0.12 AML other m 2019-09-21T16:55:16.68
IV.NRCA.HHE. ML:1.1 0.00006055000000000001 1.04 AML other m 2019-09-21T16:55:17.69
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