Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.8 on date 12-04-2023 and time 21:36:17 (UTC) in region 6 km E Amatrice (RI)

A magnitude ML 0.8 earthquake occured in region: 6 km E Amatrice (RI), on

  • 12-04-2023 21:36:17 (UTC)
  • 12-04-2023 23:36:17 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.6210, 13.3570 at 11 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 6 2657 2657
Campotosto AQ 7 542 3199
Capitignano AQ 12 665 3864
Accumoli RI 12 667 4531
Cortino TE 12 656 5187
Crognaleto TE 13 1297 6484
Montereale AQ 14 2581 9065
Rocca Santa Maria TE 16 537 9602
Cittareale RI 16 482 10084
Fano Adriano TE 17 296 10380
Acquasanta Terme AP 17 2916 13296
Valle Castellana TE 17 977 14273
Arquata del Tronto AP 18 1178 15451
Pietracamela TE 19 271 15722
Barete AQ 20 737 16459

Municipalities with at least 50000 inhabitants

An earthquake occurred to
29 Km W of Teramo (54892 inhabitants)
30 Km N of L'Aquila (69753 inhabitants)
58 Km E of Terni (111501 inhabitants)
65 Km SE of Foligno (57155 inhabitants)
66 Km W of Montesilvano (53738 inhabitants)
72 Km W of Pescara (121014 inhabitants)
73 Km W of Chieti (51815 inhabitants)
86 Km NE of Guidonia Montecelio (88673 inhabitants)
86 Km NE of Tivoli (56533 inhabitants)
96 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
Reviewed
Rev100 		ML 0.8 2023-04-12
21:36:17		 42.6207 13.3567 11 2023-04-12
21:43:42		 Sala Sismica INGV-Roma 116322441
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-04-12 21:36:17 ± 0.06
Latitude 42.6207 ± 0.0054
Longitude 13.3567 ± 0.0049
Depth (km) 11 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 116322441

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 607
Semi-minor axis of confidence ellipse (meter) 379
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 156
Circular confidence region, given by single value of horizontal uncertainty (meter) 610.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 93
Number of associated phases, regardless of their use for origin computation 12
Number of defining phases 12
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) 0.01889
Epicentral distance of station farthest from the epicenter (degree) 0.48384
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 9
Magnitude information

ML:0.8

Field Value
Value 0.8
Uncertainty 0.3
Num. used stations 8
Type of magnitude ML
Reference to an origin 116322441
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-04-12 21:43:42
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CSP1.EHZ. 2023-04-12T21:36:27.44 1.0 negative manual P 347 53.7018 50 0.05 23
IV.FDMO.HHZ. 2023-04-12T21:36:27.01 1.0 positive manual P 335 51.1155 50 0.02 24
IV.TERO.HHZ. 2023-04-12T21:36:25.39 0.3 undecidable manual S 89 20.1687 118 -0.14 73
IV.RM33.EHZ. 2023-04-12T21:36:24.48 0.3 undecidable manual S 223 16.9719 122 -0.08 74
IV.NRCA.HHZ. 2023-04-12T21:36:23.76 0.1 negative manual P 320 30.747 50 -0.1 96
IV.LNSS.HHZ. 2023-04-12T21:36:23.13 0.3 undecidable manual P 266 25.8519 50 0.03 74
IV.MMO1.EHZ. 2023-04-12T21:36:23.86 0.1 undecidable manual P 356 31.0467 50 -0.03 98
IV.GIGS.HHZ. 2023-04-12T21:36:23.24 1.0 undecidable manual P 136 25.6521 50 0.18 24
IV.TERO.HHZ. 2023-04-12T21:36:22.37 1.0 undecidable manual P 89 20.1687 118 0.18 24
IV.SMA1.EHZ. 2023-04-12T21:36:21.20 0.3 undecidable manual S 302 2.0979 169 -0.15 75
IV.RM33.EHZ. 2023-04-12T21:36:21.60 0.1 undecidable manual P 223 16.9719 122 -0.03 100
IV.SMA1.EHZ. 2023-04-12T21:36:20.19 0.3 undecidable manual P 302 2.0979 169 0.41 71
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SMA1.EHE. ML:0.7 0.000091 0.56 AML other m 2023-04-12T21:36:21.97
IV.SMA1.EHN. ML:0.6 0.0000674 1.56 AML other m 2023-04-12T21:36:22.94
IV.TERO.HHE. ML:0.4 0.000021150000000000002 0.06 AML other m 2023-04-12T21:36:22.42
IV.RM33.EHN. ML:0.8 0.000054199999999999996 0.28 AML other m 2023-04-12T21:36:24.81
IV.RM33.EHE. ML:0.8 0.00005755 0.86 AML other m 2023-04-12T21:36:25.84
IV.TERO.HHN. ML:0.6 0.000031100000000000004 0.96 AML other m 2023-04-12T21:36:25.18
IV.NRCA.HHE. ML:1.3 0.0000967 0.1 AML other m 2023-04-12T21:36:28.29
IV.NRCA.HHN. ML:1.1 0.00005495 0.1 AML other m 2023-04-12T21:36:28.27
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