Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.9 on date 19-04-2023 and time 02:55:35 (UTC) in region 4 km NE Leonessa (RI)

A magnitude ML 0.9 earthquake occured in region: 4 km NE Leonessa (RI), on

  • 19-04-2023 02:55:35 (UTC)
  • 19-04-2023 04:55:35 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.5940, 12.9820 at 12 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
Leonessa RI 4 2435 2435
Monteleone di Spoleto PG 7 599 3034
Polino TR 11 233 3267
Posta RI 12 694 3961
Poggio Bustone RI 13 2055 6016
Rivodutri RI 13 1253 7269
Poggiodomo PG 14 117 7386
Cascia PG 14 3217 10603
Morro Reatino RI 14 373 10976
Cittareale RI 15 482 11458
Cantalice RI 15 2755 14213
Borbona RI 15 617 14830
Ferentillo TR 16 1913 16743
Labro RI 17 374 17117
Micigliano RI 17 127 17244
Arrone TR 17 2763 20007
Montefranco TR 18 1276 21283
Scheggino PG 18 461 21744
Colli sul Velino RI 20 533 22277
Sant'Anatolia di Narco PG 20 564 22841

Municipalities with at least 50000 inhabitants

An earthquake occurred to
28 Km E of Terni (111501 inhabitants)
44 Km NW of L'Aquila (69753 inhabitants)
46 Km SE of Foligno (57155 inhabitants)
60 Km W of Teramo (54892 inhabitants)
69 Km NE of Guidonia Montecelio (88673 inhabitants)
72 Km N of Tivoli (56533 inhabitants)
74 Km E of Viterbo (67173 inhabitants)
75 Km SE of Perugia (166134 inhabitants)
88 Km NE of Roma (2864731 inhabitants)
96 Km W of Montesilvano (53738 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 0.9 2023-04-19
02:55:35		 42.5938 12.9817 12 2023-04-19
03:07:30		 Sala Sismica INGV-Roma 116500711
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-04-19 02:55:35 ± 0.08
Latitude 42.5938 ± 0.0054
Longitude 12.9817 ± 0.0049
Depth (km) 12 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 116500711

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 551
Semi-minor axis of confidence ellipse (meter) 287
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 2
Circular confidence region, given by single value of horizontal uncertainty (meter) 550.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 149
Number of associated phases, regardless of their use for origin computation 12
Number of defining phases 11
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.16
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.44876
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 7
Magnitude information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 116500711
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-04-19 03:07:30
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.VCEL.EHZ. 2023-04-19T02:55:50.85 3.0 undecidable manual P 0.72 0
IV.FDMO.HHZ. 2023-04-19T02:55:44.83 0.1 undecidable manual P 10 49.8168 92 0.03 93
IV.RM33.EHZ. 2023-04-19T02:55:43.70 0.1 undecidable manual S 116 21.2676 99 -0.16 95
IV.ARRO.EHZ. 2023-04-19T02:55:42.77 0.1 undecidable manual S 265 17.6712 104 -0.16 96
IV.SMA1.EHZ. 2023-04-19T02:55:41.78 0.1 undecidable manual P 82 29.1486 95 0.16 94
IV.GAVE.EHZ. 2023-04-19T02:55:41.68 0.1 undecidable manual S 327 13.0758 117 -0.08 98
IV.NRCA.HHZ. 2023-04-19T02:55:41.37 0.1 undecidable manual P 22 28.6491 95 -0.18 93
IV.LNSS.HHZ. 2023-04-19T02:55:40.16 0.1 undecidable manual S 78 4.8951 153 -0.06 100
IV.RM33.EHZ. 2023-04-19T02:55:40.42 0.1 undecidable manual P 116 21.2676 99 0.01 98
IV.ARRO.EHZ. 2023-04-19T02:55:39.98 0.1 undecidable manual P 265 17.6712 104 0.1 96
IV.GAVE.EHZ. 2023-04-19T02:55:39.40 0.1 undecidable manual P 327 13.0758 117 0.2 96
IV.LNSS.HHZ. 2023-04-19T02:55:38.42 0.1 undecidable manual P 78 4.8951 153 0.11 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.LNSS.HHE. ML:1.3 0.0002875 0.12 AML other m 2023-04-19T02:55:40.32
IV.LNSS.HHN. ML:1.1 0.00019250000000000002 0.12 AML other m 2023-04-19T02:55:40.42
IV.GAVE.EHN. ML:0.9 0.0000706 0.6 AML other m 2023-04-19T02:55:42.00
IV.GAVE.EHE. ML:0.9 0.0000732 0.22 AML other m 2023-04-19T02:55:42.27
IV.NRCA.HHE. ML:0.7 0.000025300000000000002 1.24 AML other m 2023-04-19T02:55:46.17
IV.NRCA.HHN. ML:0.7 0.00002425 1.06 AML other m 2023-04-19T02:55:47.45
IV.FDMO.HHE. ML:0.8 0.00001341 0.52 AML other m 2023-04-19T02:55:52.37
IV.FDMO.HHN. ML:0.6 0.000011630000000000002 1.56 AML other m 2023-04-19T02:55:52.99
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