Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.8 on date 12-04-2023 and time 19:58:43 (UTC) in region 8 km SE Cascia (PG)

A magnitude ML 0.8 earthquake occured in region: 8 km SE Cascia (PG), on

  • 12-04-2023 19:58:43 (UTC)
  • 12-04-2023 21:58:43 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.6710, 13.0880 at 10 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
Cascia PG 8 3217 3217
Cittareale RI 8 482 3699
Monteleone di Spoleto PG 11 599 4298
Poggiodomo PG 13 117 4415
Accumoli RI 13 667 5082
Norcia PG 14 4957 10039
Leonessa RI 16 2435 12474
Posta RI 16 694 13168
Amatrice RI 17 2657 15825
Borbona RI 18 617 16442

Municipalities with at least 50000 inhabitants

An earthquake occurred to
38 Km E of Terni (111501 inhabitants)
44 Km NW of L'Aquila (69753 inhabitants)
45 Km SE of Foligno (57155 inhabitants)
51 Km W of Teramo (54892 inhabitants)
75 Km SE of Perugia (166134 inhabitants)
80 Km NE of Guidonia Montecelio (88673 inhabitants)
82 Km N of Tivoli (56533 inhabitants)
85 Km E of Viterbo (67173 inhabitants)
89 Km W of Montesilvano (53738 inhabitants)
95 Km W of Pescara (121014 inhabitants)
95 Km W of Chieti (51815 inhabitants)
100 Km NE of Roma (2864731 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
19:58:43		 42.6712 13.0883 10 2023-04-12
20:03:24		 Sala Sismica INGV-Roma 116320691
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-04-12 19:58:43 ± 0.07
Latitude 42.6712 ± 0.0045
Longitude 13.0883 ± 0.0061
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 116320691

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 471
Semi-minor axis of confidence ellipse (meter) 398
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 219
Circular confidence region, given by single value of horizontal uncertainty (meter) 470.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 89
Number of associated phases, regardless of their use for origin computation 16
Number of defining phases 16
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.2
Epicentral distance of station closest to the epicenter (degree) 0.07644
Epicentral distance of station farthest from the epicenter (degree) 0.28778
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 8
Magnitude information

ML:0.8

Field Value
Value 0.8
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 116320691
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-04-12 20:03:24
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MMO1.EHZ. 2023-04-12T19:58:54.29 0.3 undecidable manual S 37 31.9458 50 -0.02 74
7F.SIB1.EHZ. 2023-04-12T19:58:53.45 0.6 undecidable manual S 31 28.8489 50 -0.05 49
7F.SIB3.EHZ. 2023-04-12T19:58:52.66 0.6 undecidable manual S 33 27.0507 50 -0.35 46
IV.SMA1.EHZ. 2023-04-12T19:58:51.14 0.3 undecidable manual S 103 20.6682 116 0.12 74
IV.NRCA.HHZ. 2023-04-12T19:58:50.00 0.3 undecidable manual S 7 18.1707 119 -0.24 72
IV.RM33.EHZ. 2023-04-12T19:58:50.73 0.3 undecidable manual S 150 20.7681 115 -0.31 71
IV.MMO1.EHZ. 2023-04-12T19:58:49.45 0.1 undecidable manual P 37 31.9458 50 -0.11 97
7F.SIB1.EHZ. 2023-04-12T19:58:49.04 0.3 undecidable manual P 31 28.8489 50 -0.05 74
7F.SIB3.EHZ. 2023-04-12T19:58:49.31 0.3 undecidable manual P 33 27.0507 50 0.5 67
IV.GAVE.EHZ. 2023-04-12T19:58:49.51 0.3 undecidable manual S 278 15.9729 122 -0.09 75
IV.SMA1.EHZ. 2023-04-12T19:58:47.89 0.1 undecidable manual P 103 20.6682 116 0.23 96
IV.NRCA.HHZ. 2023-04-12T19:58:47.29 0.1 undecidable manual P 7 18.1707 119 0.08 99
IV.LNSS.HHZ. 2023-04-12T19:58:47.56 0.3 undecidable manual S 207 8.4804 139 -0.04 76
IV.RM33.EHZ. 2023-04-12T19:58:47.50 0.1 undecidable manual P 150 20.7681 115 -0.17 97
IV.GAVE.EHZ. 2023-04-12T19:58:46.91 0.1 undecidable manual P 278 15.9729 122 0.07 100
IV.LNSS.HHZ. 2023-04-12T19:58:45.86 0.1 undecidable manual P 207 8.4804 139 0.17 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.LNSS.HHE. ML:1.1 0.0001595 0.16 AML other m 2023-04-12T19:58:47.83
IV.LNSS.HHN. ML:1.0 0.00014150000000000002 0.18 AML other m 2023-04-12T19:58:47.80
IV.GAVE.EHE. ML:0.7 0.000050950000000000005 0.16 AML other m 2023-04-12T19:58:49.90
IV.GAVE.EHN. ML:0.9 0.00006515 0.1 AML other m 2023-04-12T19:58:49.89
IV.NRCA.HHN. ML:0.6 0.00003455 0.1 AML other m 2023-04-12T19:58:50.89
IV.NRCA.HHE. ML:0.7 0.000041099999999999996 0.94 AML other m 2023-04-12T19:58:50.43
IV.SMA1.EHN. ML:0.8 0.00004315 0.28 AML other m 2023-04-12T19:58:51.54
IV.SMA1.EHE. ML:0.5 0.000023199999999999998 0.18 AML other m 2023-04-12T19:58:51.44
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