Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.2 on date 14-08-2023 and time 14:45:44 (UTC) in region 6 km S Castel Ritaldi (PG)

A magnitude ML 1.2 earthquake occured in region: 6 km S Castel Ritaldi (PG), on

  • 14-08-2023 14:45:44 (UTC)
  • 14-08-2023 16:45:44 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.7720, 12.6620 at 8 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.

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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
Castel Ritaldi PG 6 3278 3278
Spoleto PG 8 38218 41496
Giano dell'Umbria PG 10 3846 45342
Campello sul Clitunno PG 11 2442 47784
Massa Martana PG 11 3770 51554
Acquasparta TR 13 4778 56332
Trevi PG 14 8469 64801
Montefalco PG 14 5679 70480
Sant'Anatolia di Narco PG 15 564 71044
Scheggino PG 15 461 71505
Vallo di Nera PG 16 364 71869
Gualdo Cattaneo PG 18 6155 78024
Bevagna PG 19 5081 83105
Montecastrilli TR 20 5022 88127
Ferentillo TR 20 1913 90040
San Gemini TR 20 5018 95058

Municipalities with at least 50000 inhabitants

An earthquake occurred to
21 Km S of Foligno (57155 inhabitants)
24 Km N of Terni (111501 inhabitants)
43 Km SE of Perugia (166134 inhabitants)
60 Km NE of Viterbo (67173 inhabitants)
76 Km NW of L'Aquila (69753 inhabitants)
86 Km N of Guidonia Montecelio (88673 inhabitants)
86 Km W of Teramo (54892 inhabitants)
91 Km N of Tivoli (56533 inhabitants)
99 Km N of Roma (2864731 inhabitants)
100 Km SE of Arezzo (99543 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 1.2 2023-08-14
14:45:44		 42.7723 12.6625 8 2023-08-14
14:52:14		 Sala Sismica INGV-Roma 120120221
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-08-14 14:45:44 ± 0.1
Latitude 42.7723 ± 0.0045
Longitude 12.6625 ± 0.0074
Depth (km) 8 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 120120221

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 629
Semi-minor axis of confidence ellipse (meter) 413
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 246
Circular confidence region, given by single value of horizontal uncertainty (meter) 630.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 136
Number of associated phases, regardless of their use for origin computation 19
Number of defining phases 18
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.21
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.50902
Number of stations at which the event was observed 10
Number of stations from which data was used for origin computation 9
Magnitude information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.3
Num. used stations 14
Type of magnitude ML
Reference to an origin 120120221
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-08-14 14:52:14
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.LRP.EHZ. 2023-08-14T14:46:09.38 3.0 undecidable manual P 0.98 0
IV.CSP1.EHZ. 2023-08-14T14:46:02.75 1.0 undecidable manual S 51 56.499 50 0.37 21
IV.FDMO.HHZ. 2023-08-14T14:45:59.45 0.6 undecidable manual S 50 45.2214 50 0.08 46
IV.NRCA.HHZ. 2023-08-14T14:45:57.46 0.6 undecidable manual S 79 37.4292 50 0.19 46
IV.CESI.HNZ. 2023-08-14T14:45:55.77 0.6 undecidable manual S 37 32.4453 104 -0.03 48
IV.ASSB.HHZ. 2023-08-14T14:45:55.53 0.6 undecidable manual S 359 29.9478 105 0.56 42
IV.CSP1.EHZ. 2023-08-14T14:45:54.72 0.6 positive manual P 51 56.499 50 0.03 46
IV.ARRO.EHZ. 2023-08-14T14:45:53.08 0.3 undecidable manual S 159 23.0547 110 0.41 67
IV.FDMO.HHZ. 2023-08-14T14:45:52.11 1.0 negative manual P 50 45.2214 50 -0.85 18
IV.NRCA.HHZ. 2023-08-14T14:45:51.43 0.6 undecidable manual P 79 37.4292 50 -0.31 45
IV.GAVE.EHN. 2023-08-14T14:45:51.98 0.6 undecidable manual S 115 20.868 111 0.01 49
IV.CESI.HNZ. 2023-08-14T14:45:50.68 0.1 undecidable manual P 37 32.4453 104 -0.21 92
IV.ASSB.HHZ. 2023-08-14T14:45:50.52 0.3 positive manual P 359 29.9478 105 0.11 71
IV.MOMA.HHZ. 2023-08-14T14:45:48.07 0.6 undecidable manual S 295 8.2806 135 -0.16 49
IV.GAVE.EHN. 2023-08-14T14:45:48.22 0.6 undecidable manual P 115 20.868 111 -0.46 45
IT.GNU.HGN. 2023-08-14T14:45:48.16 0.6 undecidable manual S 295 8.2806 135 -0.07 50
IV.ARRO.EHZ. 2023-08-14T14:45:48.97 0.6 positive manual P 159 23.0547 110 -0.12 48
IV.MOMA.HHZ. 2023-08-14T14:45:46.54 0.1 positive manual P 295 8.2806 135 0.02 100
IT.GNU.HGN. 2023-08-14T14:45:46.54 0.1 undecidable manual P 295 8.2806 135 0.02 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MOMA.HHE. ML:1.8 0.00090473335 0.1152 AML other m 2023-08-14T14:45:48.90
IV.MOMA.HHN. ML:1.9 0.001204788 0.16 AML other m 2023-08-14T14:45:48.81
IV.MOMA.HNE. ML:1.6 0.0006481124000000001 0.128 AML other m 2023-08-14T14:45:49.03
IV.MOMA.HNN. ML:1.8 0.0011339920000000001 0.16 AML other m 2023-08-14T14:45:48.82
IV.ARRO.EHE. ML:0.0 0.000050044 0.2816 AML other m 2023-08-14T14:45:53.56
IV.ARRO.EHN. ML:0.0 0.00007428164500000001 0.1792 AML other m 2023-08-14T14:45:54.72
IV.ASSB.HHE. ML:1.0 0.000052889785 0.1984 AML other m 2023-08-14T14:45:55.82
IV.ASSB.HHN. ML:1.0 0.00005569147 0.16 AML other m 2023-08-14T14:45:56.04
IV.NRCA.HHE. ML:1.1 0.00004634212 0.096 AML other m 2023-08-14T14:45:58.41
IV.NRCA.HHN. ML:1.0 0.000038627235000000004 0.1792 AML other m 2023-08-14T14:45:58.41
IV.FDMO.HHE. ML:0.9 0.00002464778 0.2048 AML other m 2023-08-14T14:46:01.26
IV.FDMO.HHN. ML:0.9 0.00002293326 0.2048 AML other m 2023-08-14T14:46:00.30
IV.CSP1.EHE. ML:1.3 0.000043000005 0.5376 AML other m 2023-08-14T14:46:07.30
IV.CSP1.EHN. ML:1.2 0.000039054985000000004 0.2624 AML other m 2023-08-14T14:46:03.58
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