Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.5 on date 18-04-2023 and time 14:47:18 (UTC) in region 10 km W Monte Cavallo (MC)

A magnitude ML 0.5 earthquake occured in region: 10 km W Monte Cavallo (MC), on

  • 18-04-2023 14:47:18 (UTC)
  • 18-04-2023 16:47:18 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.9880, 12.8800 at 5 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

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
Monte Cavallo MC 10 145 145
Serravalle di Chienti MC 11 1070 1215
Sellano PG 12 1079 2294
Valtopina PG 13 1398 3692
Foligno PG 15 57155 60847
Pieve Torina MC 15 1458 62305
Nocera Umbra PG 16 5839 68144
Trevi PG 16 8469 76613
Spello PG 17 8645 85258
Muccia MC 17 915 86173
Preci PG 18 724 86897
Fiordimonte MC 18 202 87099
Visso MC 18 1107 88206
Pievebovigliana MC 19 866 89072
Sefro MC 19 422 89494
Cerreto di Spoleto PG 19 1075 90569

Municipalities with at least 50000 inhabitants

An earthquake occurred to
15 Km E of Foligno (57155 inhabitants)
42 Km E of Perugia (166134 inhabitants)
51 Km NE of Terni (111501 inhabitants)
77 Km W of Teramo (54892 inhabitants)
82 Km NW of L'Aquila (69753 inhabitants)
87 Km SW of Ancona (100861 inhabitants)
90 Km NE of Viterbo (67173 inhabitants)
96 Km S of Fano (60888 inhabitants)
97 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
Bulletin
Rev1000 		ML 0.5 2023-04-18
14:47:18		 42.9875 12.8798 5 2024-03-01
17:18:20		 Bollettino Sismico Italiano INGV 125133211
Reviewed
Rev100 		ML 0.5 2023-04-18
14:47:18		 42.9742 12.8623 5 2023-04-18
15:06:51		 Sala Sismica INGV-Roma 116491461
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-04-18 14:47:18 ± 0.08
Latitude 42.9875 ± 0.0036
Longitude 12.8798 ± 0.0037
Depth (km) 5 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 125133211

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 385
Semi-minor axis of confidence ellipse (meter) 135
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 202
Circular confidence region, given by single value of horizontal uncertainty (meter) 390.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 58
Number of associated phases, regardless of their use for origin computation 30
Number of defining phases 30
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.24
Epicentral distance of station closest to the epicenter (degree) 0.02518
Epicentral distance of station farthest from the epicenter (degree) 0.52790
Number of stations at which the event was observed 16
Number of stations from which data was used for origin computation 16
Magnitudes information

ML:0.5

Field Value
Value 0.5
Uncertainty 0.1
Num. used stations 6
Type of magnitude ML
Reference to an origin 125133211
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2024-02-08 17:44:56

ML:0.5

Field Value
Value 0.5
Uncertainty 0.1
Num. used stations 6
Type of magnitude ML
Reference to an origin 116491461
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-04-18 15:06:51
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.EL6.EHE. 2023-04-18T14:47:33.26 0.6 undecidable manual S 25 41.9247 96 -0.27 44
IV.FOSV.HNE. 2023-04-18T14:47:31.05 0.6 undecidable manual S 344 35.4423 97 -0.23 45
IV.MMO1.EHN. 2023-04-18T14:47:31.99 0.6 undecidable manual S 105 37.5291 97 -0.04 47
7F.SIB2.EHE. 2023-04-18T14:47:31.40 0.6 undecidable manual S 107 36.0417 97 -0.1 46
IV.MOMA.HNZ. 2023-04-18T14:47:30.51 0.6 undecidable manual S 231 32.3454 98 0.27 45
IV.TSM4.DHZ. 2023-04-18T14:47:30.70 0.6 undecidable manual P 308 58.5969 50 0.54 40
7F.SIB3.EHN. 2023-04-18T14:47:30.09 0.6 undecidable manual S 111 34.0437 98 -0.72 39
IV.GAVE.EHZ. 2023-04-18T14:47:30.85 0.6 undecidable manual S 178 32.745 98 0.48 43
7F.SIB1.EHE. 2023-04-18T14:47:30.80 0.6 undecidable manual S 108 33.3444 98 0.24 45
IV.CSP1.EHZ. 2023-04-18T14:47:29.05 0.6 undecidable manual S 66 28.749 99 0.05 47
IV.SMA1.EHZ. 2023-04-18T14:47:29.33 1.0 undecidable manual P 137 54.2013 50 -0.16 22
IV.NRCA.HHZ. 2023-04-18T14:47:28.06 0.6 undecidable manual S 132 25.5522 100 0.15 47
IV.MMO1.EHN. 2023-04-18T14:47:26.67 1.0 undecidable manual P 105 37.5291 97 0.2 23
IV.EL6.EHE. 2023-04-18T14:47:26.70 1.0 undecidable manual P 25 41.9247 96 -0.64 20
IV.FOSV.HNE. 2023-04-18T14:47:26.58 0.6 undecidable manual P 344 35.4423 97 0.53 42
7F.SIB2.EHE. 2023-04-18T14:47:25.88 0.1 undecidable manual P 107 36.0417 97 -0.29 89
IV.MML1.EHZ. 2023-04-18T14:47:25.12 0.6 undecidable manual S 28 15.873 106 0.51 44
IV.ASSB.HHZ. 2023-04-18T14:47:25.44 0.6 undecidable manual S 289 18.9699 104 -0.22 47
IV.MOMA.HNZ. 2023-04-18T14:47:25.27 0.6 undecidable manual P 231 32.3454 98 -0.17 46
IV.CSP1.EHZ. 2023-04-18T14:47:25.13 1.0 undecidable manual P 66 28.749 99 0.4 22
7F.SIB3.EHN. 2023-04-18T14:47:25.41 0.1 undecidable manual P 111 34.0437 98 -0.36 88
IV.FDMO.HHZ. 2023-04-18T14:47:25.71 0.6 undecidable manual S 72 17.6712 105 0.48 44
IV.GAVE.EHZ. 2023-04-18T14:47:25.74 0.1 undecidable manual P 178 32.745 98 0.22 91
7F.SIB1.EHE. 2023-04-18T14:47:25.76 0.1 undecidable manual P 108 33.3444 98 0.14 93
IV.NRCA.HHZ. 2023-04-18T14:47:23.85 0.1 undecidable manual P 132 25.5522 100 -0.24 92
IV.FDMO.HHZ. 2023-04-18T14:47:22.66 0.1 undecidable manual P 72 17.6712 105 0.11 96
IV.MML1.EHZ. 2023-04-18T14:47:22.39 1.0 negative manual P 28 15.873 106 0.2 24
IV.ASSB.HHZ. 2023-04-18T14:47:22.45 0.1 undecidable manual P 289 18.9699 104 -0.35 91
IV.CESI.HHZ. 2023-04-18T14:47:20.81 0.3 undecidable manual S 46 2.7972 149 0.04 75
IV.CESI.HHZ. 2023-04-18T14:47:19.96 0.1 positive manual P 46 2.7972 149 -0.01 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MML1.EHN. ML:0.5 0.00003345 0.22 AML other m 2023-04-18T14:47:25.38
IV.FDMO.HHE. ML:0.4 0.0000272 0.2 AML other m 2023-04-18T14:47:26.12
IV.MML1.EHE. ML:0.5 0.0000371 0.26 AML other m 2023-04-18T14:47:26.34
IV.FDMO.HHN. ML:0.4 0.000026500000000000004 0.16 AML other m 2023-04-18T14:47:26.35
IV.ASSB.HHN. ML:0.5 0.000031 0.78 AML other m 2023-04-18T14:47:26.46
IV.ASSB.HHE. ML:0.5 0.0000313 0.5 AML other m 2023-04-18T14:47:27.43
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