Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.0 on date 28-04-2023 and time 16:25:21 (UTC) in region 3 km SW Visso (MC)

A magnitude ML 1.0 earthquake occured in region: 3 km SW Visso (MC), on

  • 28-04-2023 16:25:21 (UTC)
  • 28-04-2023 18:25:21 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.9120, 13.0590 at 11 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
Visso MC 3 1107 1107
Preci PG 4 724 1831
Ussita MC 8 444 2275
Castelsantangelo sul Nera MC 8 281 2556
Monte Cavallo MC 10 145 2701
Sellano PG 11 1079 3780
Norcia PG 14 4957 8737
Fiordimonte MC 14 202 8939
Pieve Torina MC 15 1458 10397
Cerreto di Spoleto PG 15 1075 11472
Fiastra MC 16 559 12031
Acquacanina MC 16 121 12152
Bolognola MC 17 142 12294
Pievebovigliana MC 17 866 13160
Muccia MC 19 915 14075
Serravalle di Chienti MC 20 1070 15145

Municipalities with at least 50000 inhabitants

An earthquake occurred to
29 Km E of Foligno (57155 inhabitants)
52 Km NE of Terni (111501 inhabitants)
59 Km E of Perugia (166134 inhabitants)
60 Km W of Teramo (54892 inhabitants)
68 Km NW of L'Aquila (69753 inhabitants)
87 Km SW of Ancona (100861 inhabitants)
95 Km NE of Viterbo (67173 inhabitants)
100 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
Bulletin
Rev1000 		ML 1.0 2023-04-28
16:25:21		 42.9123 13.0592 11 2024-03-01
17:18:11		 Bollettino Sismico Italiano INGV 118328061
Reviewed
Rev100 		ML 1.0 2023-04-28
16:25:22		 42.9147 13.0542 10 2023-04-28
16:36:11		 Sala Sismica INGV-Roma 116843441
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-04-28 16:25:21 ± 0.05
Latitude 42.9123 ± 0.0027
Longitude 13.0592 ± 0.0037
Depth (km) 11 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 118328061

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 369
Semi-minor axis of confidence ellipse (meter) 252
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 220
Circular confidence region, given by single value of horizontal uncertainty (meter) 370.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 85
Number of associated phases, regardless of their use for origin computation 25
Number of defining phases 25
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.17
Epicentral distance of station closest to the epicenter (degree) 0.05036
Epicentral distance of station farthest from the epicenter (degree) 0.32016
Number of stations at which the event was observed 13
Number of stations from which data was used for origin computation 13
Magnitudes information

ML:1.0

Field Value
Value 1.0
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 118328061
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2023-06-12 06:32:17

ML:1.0

Field Value
Value 1.0
Uncertainty 0.2
Num. used stations 12
Type of magnitude ML
Reference to an origin 116843441
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-04-28 16:36:11
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ASSB.HHZ. 2023-04-28T16:25:33.75 0.3 undecidable manual S 294 35.5422 50 -0.04 73
IV.GAVE.EHN. 2023-04-28T16:25:31.82 0.6 undecidable manual S 209 27.8499 50 0.09 49
IV.CSP1.EHZ. 2023-04-28T16:25:30.50 0.3 undecidable manual S 31 23.1546 50 0.02 75
IV.MML1.EHZ. 2023-04-28T16:25:30.45 0.3 undecidable manual S 342 23.4543 50 -0.1 74
IV.MMO1.EHZ. 2023-04-28T16:25:30.08 0.3 undecidable manual S 94 21.7671 50 -0.04 75
7F.SIB2.EHE. 2023-04-28T16:25:29.30 0.3 undecidable manual S 97 20.0688 50 -0.34 71
IV.MF5.EHZ. 2023-04-28T16:25:28.87 0.6 undecidable manual P 75 33.5442 50 0.44 45
7F.SIB3.EHN. 2023-04-28T16:25:28.59 0.6 undecidable manual S 103 17.6712 50 -0.41 46
IV.CESI.HHZ. 2023-04-28T16:25:28.55 0.3 undecidable manual S 309 16.1727 50 -0.07 75
IV.ASSB.HHZ. 2023-04-28T16:25:28.69 0.3 undecidable manual P 294 35.5422 50 -0.04 73
IV.FDMO.HHZ. 2023-04-28T16:25:27.87 0.6 undecidable manual S 9 13.9749 128 -0.13 50
IV.GAVE.EHN. 2023-04-28T16:25:27.29 0.1 undecidable manual P 209 27.8499 50 -0.26 94
IV.MML1.EHZ. 2023-04-28T16:25:27.14 0.3 undecidable manual P 342 23.4543 50 0.28 71
IV.NRCA.HHZ. 2023-04-28T16:25:26.82 0.6 undecidable manual S 153 9.7791 138 -0.13 50
IV.MMO1.EHZ. 2023-04-28T16:25:26.75 0.1 undecidable manual P 94 21.7671 50 0.14 98
IV.CSP1.EHZ. 2023-04-28T16:25:26.82 0.3 undecidable manual P 31 23.1546 50 0 75
IT.MTCL.HGZ. 2023-04-28T16:25:26.73 0.3 undecidable manual S 332 10.2786 137 -0.33 72
7F.SIB3.EHN. 2023-04-28T16:25:26.09 0.1 undecidable manual P 103 17.6712 50 0.12 99
7F.SIB2.EHE. 2023-04-28T16:25:26.39 0.1 undecidable manual P 97 20.0688 50 0.05 100
IV.FDMO.HHZ. 2023-04-28T16:25:25.54 0.1 undecidable manual P 9 13.9749 128 0.15 99
IV.FEMA.HNE. 2023-04-28T16:25:25.90 0.3 undecidable manual S 352 5.5944 153 -0.22 74
IV.CESI.HHZ. 2023-04-28T16:25:25.92 0.1 positive manual P 309 16.1727 50 0.17 98
IV.FEMA.HNE. 2023-04-28T16:25:24.49 0.3 undecidable manual P 352 5.5944 153 0.18 75
IV.NRCA.HHZ. 2023-04-28T16:25:24.97 0.1 negative manual P 153 9.7791 138 0.18 99
IT.MTCL.HGZ. 2023-04-28T16:25:24.92 0.3 undecidable manual P 332 10.2786 137 0.08 76
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHN. ML:1.2 0.00021200000000000003 0.1 AML other m 2023-04-28T16:25:26.94
IV.NRCA.HHE. ML:1.0 0.00011649999999999999 0.18 AML other m 2023-04-28T16:25:27.04
IV.FDMO.HHE. ML:0.7 0.00004375 0.1 AML other m 2023-04-28T16:25:28.06
IV.FDMO.HHN. ML:0.8 0.00006385 0.14 AML other m 2023-04-28T16:25:28.42
IV.CESI.HHN. ML:1.3 0.0001625 0.14 AML other m 2023-04-28T16:25:28.86
IV.CESI.HHE. ML:0.9 0.00007505000000000001 0.1 AML other m 2023-04-28T16:25:28.87
IV.MMO1.EHE. ML:1.1 0.0000886 0.22 AML other m 2023-04-28T16:25:30.34
IV.MMO1.EHN. ML:0.9 0.000054199999999999996 0.32 AML other m 2023-04-28T16:25:30.70
IV.ASSB.HHE. ML:1.0 0.0000412 0.3 AML other m 2023-04-28T16:25:34.24
IV.ASSB.HHN. ML:1.1 0.000042800000000000004 0.26 AML other m 2023-04-28T16:25:34.17
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