Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.7 on date 25-04-2023 and time 17:21:31 (UTC) in region 1 km NW Ussita (MC)

A magnitude ML 1.7 earthquake occured in region: 1 km NW Ussita (MC), on

  • 25-04-2023 17:21:31 (UTC)
  • 25-04-2023 19:21:31 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.9520, 13.1340 at 8 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.

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
Ussita MC 1 444 444
Visso MC 4 1107 1551
Castelsantangelo sul Nera MC 7 281 1832
Bolognola MC 9 142 1974
Acquacanina MC 9 121 2095
Fiastra MC 10 559 2654
Fiordimonte MC 10 202 2856
Preci PG 11 724 3580
Monte Cavallo MC 12 145 3725
Pieve Torina MC 12 1458 5183
Pievebovigliana MC 13 866 6049
Muccia MC 16 915 6964
Sarnano MC 17 3264 10228
Montemonaco AP 17 604 10832
Montefortino FM 17 1178 12010
Norcia PG 18 4957 16967
Sellano PG 18 1079 18046
Amandola FM 18 3629 21675
Serravalle di Chienti MC 20 1070 22745

Municipalities with at least 50000 inhabitants

An earthquake occurred to
35 Km E of Foligno (57155 inhabitants)
57 Km NW of Teramo (54892 inhabitants)
59 Km NE of Terni (111501 inhabitants)
63 Km E of Perugia (166134 inhabitants)
70 Km NW of L'Aquila (69753 inhabitants)
80 Km SW of Ancona (100861 inhabitants)
96 Km NW of Montesilvano (53738 inhabitants)
100 Km S of Fano (60888 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 1.7 2023-04-25
17:21:31		 42.9522 13.1343 8 2024-03-01
17:18:05		 Bollettino Sismico Italiano INGV 116795031
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-04-25 17:21:31 ± 0.05
Latitude 42.9522 ± 0.0027
Longitude 13.1343 ± 0.0037
Depth (km) 8 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 116795031

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 316
Semi-minor axis of confidence ellipse (meter) 191
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 49
Circular confidence region, given by single value of horizontal uncertainty (meter) 320.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 36
Number of associated phases, regardless of their use for origin computation 59
Number of defining phases 58
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.28
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.72845
Number of stations at which the event was observed 32
Number of stations from which data was used for origin computation 31
Magnitude information

ML:1.7

Field Value
Value 1.7
Uncertainty 0.2
Num. used stations 40
Type of magnitude ML
Reference to an origin 116795031
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2023-04-27 09:02:41
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.RCAV.EHE. 2023-04-25T17:21:54.98 3.0 undecidable manual P 2.14 0
IV.MURB.HHZ. 2023-04-25T17:21:51.98 0.6 undecidable manual S 305 60.1953 50 1.52 26
IV.TERO.HHZ. 2023-04-25T17:21:48.56 0.6 undecidable manual S 134 52.9026 50 0.06 47
IV.RM33.EHZ. 2023-04-25T17:21:48.00 0.6 undecidable manual S 172 49.617 50 0.38 44
IV.ATCC.EHZ. 2023-04-25T17:21:47.81 0.6 undecidable manual S 303 47.7189 50 0.7 40
IV.CING.HHZ. 2023-04-25T17:21:47.09 0.6 undecidable manual S 6 47.2194 50 0.1 47
IV.MNTT.EHZ. 2023-04-25T17:21:46.30 0.6 undecidable manual S 72 39.3273 50 1.41 29
IV.LNSS.HHZ. 2023-04-25T17:21:45.37 0.6 undecidable manual S 191 39.5271 50 0.45 44
IV.EL6.EHZ. 2023-04-25T17:21:45.60 0.3 undecidable manual S 356 41.9247 50 0.03 72
IV.PIEI.HHZ. 2023-04-25T17:21:45.65 0.3 undecidable manual P 323 80.8635 50 0.1 66
IV.ASSB.HHZ. 2023-04-25T17:21:45.06 0.6 undecidable manual S 285 39.8268 50 0.04 48
IV.GAVE.EHZ. 2023-04-25T17:21:44.03 0.6 undecidable manual S 214 34.8429 50 0.35 46
IV.SNTG.HHZ. 2023-04-25T17:21:44.07 0.6 undecidable manual S 335 37.0296 50 -0.21 47
IV.ATVO.HHZ. 2023-04-25T17:21:44.69 0.3 undecidable manual P 309 75.7686 50 -0.07 67
IV.SMA1.EHZ. 2023-04-25T17:21:44.76 0.6 undecidable manual S 155 39.2274 50 -0.1 48
IV.GIGS.HHZ. 2023-04-25T17:21:43.00 0.3 undecidable manual P 147 65.8896 50 -0.24 66
IV.MURB.HHZ. 2023-04-25T17:21:42.34 0.3 undecidable manual P 305 60.1953 50 -0.03 70
IV.MTRA.EHE. 2023-04-25T17:21:42.11 0.6 undecidable manual S 135 30.4473 105 -0.15 48
IV.SAP2.EHN. 2023-04-25T17:21:41.87 0.6 undecidable manual S 53 26.8509 107 0.81 39
IV.MF5.EHZ. 2023-04-25T17:21:41.81 0.3 undecidable manual S 81 26.751 107 0.78 60
IV.ATCC.EHZ. 2023-04-25T17:21:40.40 0.3 undecidable manual P 303 47.7189 50 -0.03 71
IV.TERO.HHZ. 2023-04-25T17:21:40.86 0.3 undecidable manual P 134 52.9026 50 -0.38 66
IV.RM33.EHZ. 2023-04-25T17:21:40.46 0.3 undecidable manual P 172 49.617 50 -0.27 68
IV.MOMA.HHZ. 2023-04-25T17:21:40.43 0.3 undecidable manual P 250 48.7179 50 -0.17 69
IV.ASSB.HHZ. 2023-04-25T17:21:39.00 0.1 negative manual P 285 39.8268 50 -0.23 93
IV.CING.HHZ. 2023-04-25T17:21:39.90 0.3 undecidable manual P 6 47.2194 50 -0.47 65
IV.CESI.HHZ. 2023-04-25T17:21:39.02 0.6 undecidable manual S 288 19.5693 113 0.33 47
IV.PF6.EHN. 2023-04-25T17:21:39.02 0.6 undecidable manual S 13 21.1677 112 -0.19 48
IV.GUMA.HHZ. 2023-04-25T17:21:39.63 0.6 undecidable manual S 53 20.3685 112 0.67 42
IV.EL6.EHZ. 2023-04-25T17:21:39.07 0.1 undecidable manual P 356 41.9247 50 -0.48 88
IV.MML1.EHZ. 2023-04-25T17:21:39.27 0.6 undecidable manual S 324 22.2555 111 -0.29 47
IV.MNTT.EHZ. 2023-04-25T17:21:39.72 0.3 undecidable manual P 72 39.3273 50 0.57 64
IV.SMA1.EHZ. 2023-04-25T17:21:38.73 0.3 undecidable manual P 155 39.2274 50 -0.4 67
IV.LNSS.HHZ. 2023-04-25T17:21:38.93 0.3 undecidable manual P 191 39.5271 50 -0.24 69
IV.GAVE.EHZ. 2023-04-25T17:21:38.37 0.1 undecidable manual P 214 34.8429 50 -0.08 96
IV.SNTG.HHZ. 2023-04-25T17:21:38.39 0.3 undecidable manual P 335 37.0296 50 -0.41 67
IV.MMO1.EHE. 2023-04-25T17:21:37.65 0.6 undecidable manual S 110 16.6722 117 -0.15 49
IV.MTRA.EHE. 2023-04-25T17:21:37.33 0.3 undecidable manual P 135 30.4473 105 -0.31 70
IV.NRCA.HHZ. 2023-04-25T17:21:37.38 0.6 undecidable manual S 187 13.2756 122 0.63 44
IV.SAP2.EHN. 2023-04-25T17:21:37.07 0.3 undecidable manual P 53 26.8509 107 0.13 73
7F.SIB2.EHE. 2023-04-25T17:21:37.08 0.6 undecidable manual S 116 15.3735 119 -0.3 48
IV.CSP1.EHZ. 2023-04-25T17:21:37.33 0.6 undecidable manual S 20 16.4724 117 -0.41 46
IV.MF5.EHZ. 2023-04-25T17:21:37.12 0.1 undecidable manual P 81 26.751 107 0.2 96
7F.SIB3.EHN. 2023-04-25T17:21:36.64 0.6 undecidable manual S 128 13.9749 121 -0.32 48
IT.MTCL.HGZ. 2023-04-25T17:21:36.51 0.6 undecidable manual S 293 11.877 125 0.16 49
IV.FDMO.HHZ. 2023-04-25T17:21:35.60 0.6 undecidable manual S 338 10.0788 130 -0.26 49
IV.MML1.EHZ. 2023-04-25T17:21:35.98 0.1 undecidable manual P 324 22.2555 111 -0.09 98
IV.CESI.HHZ. 2023-04-25T17:21:35.79 0.1 negative manual P 288 19.5693 113 0.22 96
IV.PF6.EHN. 2023-04-25T17:21:35.61 0.1 undecidable manual P 13 21.1677 112 -0.27 95
IV.FEMA.HNZ. 2023-04-25T17:21:35.32 0.6 undecidable manual S 279 6.993 140 0.24 49
IV.GUMA.HHZ. 2023-04-25T17:21:35.83 0.1 undecidable manual P 53 20.3685 112 0.1 99
7F.SIB2.EHE. 2023-04-25T17:21:34.66 0.1 undecidable manual P 116 15.3735 119 -0.16 98
IV.CSP1.EHZ. 2023-04-25T17:21:34.87 0.1 positive manual P 20 16.4724 117 -0.15 98
IV.MMO1.EHE. 2023-04-25T17:21:34.95 0.1 undecidable manual P 110 16.6722 117 -0.11 99
7F.SIB3.EHN. 2023-04-25T17:21:34.43 0.1 undecidable manual P 128 13.9749 121 -0.14 99
IV.NRCA.HHZ. 2023-04-25T17:21:34.66 0.1 negative manual P 187 13.2756 122 0.21 98
IT.MTCL.HGZ. 2023-04-25T17:21:34.33 0.1 undecidable manual P 293 11.877 125 0.1 100
IV.FEMA.HNZ. 2023-04-25T17:21:33.72 0.1 undecidable manual P 279 6.993 140 0.23 98
IV.FDMO.HHZ. 2023-04-25T17:21:33.80 0.1 positive manual P 338 10.0788 130 -0.14 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FEMA.HNN. ML:2.2 0.00264 0.24 AML other m 2023-04-25T17:21:35.70
IV.FEMA.HNE. ML:2.3 0.0036450000000000007 0.5 AML other m 2023-04-25T17:21:35.55
IV.FDMO.HHE. ML:1.8 0.0009695 0.5 AML other m 2023-04-25T17:21:36.18
IV.FDMO.HHN. ML:1.8 0.0009025000000000001 1.08 AML other m 2023-04-25T17:21:36.15
IV.MMO1.EHN. ML:1.8 0.0005625 0.28 AML other m 2023-04-25T17:21:38.00
IV.NRCA.HHE. ML:2.0 0.001185 0.34 AML other m 2023-04-25T17:21:38.39
IV.NRCA.HNE. ML:2.0 0.001107 0.34 AML other m 2023-04-25T17:21:38.40
IV.NRCA.HNN. ML:1.8 0.000846 0.56 AML other m 2023-04-25T17:21:38.46
IV.CSP1.EHE. ML:1.8 0.0006405000000000001 0.48 AML other m 2023-04-25T17:21:38.53
IV.MMO1.EHE. ML:1.6 0.00040849999999999995 0.34 AML other m 2023-04-25T17:21:38.89
IV.NRCA.HHN. ML:1.9 0.0009324999999999998 0.92 AML other m 2023-04-25T17:21:38.84
IV.CSP1.EHN. ML:1.9 0.0008365 1.6 AML other m 2023-04-25T17:21:39.95
IV.CESI.HHN. ML:2.0 0.0007265 0.28 AML other m 2023-04-25T17:21:39.54
IV.CESI.HHE. ML:1.7 0.00043100000000000007 0.34 AML other m 2023-04-25T17:21:39.58
IV.GUMA.HHN. ML:1.8 0.0005064999999999999 1.58 AML other m 2023-04-25T17:21:41.92
IV.MML1.EHE. ML:1.5 0.0002155 0.4 AML other m 2023-04-25T17:21:41.12
IV.MML1.HNN. ML:1.7 0.000334 0.44 AML other m 2023-04-25T17:21:41.74
IV.MML1.EHN. ML:1.7 0.0003205 0.44 AML other m 2023-04-25T17:21:41.74
IV.MML1.HNE. ML:1.6 0.00027550000000000003 0.54 AML other m 2023-04-25T17:21:42.53
IV.SAP2.EHE. ML:1.5 0.000187 0.9 AML other m 2023-04-25T17:21:43.75
IV.GAVE.EHN. ML:1.7 0.00022250000000000001 0.52 AML other m 2023-04-25T17:21:44.85
IV.SAP2.EHN. ML:2.2 0.000885 1.38 AML other m 2023-04-25T17:21:45.70
IV.GAVE.EHE. ML:1.7 0.0002045 0.84 AML other m 2023-04-25T17:21:45.32
IV.ASSB.HHE. ML:1.6 0.0001475 0.24 AML other m 2023-04-25T17:21:45.41
IV.ASSB.HHN. ML:1.6 0.000152 0.22 AML other m 2023-04-25T17:21:45.47
IV.GUMA.HHE. ML:1.7 0.000374 0.6 AML other m 2023-04-25T17:21:47.25
IV.CING.HHN. ML:1.4 0.00007205 0.42 AML other m 2023-04-25T17:21:47.24
IV.LNSS.HHN. ML:1.4 0.0000981 0.3 AML other m 2023-04-25T17:21:47.66
IV.CING.HHE. ML:1.4 0.00007935 1.44 AML other m 2023-04-25T17:21:48.22
IV.SMA1.EHE. ML:1.4 0.00009025 0.42 AML other m 2023-04-25T17:21:49.17
IV.ATCC.EHE. ML:1.6 0.00011399999999999999 1.36 AML other m 2023-04-25T17:21:49.19
IV.SMA1.EHN. ML:1.4 0.0000804 0.88 AML other m 2023-04-25T17:21:49.57
IV.TERO.HHN. ML:1.5 0.00007714999999999999 0.72 AML other m 2023-04-25T17:21:49.98
IV.ATCC.EHN. ML:1.7 0.000129 0.86 AML other m 2023-04-25T17:21:49.33
IV.LNSS.HHE. ML:1.4 0.00009495 1.42 AML other m 2023-04-25T17:21:49.12
IV.MOMA.HHE. ML:1.3 0.00005685 0.44 AML other m 2023-04-25T17:21:49.88
IV.TERO.HHE. ML:1.5 0.00007865 1.3 AML other m 2023-04-25T17:21:50.79
IV.MOMA.HHN. ML:1.2 0.000037900000000000006 1.16 AML other m 2023-04-25T17:21:54.00
IV.MURB.HHN. ML:1.7 0.00010994999999999999 0.42 AML other m 2023-04-25T17:21:54.64
IV.MURB.HHE. ML:1.7 0.0001115 0.76 AML other m 2023-04-25T17:21:55.67
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