Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.5 on date 25-11-2021 and time 02:59:33 (UTC) in region 5 km W Sassoferrato (AN)

A magnitude ML 0.5 earthquake occured in region: 5 km W Sassoferrato (AN), on

  • 25-11-2021 02:59:33 (UTC)
  • 25-11-2021 03:59:33 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.4170, 12.8050 at 14 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
Sassoferrato AN 5 7285 7285
Serra Sant'Abbondio PU 9 1027 8312
Costacciaro PG 10 1216 9528
Genga AN 11 1797 11325
Sigillo PG 11 2404 13729
Scheggia e Pascelupo PG 11 1393 15122
Fabriano AN 12 31480 46602
Frontone PU 12 1300 47902
Fossato di Vico PG 14 2840 50742
Arcevia AN 14 4612 55354
Cantiano PU 16 2245 57599
Pergola PU 17 6333 63932
Serra San Quirico AN 17 2850 66782
Cerreto d'Esi AN 18 3817 70599
Cagli PU 19 8731 79330
Gubbio PG 20 32216 111546
Mergo AN 20 1037 112583

Municipalities with at least 50000 inhabitants

An earthquake occurred to
48 Km NE of Perugia (166134 inhabitants)
51 Km SW of Fano (60888 inhabitants)
52 Km N of Foligno (57155 inhabitants)
56 Km S of Pesaro (94582 inhabitants)
62 Km W of Ancona (100861 inhabitants)
74 Km S of Rimini (147750 inhabitants)
75 Km E of Arezzo (99543 inhabitants)
92 Km SE of Cesena (96758 inhabitants)
96 Km N of Terni (111501 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 0.5 2021-11-25
02:59:33		 43.4173 12.805 14 2021-11-25
03:06:55		 Sala Sismica INGV-Roma 97770231
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-11-25 02:59:33 ± 0.08
Latitude 43.4173 ± 0.0027
Longitude 12.8050 ± 0.0050
Depth (km) 14 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 97770231

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 325
Semi-minor axis of confidence ellipse (meter) 252
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 244
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) 98
Number of associated phases, regardless of their use for origin computation 24
Number of defining phases 24
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.15
Epicentral distance of station closest to the epicenter (degree) 0.02518
Epicentral distance of station farthest from the epicenter (degree) 0.30667
Number of stations at which the event was observed 14
Number of stations from which data was used for origin computation 14
Magnitude information

ML:0.5

Field Value
Value 0.5
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 97770231
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-11-25 03:06:55
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ATLO.EHZ. 2021-11-25T02:59:45.44 0.6 undecidable manual S 251 34.0437 97 0.42 44
IV.ATPI.HNZ. 2021-11-25T02:59:45.01 0.6 undecidable manual S 277 32.6451 97 0.35 45
IV.ATVO.HHZ. 2021-11-25T02:59:44.65 0.6 undecidable manual S 263 32.3454 98 0.08 48
IV.PIEI.HHZ. 2021-11-25T02:59:42.52 0.6 undecidable manual S 301 25.3524 101 -0.22 46
IV.SNTG.HHZ. 2021-11-25T02:59:41.38 0.6 undecidable manual S 149 21.0678 106 -0.24 47
IV.ATLO.EHZ. 2021-11-25T02:59:40.25 0.1 undecidable manual P 251 34.0437 97 0.13 93
IV.FRON.EHZ. 2021-11-25T02:59:39.63 0.6 undecidable manual S 330 12.876 124 0.01 50
IV.MURB.HNZ. 2021-11-25T02:59:39.49 0.1 undecidable manual P 233 28.3494 99 0.23 92
IV.ATVO.HHZ. 2021-11-25T02:59:39.79 0.1 undecidable manual P 263 32.3454 98 -0.08 95
IV.FOSV.EHZ. 2021-11-25T02:59:39.75 0.6 undecidable manual S 195 14.0748 121 -0.15 48
IV.TB01.DHZ.01 2021-11-25T02:59:39.47 0.1 undecidable manual P 263 30.0477 99 -0.05 96
IV.ARVD.HHZ. 2021-11-25T02:59:39.92 0.6 undecidable manual S 51 14.1747 120 0 49
IV.ATPI.HNZ. 2021-11-25T02:59:39.85 0.1 undecidable manual P 277 32.6451 97 -0.06 95
IV.ATCC.HNZ. 2021-11-25T02:59:39.21 0.1 undecidable manual P 207 29.0487 99 -0.15 94
IV.SNTG.HHZ. 2021-11-25T02:59:38.27 0.6 positive manual P 149 21.0678 106 0.11 48
IV.SSFR.HHZ. 2021-11-25T02:59:38.08 0.6 undecidable manual S 319 2.7972 166 0.02 50
IV.PIEI.HHZ. 2021-11-25T02:59:38.75 0.6 undecidable manual P 301 25.3524 101 -0.06 48
IV.ATSC.EHZ. 2021-11-25T02:59:38.95 0.6 undecidable manual S 274 9.5793 136 -0.01 49
IV.MPAG.EHZ. 2021-11-25T02:59:38.45 0.1 undecidable manual P 351 23.754 103 -0.12 96
IV.FRON.EHZ. 2021-11-25T02:59:37.08 0.1 undecidable manual P 330 12.876 124 0.07 98
IV.FOSV.EHZ. 2021-11-25T02:59:37.18 0.3 undecidable manual P 195 14.0748 121 0.01 74
IV.ARVD.HHZ. 2021-11-25T02:59:37.34 0.1 undecidable manual P 51 14.1747 120 0.16 95
IV.SSFR.HHZ. 2021-11-25T02:59:36.18 0.1 undecidable manual P 319 2.7972 166 0.07 100
IV.ATSC.EHZ. 2021-11-25T02:59:36.25 0.1 undecidable manual P 274 9.5793 136 -0.37 92
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FRON.EHN. ML:0.4 0.000026261955 0.1392 AML other m 2021-11-25T02:59:39.80
IV.FRON.EHE. ML:0.3 0.000017940774999999998 0.1008 AML other m 2021-11-25T02:59:40.09
IV.FOSV.HNE. ML:0.7 0.00003830438 0.1904 AML other m 2021-11-25T02:59:39.87
IV.FOSV.HNN. ML:0.8 0.0000546946 0.28 AML other m 2021-11-25T02:59:39.89
IV.FOSV.EHE. ML:0.5 0.00002867181 0.0608 AML other m 2021-11-25T02:59:39.90
IV.FOSV.EHN. ML:0.5 0.00003167362 0.08 AML other m 2021-11-25T02:59:39.89
IV.ARVD.HHE. ML:0.1 0.000010929162 0.0608 AML other m 2021-11-25T02:59:40.80
IV.ARVD.HHN. ML:0.2 0.000013507883500000001 0.08 AML other m 2021-11-25T02:59:40.54
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