Earthquake with magnitude of ML 0.5 on date 25-11-2021 and time 03:59:33 (Italy) 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) 43.417, 12.805 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.

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
Frontone PU 12 1300 16422
Fabriano AN 12 31480 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
Preliminary map of the earthquake effects from the web questionnaire

Preliminary map of the earthquake effects from the web questionnaire

This map shows the distribution of earthquake resentment in the area, expressed in terms of intensity on the MCS scale (Mercalli-Cancani-Sieberg). Intensities are determined using data from questionnaires collected on the website http://www.hsit.it. The intensities shown are determined considering all the reports received from each municipality, and are all the more reliable the greater the number of questionnaires. The collected data are subjected to an automatic statistical filter, but are not checked individually. In particular, intensities greater than or equal to the VI degree of the MCS or EMS scale require on-site verification by specialized personnel. The black star is the epicenter of the earthquake that occurred. This map is updated every time citizens fill out new questionnaires. The number of questionnaires processed to obtain this map, the date and time of the last update are shown at the top right.
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
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 Takeoff_angle Residual Weight
IV.ATLO.EHZ. 2021-11-25T02:59:45.44 0.6 undecidable manual S 251 0.3067 97 0.42 44
IV.ATPI.HNZ. 2021-11-25T02:59:45.01 0.6 undecidable manual S 277 0.2941 97 0.35 45
IV.ATVO.HHZ. 2021-11-25T02:59:44.65 0.6 undecidable manual S 263 0.2914 98 0.08 48
IV.PIEI.HHZ. 2021-11-25T02:59:42.52 0.6 undecidable manual S 301 0.2284 101 -0.22 46
IV.SNTG.HHZ. 2021-11-25T02:59:41.38 0.6 undecidable manual S 149 0.1898 106 -0.24 47
IV.ATLO.EHZ. 2021-11-25T02:59:40.25 0.1 undecidable manual P 251 0.3067 97 0.13 93
IV.ATPI.HNZ. 2021-11-25T02:59:39.85 0.1 undecidable manual P 277 0.2941 97 -0.06 95
IV.ATCC.HNZ. 2021-11-25T02:59:39.21 0.1 undecidable manual P 207 0.2617 99 -0.15 94
IV.FRON.EHZ. 2021-11-25T02:59:39.63 0.6 undecidable manual S 330 0.116 124 0.01 50
IV.MURB.HNZ. 2021-11-25T02:59:39.49 0.1 undecidable manual P 233 0.2554 99 0.23 92
IV.ATVO.HHZ. 2021-11-25T02:59:39.79 0.1 undecidable manual P 263 0.2914 98 -0.08 95
IV.FOSV.EHZ. 2021-11-25T02:59:39.75 0.6 undecidable manual S 195 0.1268 121 -0.15 48
IV.TB01.DHZ.01 2021-11-25T02:59:39.47 0.1 undecidable manual P 263 0.2707 99 -0.05 96
IV.ARVD.HHZ. 2021-11-25T02:59:39.92 0.6 undecidable manual S 51 0.1277 120 0 49
IV.MPAG.EHZ. 2021-11-25T02:59:38.45 0.1 undecidable manual P 351 0.214 103 -0.12 96
IV.SNTG.HHZ. 2021-11-25T02:59:38.27 0.6 positive manual P 149 0.1898 106 0.11 48
IV.SSFR.HHZ. 2021-11-25T02:59:38.08 0.6 undecidable manual S 319 0.0252 166 0.02 50
IV.PIEI.HHZ. 2021-11-25T02:59:38.75 0.6 undecidable manual P 301 0.2284 101 -0.06 48
IV.ATSC.EHZ. 2021-11-25T02:59:38.95 0.6 undecidable manual S 274 0.0863 136 -0.01 49
IV.FOSV.EHZ. 2021-11-25T02:59:37.18 0.3 undecidable manual P 195 0.1268 121 0.01 74
IV.ARVD.HHZ. 2021-11-25T02:59:37.34 0.1 undecidable manual P 51 0.1277 120 0.16 95
IV.FRON.EHZ. 2021-11-25T02:59:37.08 0.1 undecidable manual P 330 0.116 124 0.07 98
IV.SSFR.HHZ. 2021-11-25T02:59:36.18 0.1 undecidable manual P 319 0.0252 166 0.07 100
IV.ATSC.EHZ. 2021-11-25T02:59:36.25 0.1 undecidable manual P 274 0.0863 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 2.6261955E-5 0.1392 AML other m 2021-11-25T02:59:39.80
IV.FRON.EHE. ML:0.3 1.7940775E-5 0.1008 AML other m 2021-11-25T02:59:40.09
IV.FOSV.HNE. ML:0.7 3.830438E-5 0.1904 AML other m 2021-11-25T02:59:39.87
IV.FOSV.HNN. ML:0.8 5.46946E-5 0.28 AML other m 2021-11-25T02:59:39.89
IV.FOSV.EHE. ML:0.5 2.867181E-5 0.0608 AML other m 2021-11-25T02:59:39.90
IV.FOSV.EHN. ML:0.5 3.167362E-5 0.08 AML other m 2021-11-25T02:59:39.89
IV.ARVD.HHE. ML:0.1 1.0929162E-5 0.0608 AML other m 2021-11-25T02:59:40.80
IV.ARVD.HHN. ML:0.2 1.35078835E-5 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