Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.1 on date 22-11-2020 and time 13:40:20 (UTC) in region 5 km SW Serra Sant'Abbondio (PU)

A magnitude ML 1.1 earthquake occured in region: 5 km SW Serra Sant'Abbondio (PU), on

  • 22-11-2020 13:40:20 (UTC)
  • 22-11-2020 14:40:20 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.4540, 12.7360 at 15 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
Serra Sant'Abbondio PU 5 1027 1027
Frontone PU 7 1300 2327
Scheggia e Pascelupo PG 8 1393 3720
Cantiano PU 9 2245 5965
Sassoferrato AN 10 7285 13250
Costacciaro PG 11 1216 14466
Cagli PU 13 8731 23197
Sigillo PG 14 2404 25601
Pergola PU 15 6333 31934
Genga AN 16 1797 33731
Gubbio PG 17 32216 65947
Arcevia AN 17 4612 70559
Fossato di Vico PG 18 2840 73399
Acqualagna PU 19 4393 77792
Fabriano AN 19 31480 109272

Municipalities with at least 50000 inhabitants

An earthquake occurred to
48 Km NE of Perugia (166134 inhabitants)
49 Km SW of Fano (60888 inhabitants)
53 Km S of Pesaro (94582 inhabitants)
55 Km N of Foligno (57155 inhabitants)
66 Km W of Ancona (100861 inhabitants)
69 Km E of Arezzo (99543 inhabitants)
69 Km S of Rimini (147750 inhabitants)
86 Km SE of Cesena (96758 inhabitants)
100 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 1.1 2020-11-22
13:40:20		 43.4543 12.7357 15 2020-11-22
13:49:42		 Sala Sismica INGV-Roma 84945211
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-11-22 13:40:20 ± 0.11
Latitude 43.4543 ± 0.0036
Longitude 12.7357 ± 0.0062
Depth (km) 15 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 84945211

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 453
Semi-minor axis of confidence ellipse (meter) 120
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 277
Circular confidence region, given by single value of horizontal uncertainty (meter) 450.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 68
Number of associated phases, regardless of their use for origin computation 16
Number of defining phases 16
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) 0.03867
Epicentral distance of station farthest from the epicenter (degree) 0.19245
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 8
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.3
Num. used stations 8
Type of magnitude ML
Reference to an origin 84945211
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-11-22 13:49:42
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.NARO.HHZ. 2020-11-22T13:40:28.41 0.3 undecidable manual S 324 21.3675 111 -0.24 69
IV.MPAG.EHZ. 2020-11-22T13:40:28.16 0.3 undecidable manual S 6 19.4694 114 -0.02 72
IV.ATBU.EHE. 2020-11-22T13:40:27.63 0.3 undecidable manual S 279 15.2736 123 0.44 67
IV.FOSV.EHZ. 2020-11-22T13:40:27.84 0.6 undecidable manual S 173 17.871 117 0.06 48
IV.ARVD.HHZ. 2020-11-22T13:40:27.74 0.3 undecidable manual S 74 17.2716 118 0.09 73
IV.MPAG.EHZ. 2020-11-22T13:40:25.16 0.6 undecidable manual P 6 19.4694 114 0.31 46
IV.FRON.EHZ. 2020-11-22T13:40:25.52 0.3 undecidable manual S 354 7.0929 149 -0.14 72
IV.SSFR.HHZ. 2020-11-22T13:40:25.31 0.1 undecidable manual S 118 4.2957 161 -0.03 100
IV.ATSC.EHN. 2020-11-22T13:40:25.41 0.3 undecidable manual S 230 5.1948 157 -0.02 75
IV.NARO.HHZ. 2020-11-22T13:40:24.87 0.3 undecidable manual P 324 21.3675 111 -0.24 70
IV.ATBU.EHE. 2020-11-22T13:40:24.37 0.1 undecidable manual P 279 15.2736 123 0.1 96
IV.FOSV.EHZ. 2020-11-22T13:40:24.52 0.1 positive manual P 173 17.871 117 -0.09 97
IV.ARVD.HHZ. 2020-11-22T13:40:24.82 0.3 undecidable manual P 74 17.2716 118 0.28 70
IV.SSFR.HHZ. 2020-11-22T13:40:23.17 0.1 undecidable manual P 118 4.2957 161 -0.03 100
IV.ATSC.EHN. 2020-11-22T13:40:23.19 0.1 undecidable manual P 230 5.1948 157 -0.06 100
IV.FRON.EHZ. 2020-11-22T13:40:23.30 0.1 negative manual P 354 7.0929 149 -0.09 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SSFR.HHE. ML:1.1 0.0001427528 0.1152 AML other m 2020-11-22T13:40:25.82
IV.SSFR.HHN. ML:1.3 0.00023851245000000001 0.1984 AML other m 2020-11-22T13:40:25.38
IV.SSFR.HNE. ML:1.4 0.00028358385 0.0512 AML other m 2020-11-22T13:40:25.55
IV.SSFR.HNN. ML:1.6 0.00040299995 0.0576 AML other m 2020-11-22T13:40:25.38
IV.FOSV.EHE. ML:0.9 0.000056583430000000007 2.1824 AML other m 2020-11-22T13:40:27.80
IV.FOSV.EHN. ML:0.6 0.000024085075 0.1408 AML other m 2020-11-22T13:40:28.12
IV.MPAG.EHE. ML:1.0 0.00006915752499999999 1.8176 AML other m 2020-11-22T13:40:27.24
IV.MPAG.EHN. ML:0.9 0.00004851903 1.8816 AML other m 2020-11-22T13:40:31.01
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