Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.3 on date 21-11-2020 and time 09:59:24 (UTC) in region 6 km SW Serra Sant'Abbondio (PU)

A magnitude ML 1.3 earthquake occured in region: 6 km SW Serra Sant'Abbondio (PU), on

  • 21-11-2020 09:59:24 (UTC)
  • 21-11-2020 10:59:24 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.4660, 12.7110 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 6 1027 1027
Frontone PU 6 1300 2327
Cantiano PU 7 2245 4572
Scheggia e Pascelupo PG 8 1393 5965
Cagli PU 10 8731 14696
Costacciaro PG 12 1216 15912
Sassoferrato AN 13 7285 23197
Pergola PU 15 6333 29530
Sigillo PG 15 2404 31934
Gubbio PG 16 32216 64150
Acqualagna PU 17 4393 68543
Genga AN 19 1797 70340
Arcevia AN 19 4612 74952
Fossato di Vico PG 20 2840 77792

Municipalities with at least 50000 inhabitants

An earthquake occurred to
48 Km NE of Perugia (166134 inhabitants)
49 Km SW of Fano (60888 inhabitants)
52 Km SW of Pesaro (94582 inhabitants)
57 Km N of Foligno (57155 inhabitants)
67 Km E of Arezzo (99543 inhabitants)
67 Km S of Rimini (147750 inhabitants)
67 Km W of Ancona (100861 inhabitants)
84 Km SE of Cesena (96758 inhabitants)
100 Km SE of Forlì (117913 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 1.3 2020-11-21
09:59:24		 43.4663 12.7107 15 2020-11-21
10:08:52		 Sala Sismica INGV-Roma 84907151
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-11-21 09:59:24 ± 0.05
Latitude 43.4663 ± 0.0018
Longitude 12.7107 ± 0.0050
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 84907151

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 372
Semi-minor axis of confidence ellipse (meter) 228
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 274
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) 142
Number of associated phases, regardless of their use for origin computation 13
Number of defining phases 13
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.07
Epicentral distance of station closest to the epicenter (degree) 0.05216
Epicentral distance of station farthest from the epicenter (degree) 0.51891
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:1.3

Field Value
Value 1.3
Uncertainty 0.1
Num. used stations 4
Type of magnitude ML
Reference to an origin 84907151
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-11-21 10:08:52
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CSP1.EHZ. 2020-11-21T09:59:35.45 1.0 positive manual P 136 57.5979 94 0.41 22
IV.ASSB.HHZ. 2020-11-21T09:59:33.43 0.1 undecidable manual P 185 47.2194 96 -0.01 96
IV.ARVD.HHZ. 2020-11-21T09:59:32.38 0.6 undecidable manual S 79 18.87 114 -0.06 50
IV.MPAG.EHZ. 2020-11-21T09:59:32.38 0.6 undecidable manual S 12 18.4704 114 0.04 50
IV.NARO.HHZ. 2020-11-21T09:59:32.46 0.6 undecidable manual S 327 19.1697 113 -0.04 50
IV.FOSV.EHZ. 2020-11-21T09:59:32.64 0.6 undecidable manual S 168 19.4694 113 0.07 50
IV.SNTG.HHZ. 2020-11-21T09:59:30.77 0.6 positive manual P 142 29.8479 101 -0.03 49
IV.NARO.HHZ. 2020-11-21T09:59:29.16 0.3 undecidable manual P 327 19.1697 113 -0.05 76
IV.FOSV.EHZ. 2020-11-21T09:59:29.19 0.1 positive manual P 168 19.4694 113 -0.06 100
IV.ARVD.HHZ. 2020-11-21T09:59:29.10 1.0 negative manual P 79 18.87 114 -0.08 25
IV.MPAG.EHZ. 2020-11-21T09:59:29.16 0.3 undecidable manual P 12 18.4704 114 0.04 75
IV.FRON.EHZ. 2020-11-21T09:59:29.87 0.6 undecidable manual S 12 5.7942 153 0.02 51
IV.FRON.EHZ. 2020-11-21T09:59:27.63 1.0 undecidable manual P 12 5.7942 153 -0.05 26
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FRON.EHE. ML:1.1 0.00015475 1.56 AML other m 2020-11-21T09:59:29.90
IV.FRON.EHN. ML:1.4 0.0002545 0.78 AML other m 2020-11-21T09:59:29.97
IV.MPAG.EHE. ML:1.4 0.00017449999999999999 0.76 AML other m 2020-11-21T09:59:33.18
IV.MPAG.EHN. ML:1.4 0.000167 0.42 AML other m 2020-11-21T09:59:33.66
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