Earthquake with magnitude of ML 0.3 on date 20-09-2020 and time 20:36:51 (Italy) in region 6 km SW Frontone (PU)

A magnitude ML 0.3 earthquake occured in region: 6 km SW Frontone (PU), on

  • 20-09-2020 18:36:51 (UTC)
  • 20-09-2020 20:36:51 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.47, 12.71 at 13 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
Frontone PU 6 1300 1300
Serra Sant'Abbondio PU 6 1027 2327
Cantiano PU 6 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 16 2404 31934
Acqualagna PU 17 4393 36327
Gubbio PG 17 32216 68543
Genga AN 19 1797 70340
Arcevia AN 19 4612 74952

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)
68 Km W of Ancona (100861 inhabitants)
83 Km SE of Cesena (96758 inhabitants)
99 Km SE of Forlì (117913 inhabitants)
Recent and historical Seismicity
Seismic hazard
Shakemap
Felt maps
The earthquake effects in MCS scale as obtained from the compiled questionnaire

The earthquake effects in MCS scale as obtained from the compiled questionnaire

This map shows the distribution of the effects of the earthquake on the territory in terms of the MCS (Mercalli-Cancani-Sieberg) intensity scale. The intensities are determined using the data provided in the questionnaire (http://www.haisentitoilterremoto.it/) that are analysed using robust statistical techniques since they are not verified individually. Specifically, the assignment of MCS intensities greater or equal the VI degree of the MCS scale require opportune in situ verification by professional experts. The purple start shows the epicenter. This map is prepared every so often that the population fill in new questionnaires. The number of questionnaires used to determine the map and the date and time of the last adjournment are shown in the upper right part of the panel.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100
ML 0.3 2020-09-20
18:36:51
43.47 12.71 13 2020-09-20
18:48:11
Sala Sismica INGV-Roma 83075621
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-09-20 18:36:51 ± 0.04
Latitude 43.47 ± 0.00
Longitude 12.71 ± 0.00
Depth (km) 13 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 83075621

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 270
Semi-minor axis of confidence ellipse (meter) 27
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 347
Circular confidence region, given by single value of horizontal uncertainty (meter) 270
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 81
Number of associated phases, regardless of their use for origin computation 18
Number of defining phases 17
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.1
Epicentral distance of station closest to the epicenter (degree) 0.04766
Epicentral distance of station farthest from the epicenter (degree) 0.32016
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 9
Magnitude information

ML:0.3

Field Value
Value 0.3
Uncertainty 0.1
Num. used stations 8
Type of magnitude ML
Reference to an origin 83075621
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-09-20 18:48:11
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.EL6.EHE. 2020-09-20T18:37:04.16 0.3 undecidable manual S 116 0.3202 96 0.24 67
IV.ATPI.EHZ. 2020-09-20T18:37:01.07 0.3 undecidable manual S 265 0.2221 101 0.03 72
IV.ATVO.HHZ. 2020-09-20T18:37:01.60 0.3 undecidable manual S 248 0.2356 100 0.17 70
IV.ARVD.HHZ. 2020-09-20T18:36:59.53 0.3 undecidable manual S 81 0.1727 108 -0.08 72
IV.MPAG.EHZ. 2020-09-20T18:36:59.36 0.3 undecidable manual S 14 0.1619 110 0.04 73
IV.NARO.HHZ. 2020-09-20T18:36:59.49 0.3 undecidable manual S 327 0.1664 109 0.05 73
IV.ATFO.HHZ. 2020-09-20T18:36:58.79 0.6 undecidable manual S 223 0.1439 114 -0.03 49
IV.EL6.EHE. 2020-09-20T18:36:58.48 3.0 undecidable manual P 116 0.3202 96 -0.38 0
IV.ATVO.HHZ. 2020-09-20T18:36:57.33 0.1 undecidable manual P 248 0.2356 100 -0.1 95
IV.ATPI.EHZ. 2020-09-20T18:36:57.20 0.3 undecidable manual P 265 0.2221 101 0.01 73
IV.ATSC.EHZ. 2020-09-20T18:36:56.79 0.3 undecidable manual S 197 0.0495 152 0.02 74
IV.NARO.HHZ. 2020-09-20T18:36:56.24 0.6 undecidable manual P 327 0.1664 109 -0.04 48
IV.FRON.EHZ. 2020-09-20T18:36:56.85 0.3 undecidable manual S 17 0.0477 153 0.11 73
IV.ARVD.HHZ. 2020-09-20T18:36:56.19 0.3 undecidable manual P 81 0.1727 108 -0.18 71
IV.MPAG.EHZ. 2020-09-20T18:36:56.26 0.3 undecidable manual P 14 0.1619 110 0.05 73
IV.ATFO.HHZ. 2020-09-20T18:36:55.77 0.3 undecidable manual P 223 0.1439 114 -0.14 72
IV.ATSC.EHZ. 2020-09-20T18:36:54.66 0.1 undecidable manual P 197 0.0495 152 -0.07 99
IV.FRON.EHZ. 2020-09-20T18:36:54.72 0.1 undecidable manual P 17 0.0477 153 0 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FRON.EHN. ML:0.4 2.9777245E-5 0.064 AML other m 2020-09-20T18:36:57.44
IV.FRON.EHE. ML:0.2 2.1432075E-5 0.064 AML other m 2020-09-20T18:36:57.30
IV.ATFO.HHE. ML:0.4 1.917436E-5 0.2048 AML other m 2020-09-20T18:37:00.10
IV.ATFO.HHN. ML:0.4 1.8064295E-5 0.1408 AML other m 2020-09-20T18:36:59.58
IV.ARVD.HHN. ML:0.3 1.54303105E-5 0.0896 AML other m 2020-09-20T18:36:59.64
IV.ARVD.HHE. ML:0.3 1.6813515E-5 0.1024 AML other m 2020-09-20T18:36:59.60
IV.NARO.HHN. ML:0.1 9.378126E-6 0.0768 AML other m 2020-09-20T18:36:59.89
IV.NARO.HHE. ML:0.1 1.245028E-5 0.064 AML other m 2020-09-20T18:36:59.74
IV.MPAG.EHN. ML:-0.2 6.9714923E-6 0.0768 AML other m 2020-09-20T18:36:59.88
IV.MPAG.EHE. ML:-0.2 7.4143215E-6 0.128 AML other m 2020-09-20T18:36:59.74
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download