Earthquake with magnitude of ML 0.0 on date 21-08-2020 and time 03:48:14 (Italy) in region 4 km N Sassoferrato (AN)

A magnitude ML 0.0 earthquake occured in region: 4 km N Sassoferrato (AN), on

  • 21-08-2020 01:48:14 (UTC)
  • 21-08-2020 03:48:14 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.47, 12.86 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 4 7285 7285
Arcevia AN 7 4612 11897
Genga AN 8 1797 13694
Serra Sant'Abbondio PU 8 1027 14721
Pergola PU 11 6333 21054
Frontone PU 11 1300 22354
Serra San Quirico AN 13 2850 25204
Mergo AN 14 1037 26241
Fabriano AN 15 31480 57721
Serra de' Conti AN 16 3746 61467
San Lorenzo in Campo PU 16 3414 64881
Rosora AN 17 1985 66866
Scheggia e Pascelupo PG 17 1393 68259
Costacciaro PG 17 1216 69475
Montecarotto AN 18 1987 71462
Castelleone di Suasa AN 18 1676 73138
Castelplanio AN 18 3540 76678
Poggio San Marcello AN 18 693 77371
Barbara AN 18 1368 78739
Sigillo PG 18 2404 81143
Fratte Rosa PU 18 966 82109
Cantiano PU 19 2245 84354
Cagli PU 19 8731 93085
Cerreto d'Esi AN 19 3817 96902

Municipalities with at least 50000 inhabitants

An earthquake occurred to
44 Km SW of Fano (60888 inhabitants)
49 Km S of Pesaro (94582 inhabitants)
56 Km W of Ancona (100861 inhabitants)
56 Km NE of Perugia (166134 inhabitants)
59 Km N of Foligno (57155 inhabitants)
70 Km SE of Rimini (147750 inhabitants)
79 Km E of Arezzo (99543 inhabitants)
89 Km SE of Cesena (96758 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 0.0 2020-08-21
01:48:14
43.47 12.86 14 2020-08-21
01:56:51
Sala Sismica INGV-Roma 82186841
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-08-21 01:48:14 ± 0.07
Latitude 43.47 ± 0.00
Longitude 12.86 ± 0.01
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 82186841

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 360
Semi-minor axis of confidence ellipse (meter) 48
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 76
Circular confidence region, given by single value of horizontal uncertainty (meter) 360
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 100
Number of associated phases, regardless of their use for origin computation 18
Number of defining phases 18
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.12
Epicentral distance of station closest to the epicenter (degree) 0.06385
Epicentral distance of station farthest from the epicenter (degree) 0.24641
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

Field Value
Value 0
Uncertainty 0.1
Num. used stations 10
Type of magnitude ML
Reference to an origin 82186841
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-08-21 01:56:51
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.NARO.HHZ. 2020-08-21T01:48:24.79 0.3 undecidable manual S 305 0.2464 101 0.17 70
IV.PIEI.HHZ. 2020-08-21T01:48:24.46 0.3 undecidable manual S 285 0.2455 101 -0.12 71
IV.SNTG.HHN. 2020-08-21T01:48:23.93 0.3 undecidable manual S 165 0.223 103 -0.01 73
IV.MPAG.HNN. 2020-08-21T01:48:22.58 0.3 undecidable manual S 335 0.1745 110 0.02 74
IV.FOSV.EHZ. 2020-08-21T01:48:22.89 0.3 undecidable manual S 202 0.1907 107 -0.1 72
IV.ATSC.EHE. 2020-08-21T01:48:21.55 0.3 undecidable manual S 250 0.1349 120 0.06 74
IV.SNTG.HHN. 2020-08-21T01:48:20.52 0.6 undecidable manual P 165 0.223 103 0.46 44
IV.PIEI.HHZ. 2020-08-21T01:48:20.26 1.0 positive manual P 285 0.2455 101 -0.17 23
IV.SSFR.HHE. 2020-08-21T01:48:20.02 0.3 undecidable manual S 239 0.0665 145 0.04 75
IV.FRON.EHZ. 2020-08-21T01:48:20.99 0.3 undecidable manual S 296 0.1088 128 0.14 73
IV.NARO.HHZ. 2020-08-21T01:48:20.37 0.3 undecidable manual P 305 0.2464 101 -0.09 71
IV.FOSV.EHZ. 2020-08-21T01:48:19.37 0.6 positive manual P 202 0.1907 107 -0.15 48
IV.ARVD.HHZ. 2020-08-21T01:48:19.81 0.6 undecidable manual S 65 0.0639 146 -0.13 49
IV.MPAG.HNN. 2020-08-21T01:48:19.18 0.3 undecidable manual P 335 0.1745 110 -0.09 72
IV.ATSC.EHE. 2020-08-21T01:48:18.49 0.6 undecidable manual P 250 0.1349 120 -0.16 48
IV.FRON.EHZ. 2020-08-21T01:48:18.28 1.0 undecidable manual P 296 0.1088 128 0 25
IV.ARVD.HHZ. 2020-08-21T01:48:17.75 0.6 undecidable manual P 65 0.0639 146 -0.01 50
IV.SSFR.HHE. 2020-08-21T01:48:17.80 0.1 undecidable manual P 239 0.0665 145 0.02 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ARVD.HHN. ML:0.1 1.49031E-5 0.14 AML other m 2020-08-21T01:48:20.07
IV.ARVD.HHE. ML:0 1.1998745E-5 0.06 AML other m 2020-08-21T01:48:20.03
IV.FRON.EHN. ML:0.2 1.7431238E-5 0.06 AML other m 2020-08-21T01:48:21.24
IV.FRON.EHE. ML:0 1.0446838E-5 0.1 AML other m 2020-08-21T01:48:21.15
IV.FOSV.EHE. ML:-0.1 6.4972736E-6 0.06 AML other m 2020-08-21T01:48:23.13
IV.FOSV.EHN. ML:-0.1 5.65807315E-6 0.08 AML other m 2020-08-21T01:48:23.15
IV.PIEI.HHE. ML:0 5.5272775E-6 0.16 AML other m 2020-08-21T01:48:24.87
IV.PIEI.HHN. ML:0.3 1.04684158E-5 1.58 AML other m 2020-08-21T01:48:20.16
IV.NARO.HHN. ML:0 3.4721703E-6 0.68 AML other m 2020-08-21T01:48:20.25
IV.NARO.HHE. ML:0 4.7882295E-6 0.08 AML other m 2020-08-21T01:48:25.06
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