Earthquake with magnitude of ML 0.9 on date 04-08-2020 and time 17:10:39 (UTC) in region 7 km W Sassoferrato (AN)

A magnitude ML 0.9 earthquake occured in region: 7 km W Sassoferrato (AN), on

  • 04-08-2020 17:10:39 (UTC)
  • 04-08-2020 19:10:39 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.41, 12.79 at 12 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 7 7285 7285
Costacciaro PG 8 1216 8501
Serra Sant'Abbondio PU 9 1027 9528
Sigillo PG 9 2404 11932
Scheggia e Pascelupo PG 10 1393 13325
Frontone PU 12 1300 14625
Genga AN 12 1797 16422
Fabriano AN 13 31480 47902
Fossato di Vico PG 13 2840 50742
Cantiano PU 15 2245 52987
Arcevia AN 16 4612 57599
Pergola PU 18 6333 63932
Gubbio PG 18 32216 96148
Cagli PU 19 8731 104879
Cerreto d'Esi AN 19 3817 108696
Serra San Quirico AN 19 2850 111546
Gualdo Tadino PG 20 15208 126754

Municipalities with at least 50000 inhabitants

An earthquake occurred to
47 Km NE of Perugia (166134 inhabitants)
51 Km N of Foligno (57155 inhabitants)
52 Km SW of Fano (60888 inhabitants)
57 Km S of Pesaro (94582 inhabitants)
64 Km W of Ancona (100861 inhabitants)
73 Km E of Arezzo (99543 inhabitants)
75 Km S of Rimini (147750 inhabitants)
92 Km SE of Cesena (96758 inhabitants)
95 Km N of Terni (111501 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 0.9 2020-08-04
17:10:39
43.41 12.79 12 2020-08-04
17:22:06
Sala Sismica INGV-Roma 81649721
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-08-04 17:10:39 ± 0.08
Latitude 43.41 ± 0.00
Longitude 12.79 ± 0.01
Depth (km) 12 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 81649721

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 407
Semi-minor axis of confidence ellipse (meter) 344
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 304
Circular confidence region, given by single value of horizontal uncertainty (meter) 410
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 137
Number of associated phases, regardless of their use for origin computation 36
Number of defining phases 22
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.19
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.29138
Number of stations at which the event was observed 24
Number of stations from which data was used for origin computation 11
Magnitude information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.4
Num. used stations 11
Type of magnitude ML
Reference to an origin 81649721
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-08-04 17:22:06
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.ZONE.HHZ. 2020-08-04T17:12:14.19 3.0 undecidable manual Sg 6.41 0
GU.RNCA.HHZ. 2020-08-04T17:12:12.38 3.0 undecidable manual Sn 4.37 0
IV.CAR1.HHZ. 2020-08-04T17:12:00.40 3.0 undecidable manual Pg 14.93 0
IV.IACL.HHZ. 2020-08-04T17:12:00.81 3.0 positive manual Pg 12.31 0
IV.FREG.EHZ. 2020-08-04T17:11:56.74 3.0 undecidable manual Sg 2.31 0
CH.MUGIO.HHZ. 2020-08-04T17:11:42.19 3.0 negative manual Pg 6.46 0
IV.SENA.HHZ. 2020-08-04T17:11:41.96 3.0 undecidable manual Pn 4.87 0
IV.PTRJ.HNZ. 2020-08-04T17:11:41.63 3.0 undecidable manual Sn 0.51 0
IV.VAGA.HHZ. 2020-08-04T17:11:34.75 3.0 undecidable manual Sn -3.09 0
ST.GAGG.HHZ. 2020-08-04T17:11:28.16 3.0 undecidable manual Pg 2.99 0
IV.PTRJ.HNZ. 2020-08-04T17:11:11.27 3.0 undecidable manual Pn -0.4 0
IV.IMOL.HNZ. 2020-08-04T17:11:04.29 3.0 negative manual P 2.44 0
IV.MOCL.EHZ. 2020-08-04T17:11:03.83 3.0 undecidable manual Pn -0.09 0
IV.ATLO.HNZ. 2020-08-04T17:10:50.43 0.3 undecidable manual S 251 0.2914 93 -0.05 71
IV.ATCC.HNE. 2020-08-04T17:10:49.45 0.6 undecidable manual S 205 0.2491 94 0.23 46
IV.MURB.HHZ. 2020-08-04T17:10:49.36 0.6 undecidable manual S 232 0.241 94 0.39 45
IV.MPAG.HNE. 2020-08-04T17:10:48.39 0.1 undecidable manual S 355 0.2194 95 0.04 97
IV.ATBU.HNE. 2020-08-04T17:10:47.55 0.3 undecidable manual S 291 0.1853 97 0.23 71
IV.PIEI.HHZ. 2020-08-04T17:10:47.95 0.3 undecidable manual S 305 0.2212 95 -0.45 66
IV.ARVD.HHZ. 2020-08-04T17:10:46.11 0.1 undecidable manual S 52 0.143 105 0.02 98
IV.MURB.HHZ. 2020-08-04T17:10:45.01 0.1 undecidable manual P 232 0.241 94 0.1 95
IV.ATLO.HNZ. 2020-08-04T17:10:45.63 0.3 undecidable manual P 251 0.2914 93 -0.15 70
IV.FRON.EHZ. 2020-08-04T17:10:45.25 0.1 undecidable manual S 338 0.116 115 -0.11 97
IV.FOSV.EHN. 2020-08-04T17:10:45.22 0.3 undecidable manual S 189 0.1169 115 -0.16 73
IV.PIEI.HHZ. 2020-08-04T17:10:44.53 0.1 undecidable manual P 305 0.2212 95 -0.05 96
IV.ATSC.EHZ. 2020-08-04T17:10:44.27 0.1 undecidable manual S 281 0.0737 135 -0.06 99
IV.MPAG.HNE. 2020-08-04T17:10:44.45 0.1 undecidable manual P 355 0.2194 95 -0.1 95
IV.ATBU.HNE. 2020-08-04T17:10:44.57 0.3 undecidable manual P 291 0.1853 97 0.61 64
IV.ATCC.HNE. 2020-08-04T17:10:44.71 0.3 undecidable manual P 205 0.2491 94 -0.34 68
IV.FDMO.HHZ. 2020-08-04T17:10:43.26 3.0 undecidable manual P 0
IV.SSFR.HHZ. 2020-08-04T17:10:43.72 0.6 undecidable manual S 353 0.0261 163 0.13 49
IV.ARVD.HHZ. 2020-08-04T17:10:43.27 0.1 undecidable manual P 52 0.143 105 0.02 98
IV.FOSV.EHN. 2020-08-04T17:10:42.75 0.1 undecidable manual P 189 0.1169 115 -0.09 98
IV.ATSC.EHZ. 2020-08-04T17:10:42.24 0.1 undecidable manual P 281 0.0737 135 0 100
IV.FRON.EHZ. 2020-08-04T17:10:42.84 0.1 undecidable manual P 338 0.116 115 0.01 99
IV.SSFR.HHZ. 2020-08-04T17:10:41.89 0.1 undecidable manual P 353 0.0261 163 0.08 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SSFR.HHE. ML:1.2 0.0002255 0.08 AML other m 2020-08-04T17:10:43.76
IV.SSFR.HHN. ML:1.2 0.000251 0.08 AML other m 2020-08-04T17:10:43.80
IV.FRON.EHE. ML:0.9 7.97E-5 0.12 AML other m 2020-08-04T17:10:45.30
IV.SSFR.HNE. ML:1.4 0.00039634015 0.064 AML other m 2020-08-04T17:10:44.08
IV.SSFR.HNN. ML:1.4 0.00040408775 0.0512 AML other m 2020-08-04T17:10:43.94
IV.FRON.EHN. ML:0.9 7.9153355E-5 0.064 AML other m 2020-08-04T17:10:45.72
IV.ARVD.HHE. ML:0.7 3.7974565E-5 0.0896 AML other m 2020-08-04T17:10:46.20
IV.ARVD.HHN. ML:0.6 2.9173125E-5 0.1152 AML other m 2020-08-04T17:10:46.33
IV.PIEI.HHE. ML:0.4 1.3368046E-5 0.0768 AML other m 2020-08-04T17:10:49.43
IV.PIEI.HHN. ML:0.2 7.853486E-6 0.0896 AML other m 2020-08-04T17:10:49.43
IV.MURB.HHN. ML:0.8 3.449449E-5 0.6016 AML other m 2020-08-04T17:11:04.46
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