Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.2 on date 07-09-2021 and time 20:55:39 (Italy) in region 4 km W Apecchio (PU)

A magnitude ML 0.2 earthquake occured in region: 4 km W Apecchio (PU), on

  • 07-09-2021 18:55:39 (UTC)
  • 07-09-2021 20:55:39 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.5660, 12.3670 at 5 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
Apecchio PU 4 1882 1882
Mercatello sul Metauro PU 10 1378 3260
Sant'Angelo in Vado PU 12 4133 7393
Borgo Pace PU 12 606 7999
Piobbico PU 12 2029 10028
Pietralunga PG 15 2111 12139
San Giustino PG 15 11297 23436
Città di Castello PG 16 39913 63349
Sestino AR 17 1355 64704
Belforte all'Isauro PU 17 769 65473
Urbania PU 17 7099 72572
Peglio PU 18 696 73268
Sansepolcro AR 18 15884 89152
Piandimeleto PU 18 2167 91319
Lunano PU 19 1527 92846

Municipalities with at least 50000 inhabitants

An earthquake occurred to
41 Km E of Arezzo (99543 inhabitants)
51 Km N of Perugia (166134 inhabitants)
57 Km S of Rimini (147750 inhabitants)
58 Km SW of Pesaro (94582 inhabitants)
61 Km SW of Fano (60888 inhabitants)
64 Km S of Cesena (96758 inhabitants)
73 Km NW of Foligno (57155 inhabitants)
78 Km SE of Forlì (117913 inhabitants)
88 Km E of Siena (53903 inhabitants)
89 Km SE of Faenza (58541 inhabitants)
92 Km E of Firenze (382808 inhabitants)
93 Km W of Ancona (100861 inhabitants)
96 Km S of Ravenna (159116 inhabitants)
98 Km E of Scandicci (50609 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 0.2 2021-09-07
18:55:39		 43.5662 12.3673 5 2021-09-07
19:01:41		 Sala Sismica INGV-Roma 95168511
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-07 18:55:39 ± 0.34
Latitude 43.5662 ± 0.0081
Longitude 12.3673 ± 0.0112
Depth (km) 5 ± 4 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 95168511

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 919
Semi-minor axis of confidence ellipse (meter) 255
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 39
Circular confidence region, given by single value of horizontal uncertainty (meter) 920.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 141
Number of associated phases, regardless of their use for origin computation 14
Number of defining phases 13
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.36
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.27160
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 7
Magnitude information

ML:0.2

Field Value
Value 0.2
Uncertainty 0.3
Num. used stations 4
Type of magnitude ML
Reference to an origin 95168511
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-07 19:01:41
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ATSC.EHE. 2021-09-07T18:55:50.16 0.6 undecidable manual S 121 30.1476 100 0.32 47
IV.FRON.EHZ. 2021-09-07T18:55:49.29 0.6 undecidable manual S 100 29.3484 100 -0.27 47
IV.ATVO.HHZ. 2021-09-07T18:55:47.18 0.6 undecidable manual S 171 20.6682 104 0.56 45
IV.FRON.EHZ. 2021-09-07T18:55:45.39 0.1 undecidable manual P 100 29.3484 100 0.2 96
IV.NARO.HHZ. 2021-09-07T18:55:45.34 0.3 undecidable manual S 74 17.871 106 -0.33 72
IV.ATSC.EHE. 2021-09-07T18:55:45.63 0.1 undecidable manual P 121 30.1476 100 0.28 95
IV.PARC.HHZ. 2021-09-07T18:55:44.42 0.6 undecidable manual S 312 13.7751 110 0.08 51
IV.ATPI.HNZ. 2021-09-07T18:55:43.69 0.6 undecidable manual S 168 13.0758 111 -0.43 47
IV.ATVO.HHZ. 2021-09-07T18:55:43.66 0.6 negative manual P 171 20.6682 104 0.16 49
IV.PARC.HHZ. 2021-09-07T18:55:42.15 0.6 negative manual P 312 13.7751 110 -0.03 51
IV.NARO.HHZ. 2021-09-07T18:55:42.84 0.1 undecidable manual P 74 17.871 106 -0.11 100
IV.ATPI.HNZ. 2021-09-07T18:55:41.28 0.1 undecidable manual P 168 13.0758 111 -0.77 83
IV.APEC.HHZ. 2021-09-07T18:55:41.09 0.3 negative manual P 101 4.2957 140 0.52 70
IV.CRTC.HHZ. 2021-09-07T18:55:38.19 3.0 undecidable manual P 0 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ATVO.HHE. ML:0.6 0.000028400000000000003 0.14 AML other m 2021-09-07T18:55:47.52
IV.ATVO.HHN. ML:0.4 0.0000213 0.1 AML other m 2021-09-07T18:55:47.74
IV.APEC.HHE. ML:0.0 0.000050129435 0.1408 AML other m 2021-09-07T18:55:43.16
IV.APEC.HHN. ML:0.0 0.00003880309 0.1792 AML other m 2021-09-07T18:55:42.51
IV.PARC.HHE. ML:-0.1 0.0000104027695 0.0896 AML other m 2021-09-07T18:55:46.08
IV.PARC.HHN. ML:-0.1 0.000012000509999999999 0.128 AML other m 2021-09-07T18:55:46.04
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