Earthquake with magnitude of ML 1.6 on date 27-09-2020 and time 03:37:01 (Italy) in region 8 km W Verghereto (FC)

A magnitude ML 1.6 earthquake occured in region: 8 km W Verghereto (FC), on

  • 27-09-2020 01:37:01 (UTC)
  • 27-09-2020 03:37:01 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.78, 11.91 at 18 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
Verghereto FC 8 1907 1907
Chiusi della Verna AR 9 2023 3930
Bagno di Romagna FC 10 6026 9956
Bibbiena AR 12 12241 22197
Poppi AR 13 6160 28357
Chitignano AR 13 899 29256
Castel Focognano AR 15 3149 32405
Pratovecchio Stia AR 15 5845 38250
Caprese Michelangelo AR 16 1426 39676
Pieve Santo Stefano AR 16 3183 42859
Ortignano Raggiolo AR 17 878 43737
Castel San Niccolò AR 17 2707 46444
Santa Sofia FC 19 4136 50580
Casteldelci RN 20 407 50987

Municipalities with at least 50000 inhabitants

An earthquake occurred to
35 Km N of Arezzo (99543 inhabitants)
48 Km SW of Cesena (96758 inhabitants)
51 Km S of Forlì (117913 inhabitants)
53 Km E of Firenze (382808 inhabitants)
57 Km S of Faenza (58541 inhabitants)
59 Km E of Scandicci (50609 inhabitants)
61 Km SW of Rimini (147750 inhabitants)
66 Km S of Imola (69797 inhabitants)
66 Km E of Prato (191150 inhabitants)
69 Km NE of Siena (53903 inhabitants)
75 Km SW of Ravenna (159116 inhabitants)
82 Km E of Pistoia (90315 inhabitants)
82 Km W of Pesaro (94582 inhabitants)
84 Km NW of Perugia (166134 inhabitants)
89 Km W of Fano (60888 inhabitants)
92 Km SE of Bologna (386663 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 1.6 2020-09-27
01:37:01
43.78 11.91 18 2020-09-27
01:42:01
Sala Sismica INGV-Roma 83286141
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-09-27 01:37:01 ± 0.07
Latitude 43.78 ± 0.00
Longitude 11.91 ± 0.00
Depth (km) 18 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 83286141

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 403
Semi-minor axis of confidence ellipse (meter) 304
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 32
Circular confidence region, given by single value of horizontal uncertainty (meter) 400
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 140
Number of associated phases, regardless of their use for origin computation 16
Number of defining phases 12
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.08
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.51261
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 6
Magnitude information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.3
Num. used stations 4
Type of magnitude ML
Reference to an origin 83286141
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-09-27 01:42:01
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
GU.GSCL.HHZ. 2020-09-27T01:37:39.56 3.0 undecidable manual S 0.07 0
IV.SACS.HHZ. 2020-09-27T01:37:20.32 3.0 undecidable manual P 0.49 0
IV.ATMI.HHZ. 2020-09-27T01:37:19.61 3.0 undecidable manual S 0.5126 0.44 0
IV.RUFI.EHZ. 2020-09-27T01:37:12.78 0.6 undecidable manual S 282 0.2968 107 -0.14 47
IV.PARC.HHZ. 2020-09-27T01:37:12.08 0.6 undecidable manual S 119 0.2689 110 -0.04 48
IV.ATMI.HHZ. 2020-09-27T01:37:12.35 3.0 undecidable manual P 0.5126 0.7 0
IV.SSP9.EHZ. 2020-09-27T01:37:12.00 0.6 undecidable manual S 142 0.2581 111 0.17 47
IV.RINC.HHZ. 2020-09-27T01:37:11.50 0.6 undecidable manual S 296 0.2455 112 0.01 49
IV.SFI.EHZ. 2020-09-27T01:37:08.61 0.6 undecidable manual S 339 0.1349 132 -0.09 49
IV.RUFI.EHZ. 2020-09-27T01:37:08.04 0.6 positive manual P 282 0.2968 107 -0.01 48
IV.PARC.HHZ. 2020-09-27T01:37:07.48 0.1 undecidable manual P 119 0.2689 110 -0.1 95
IV.SSP9.EHZ. 2020-09-27T01:37:07.33 0.6 undecidable manual P 142 0.2581 111 -0.09 48
IV.RINC.HHZ. 2020-09-27T01:37:07.31 0.1 undecidable manual P 296 0.2455 112 0.09 96
IV.ASQU.HHZ. 2020-09-27T01:37:07.76 0.6 undecidable manual S 282 0.0908 145 -0.07 49
IV.ASQU.HHZ. 2020-09-27T01:37:05.15 0.1 negative manual P 282 0.0908 145 0.04 100
IV.SFI.EHZ. 2020-09-27T01:37:05.68 0.1 negative manual P 339 0.1349 132 0.07 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ASQU.HHE. ML:1.7 0.0003845 0.34 AML other m 2020-09-27T01:37:07.82
IV.ASQU.HHN. ML:1.9 0.0006445 1.8 AML other m 2020-09-27T01:37:07.90
IV.SFI.EHE. ML:1.5 0.000236 0.24 AML other m 2020-09-27T01:37:08.72
IV.SFI.EHN. ML:1.2 0.00011845 0.74 AML other m 2020-09-27T01:37:09.15
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