Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.4 on date 01-05-2020 and time 20:49:38 (Italy) in region 4 km W Chiusi della Verna (AR)

A magnitude ML 1.4 earthquake occured in region: 4 km W Chiusi della Verna (AR), on

  • 01-05-2020 18:49:38 (UTC)
  • 01-05-2020 20:49:38 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.6990, 11.8880 at 11 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

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
Chiusi della Verna AR 4 2023 2023
Chitignano AR 4 899 2922
Bibbiena AR 6 12241 15163
Castel Focognano AR 7 3149 18312
Caprese Michelangelo AR 10 1426 19738
Poppi AR 10 6160 25898
Ortignano Raggiolo AR 11 878 26776
Pieve Santo Stefano AR 13 3183 29959
Talla AR 13 1062 31021
Subbiano AR 14 6331 37352
Verghereto FC 14 1907 39259
Capolona AR 15 5438 44697
Castel San Niccolò AR 15 2707 47404
Pratovecchio Stia AR 17 5845 53249
Bagno di Romagna FC 19 6026 59275

Municipalities with at least 50000 inhabitants

An earthquake occurred to
26 Km N of Arezzo (99543 inhabitants)
51 Km E of Firenze (382808 inhabitants)
56 Km SW of Cesena (96758 inhabitants)
57 Km E of Scandicci (50609 inhabitants)
60 Km S of Forlì (117913 inhabitants)
62 Km NE of Siena (53903 inhabitants)
65 Km S of Faenza (58541 inhabitants)
67 Km E of Prato (191150 inhabitants)
68 Km SW of Rimini (147750 inhabitants)
74 Km S of Imola (69797 inhabitants)
77 Km NW of Perugia (166134 inhabitants)
82 Km E of Pistoia (90315 inhabitants)
84 Km SW of Ravenna (159116 inhabitants)
86 Km W of Pesaro (94582 inhabitants)
92 Km W of Fano (60888 inhabitants)
99 Km SE of Bologna (386663 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
Bulletin
Rev1000 		ML 1.4 2020-05-01
18:49:38		 43.6993 11.8878 11 2020-11-19
12:36:55		 Bollettino Sismico Italiano INGV 81579061
Reviewed
Rev100 		ML 1.4 2020-05-01
18:49:38		 43.6965 11.8853 11 2020-05-01
18:56:20		 Sala Sismica INGV-Roma 78730821
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-05-01 18:49:38 ± 0.06
Latitude 43.6993 ± 0.0045
Longitude 11.8878 ± 0.0062
Depth (km) 11 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 81579061

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 665
Semi-minor axis of confidence ellipse (meter) 61
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 223
Circular confidence region, given by single value of horizontal uncertainty (meter) 670.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 109
Number of associated phases, regardless of their use for origin computation 26
Number of defining phases 26
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.23
Epicentral distance of station closest to the epicenter (degree) 0.09263
Epicentral distance of station farthest from the epicenter (degree) 1.06390
Number of stations at which the event was observed 14
Number of stations from which data was used for origin computation 14
Magnitudes information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 78730821
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-05-01 18:56:20

ML:1.4

Field Value
Value 1.4
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 81579061
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-08-02 14:13:26
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
GU.CARD.HHZ. 2020-05-01T18:49:58.51 0.3 undecidable manual P 288 118.0929 50 -0.01 61
IV.ATVO.HHZ. 2020-05-01T18:49:56.16 0.6 undecidable manual S 130 54.6009 50 0.21 44
IV.CSNT.HHZ. 2020-05-01T18:49:55.57 0.6 undecidable manual S 243 54.2013 50 -0.28 44
IV.RONT.HHZ. 2020-05-01T18:49:55.43 0.3 undecidable manual S 312 48.9177 50 1 51
IV.LMD.HHZ. 2020-05-01T18:49:53.36 0.3 undecidable manual S 341 44.3223 50 0.13 69
IV.RUFI.EHZ. 2020-05-01T18:49:50.11 0.3 undecidable manual S 297 34.0437 50 -0.35 67
IV.BADI.EHZ. 2020-05-01T18:49:50.70 0.3 undecidable manual S 126 35.5422 50 -0.16 69
IV.CSNT.HHZ. 2020-05-01T18:49:49.12 0.3 undecidable manual P 243 54.2013 50 0.46 63
IV.RINC.HHZ. 2020-05-01T18:49:49.36 0.3 undecidable manual S 313 30.6471 50 -0.19 70
IV.SEI.HHZ. 2020-05-01T18:49:49.54 0.6 undecidable manual P 313 57.7977 50 0.32 43
IV.PARC.HHZ. 2020-05-01T18:49:49.07 0.3 undecidable manual S 101 28.6491 50 0.03 72
IV.RONT.HHZ. 2020-05-01T18:49:48.07 0.3 undecidable manual P 312 48.9177 50 0.23 67
IV.ATVO.HHZ. 2020-05-01T18:49:48.91 0.3 undecidable manual P 130 54.6009 50 0.19 67
IV.LMD.HHZ. 2020-05-01T18:49:47.03 0.3 undecidable manual P 341 44.3223 50 -0.12 69
IV.SFI.EHZ. 2020-05-01T18:49:47.47 0.3 undecidable manual S 352 23.0547 50 -0.06 73
IV.SSP9.EHZ. 2020-05-01T18:49:47.57 0.3 undecidable manual S 125 23.9538 50 -0.22 70
IV.RUFI.EHZ. 2020-05-01T18:49:45.28 0.1 undecidable manual P 297 34.0437 50 -0.27 91
IV.BADI.EHZ. 2020-05-01T18:49:45.77 0.3 undecidable manual P 126 35.5422 50 -0.01 72
IV.RINC.HHZ. 2020-05-01T18:49:44.69 0.3 undecidable manual P 313 30.6471 50 -0.34 68
IV.PARC.HHZ. 2020-05-01T18:49:44.77 0.1 undecidable manual P 101 28.6491 50 0.04 96
IV.CRE.HHZ. 2020-05-01T18:49:44.00 0.1 undecidable manual S 150 10.2786 136 0 100
IV.SSP9.EHZ. 2020-05-01T18:49:44.05 0.1 undecidable manual P 125 23.9538 50 0.04 97
IV.ASQU.HHZ. 2020-05-01T18:49:44.73 0.1 undecidable manual S 324 13.3755 129 -0.06 98
IV.SFI.EHZ. 2020-05-01T18:49:43.80 0.1 undecidable manual P 352 23.0547 50 -0.06 97
IV.ASQU.HHZ. 2020-05-01T18:49:42.28 0.1 undecidable manual P 324 13.3755 129 0 99
IV.CRE.HHZ. 2020-05-01T18:49:41.87 0.1 undecidable manual P 150 10.2786 136 0.05 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CRE.HHN. ML:2.0 0.0011795 0.14 AML other m 2020-05-01T18:49:44.11
IV.CRE.HHE. ML:1.7 0.000606 1.46 AML other m 2020-05-01T18:49:44.09
IV.ASQU.HHN. ML:1.3 0.000222 1.7 AML other m 2020-05-01T18:49:45.98
IV.ASQU.HHE. ML:1.3 0.0001885 1.12 AML other m 2020-05-01T18:49:45.63
IV.PARC.HHN. ML:1.3 0.00009495 0.14 AML other m 2020-05-01T18:49:49.28
IV.PARC.HHE. ML:1.1 0.00006494999999999999 0.64 AML other m 2020-05-01T18:49:50.44
IV.BADI.EHN. ML:1.3 0.00007875 0.16 AML other m 2020-05-01T18:49:51.26
IV.BADI.EHE. ML:1.3 0.0000816 1.24 AML other m 2020-05-01T18:49:51.31
IV.ATVO.HHE. ML:1.2 0.00003895 0.74 AML other m 2020-05-01T18:49:59.07
IV.ATVO.HHN. ML:1.4 0.00006659999999999999 0.82 AML other m 2020-05-01T18:49:59.45
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