Earthquake with magnitude of ML 1.1 on date 18-10-2019 and time 03:26:46 (Italy) in region 5 km SW Arezzo (AR)

A magnitude ML 1.1 earthquake occured in region: 5 km SW Arezzo (AR), on

  • 18-10-2019 01:26:46 (UTC)
  • 18-10-2019 03:26:46 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.44, 11.83 at 10 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
Arezzo AR 5 99543 99543
Civitella in Val di Chiana AR 7 9121 108664
Castiglion Fibocchi AR 11 2167 110831
Pergine Valdarno AR 12 3162 113993
Laterina AR 12 3517 117510
Castiglion Fiorentino AR 13 13244 130754
Capolona AR 14 5438 136192
Monte San Savino AR 15 8743 144935
Subbiano AR 15 6331 151266
Marciano della Chiana AR 16 3466 154732
Bucine AR 18 10164 164896
Talla AR 18 1062 165958
Lucignano AR 20 3581 169539

Municipalities with at least 50000 inhabitants

An earthquake occurred to
5 Km SW of Arezzo (99543 inhabitants)
43 Km E of Siena (53903 inhabitants)
58 Km NW of Perugia (166134 inhabitants)
59 Km SE of Firenze (382808 inhabitants)
63 Km SE of Scandicci (50609 inhabitants)
77 Km SE of Prato (191150 inhabitants)
84 Km SW of Cesena (96758 inhabitants)
89 Km S of Forlì (117913 inhabitants)
89 Km NW of Foligno (57155 inhabitants)
91 Km SW of Rimini (147750 inhabitants)
92 Km SE of Pistoia (90315 inhabitants)
94 Km S of Faenza (58541 inhabitants)
96 Km NE of Grosseto (82087 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
Rev 100 ML 1.1 2019-10-18
01:26:46
43.44 11.83 10 2019-10-18
01:43:16
Sala Sismica INGV-Roma 73316241
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-10-18 01:26:46 ± 0.15
Latitude 43.44 ± 0.01
Longitude 11.83 ± 0.01
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 73316241

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 517
Semi-minor axis of confidence ellipse (meter) 414
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 178
Circular confidence region, given by single value of horizontal uncertainty (meter) 520
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 71
Number of associated phases, regardless of their use for origin computation 27
Number of defining phases 25
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.28
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.64481
Number of stations at which the event was observed 17
Number of stations from which data was used for origin computation 15
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.3
Num. used stations 16
Type of magnitude ML
Reference to an origin 73316241
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-10-18 01:43:16
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
MN.TRI.HHZ. 2019-10-18T01:28:00.30 3.0 undecidable manual Sn 0.01 0
IV.LAV9.HHZ. 2019-10-18T01:27:20.98 3.0 undecidable manual Pg 4.07 0
IV.MGAB.HHZ. 2019-10-18T01:27:06.11 0.6 undecidable manual S 159 0.5666 50 0.48 44
IV.MURB.HHZ. 2019-10-18T01:27:04.90 0.6 undecidable manual S 109 0.5333 50 0.26 47
IV.OSSC.HNE. 2019-10-18T01:27:02.15 0.6 undecidable manual S 281 0.4335 50 0.46 46
IV.RUFI.EHZ. 2019-10-18T01:27:02.33 0.6 undecidable manual S 329 0.4596 50 -0.14 49
IV.CSNT.HHN. 2019-10-18T01:27:00.91 0.6 undecidable manual S 275 0.3957 50 0.36 47
IV.PARC.HHZ. 2019-10-18T01:26:59.40 0.6 undecidable manual S 55 0.3588 50 -0.07 50
IV.ARCI.HNE. 2019-10-18T01:26:58.54 0.1 undecidable manual P 204 0.6448 50 -0.18 93
IV.ATMI.HHZ. 2019-10-18T01:26:58.79 0.6 undecidable manual S 109 0.3336 50 0.07 51
IV.SACS.HNE. 2019-10-18T01:26:57.79 0.1 undecidable manual P 175 0.5954 50 -0.08 96
IV.MGAB.HHZ. 2019-10-18T01:26:57.57 0.6 undecidable manual P 159 0.5666 50 0.19 47
IV.MURB.HHZ. 2019-10-18T01:26:56.94 0.3 negative manual P 109 0.5333 50 0.13 72
IV.SSP9.EHN. 2019-10-18T01:26:56.01 0.6 undecidable manual S 59 0.2527 50 -0.33 49
IV.ATMC.EHE. 2019-10-18T01:26:56.68 0.6 undecidable manual S 89 0.2608 50 0.11 51
IV.CDCA.HNN. 2019-10-18T01:26:55.64 0.1 undecidable manual P 87 0.2905 50 2.98 6
IV.RUFI.EHZ. 2019-10-18T01:26:55.75 1.0 undecidable manual P 329 0.4596 50 0.2 24
IV.CRE.HHZ. 2019-10-18T01:26:54.39 0.6 undecidable manual S 26 0.1961 114 -0.02 52
IV.CSNT.HHN. 2019-10-18T01:26:54.06 0.1 undecidable manual P 275 0.3957 50 -0.39 93
IV.OSSC.HNE. 2019-10-18T01:26:54.84 0.1 undecidable manual P 281 0.4335 50 -0.27 95
IV.PARC.HHZ. 2019-10-18T01:26:54.05 0.1 undecidable manual P 55 0.3588 50 0.22 97
IV.ASQU.HHZ. 2019-10-18T01:26:54.14 0.1 undecidable manual P 355 0.3561 50 0.37 95
IV.BADI.EHZ. 2019-10-18T01:26:53.00 1.0 undecidable manual P 77 0.3058 50 0.09 25
IV.ATMI.HHZ. 2019-10-18T01:26:53.18 1.0 positive manual P 109 0.3336 50 -0.21 25
IV.ATMC.EHE. 2019-10-18T01:26:51.65 0.1 undecidable manual P 89 0.2608 50 -0.5 94
IV.CRE.HHZ. 2019-10-18T01:26:51.15 0.1 negative manual P 26 0.1961 114 0.25 100
IV.SSP9.EHN. 2019-10-18T01:26:51.60 0.1 undecidable manual P 59 0.2527 50 -0.41 96
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CRE.HHE. ML:0.8 4.4061665E-5 0.26 AML other m 2019-10-18T01:26:56.38
IV.CRE.HHN. ML:0.8 4.6044675E-5 0.14 AML other m 2019-10-18T01:26:55.12
IV.BADI.EHE. ML:0.7 2.1344115E-5 0.16 AML other m 2019-10-18T01:26:58.15
IV.BADI.EHN. ML:0.6 1.436693E-5 0.3 AML other m 2019-10-18T01:26:59.10
IV.ATMI.HHE. ML:1.1 4.927366E-5 0.38 AML other m 2019-10-18T01:27:03.84
IV.ATMI.HHN. ML:1 3.899389E-5 0.24 AML other m 2019-10-18T01:27:03.00
IV.RUFI.EHE. ML:1.6 9.88566095E-5 5.04 AML other m 2019-10-18T01:27:12.20
IV.RUFI.EHN. ML:1.2 4.7193695E-5 3.96 AML other m 2019-10-18T01:27:18.57
IV.MURB.HNE. ML:1.6 8.5711955E-5 0.5304 AML other m 2019-10-18T01:27:21.64
IV.MURB.HNN. ML:1.7 0.000107391355 0.8896 AML other m 2019-10-18T01:27:21.93
IV.MURB.HHE. ML:1 1.7785897E-5 0.2 AML other m 2019-10-18T01:27:07.99
IV.MURB.HHN. ML:1.1 2.459664E-5 0.38 AML other m 2019-10-18T01:27:08.80
IV.MGAB.HNE. ML:1.4 5.0283845E-5 1.4 AML other m 2019-10-18T01:27:07.65
IV.MGAB.HNN. ML:1.2 3.1212995E-5 4.32 AML other m 2019-10-18T01:27:08.19
IV.MGAB.HHE. ML:0.9 1.4980535E-5 0.22 AML other m 2019-10-18T01:27:09.10
IV.MGAB.HHN. ML:0.9 1.5338975E-5 0.22 AML other m 2019-10-18T01:27:07.40
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