Earthquake with magnitude of ML 1.7 on date 22-08-2019 and time 07:16:33 (Italy) in region 6 km SW Asciano (SI)

A magnitude ML 1.7 earthquake occured in region: 6 km SW Asciano (SI), on

  • 22-08-2019 05:16:33 (UTC)
  • 22-08-2019 07:16:33 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.19, 11.51 at 2 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
Asciano SI 6 7118 7118
Buonconvento SI 7 3173 10291
San Giovanni d'Asso SI 8 853 11144
Monteroni d'Arbia SI 9 9088 20232
Murlo SI 10 2389 22621
Trequanda SI 13 1254 23875
Rapolano Terme SI 13 5249 29124
Montalcino SI 15 5093 34217
San Quirico d'Orcia SI 16 2662 36879
Castelnuovo Berardenga SI 17 9097 45976
Sinalunga SI 18 12764 58740
Pienza SI 19 2107 60847

Municipalities with at least 50000 inhabitants

An earthquake occurred to
20 Km SE of Siena (53903 inhabitants)
43 Km SW of Arezzo (99543 inhabitants)
58 Km NE of Grosseto (82087 inhabitants)
67 Km SE of Firenze (382808 inhabitants)
68 Km SE of Scandicci (50609 inhabitants)
72 Km W of Perugia (166134 inhabitants)
84 Km SE of Prato (191150 inhabitants)
95 Km SE of Pistoia (90315 inhabitants)
99 Km NW of Viterbo (67173 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 1.7 2019-08-22
05:16:33
43.19 11.51 2 2019-08-22
05:27:24
Sala Sismica INGV-Roma 71692091
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-08-22 05:16:33 ± 0.1
Latitude 43.19 ± 0.00
Longitude 11.51 ± 0.01
Depth (km) 2 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 71692091

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 520
Semi-minor axis of confidence ellipse (meter) 258
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 55
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) 67
Number of associated phases, regardless of their use for origin computation 42
Number of defining phases 33
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.41
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.84896
Number of stations at which the event was observed 31
Number of stations from which data was used for origin computation 22
Magnitude information

ML:1.7

Field Value
Value 1.7
Uncertainty 0.3
Num. used stations 29
Type of magnitude ML
Reference to an origin 71692091
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-08-22 05:27:24
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
GU.RSP.HHZ. 2019-08-22T05:18:16.00 3.0 undecidable manual Sn 0.21 0
SL.LJU.BHZ. 2019-08-22T05:18:15.17 3.0 undecidable manual Sn 0.55 0
IV.TDS.HHZ. 2019-08-22T05:18:01.52 3.0 undecidable manual Pg 10.35 0
IV.MNTT.EHZ. 2019-08-22T05:17:27.37 3.0 undecidable manual Sg 2.32 0
IT.ORP.HGZ. 2019-08-22T05:17:27.07 3.0 positive manual Pn -0.99 0
IV.VAGA.HHZ. 2019-08-22T05:17:20.81 3.0 positive manual Pn 2.23 0
IV.VVLD.HHZ. 2019-08-22T05:17:10.69 3.0 negative manual Pn 0.95 0
GU.RNCA.HHZ. 2019-08-22T05:17:10.55 3.0 undecidable manual Pn -1.69 0
IV.RMP.HHZ. 2019-08-22T05:17:05.41 3.0 undecidable manual Pg 1.27 0
IV.CASP.HHZ. 2019-08-22T05:16:55.97 0.3 undecidable manual S 230 0.6214 50 -0.41 65
IV.ASSB.HHZ. 2019-08-22T05:16:53.23 0.6 undecidable manual P 100 0.849 50 2.66 7
IV.ATMI.HHZ. 2019-08-22T05:16:53.71 0.6 undecidable manual S 75 0.5666 50 -1.04 34
IV.MGAB.HHZ. 2019-08-22T05:16:53.41 0.6 undecidable manual S 122 0.5189 50 0.06 48
TV.SF01.EHZ. 2019-08-22T05:16:49.00 0.3 undecidable manual S 175 0.3831 92 0.8 59
IV.TRIF.CHZ. 2019-08-22T05:16:49.77 0.3 undecidable manual S 260 0.4524 92 -1.1 51
IV.RIBO.EHZ.01 2019-08-22T05:16:49.53 0.3 undecidable manual S 235 0.4191 92 -0.07 73
IV.ATPI.EHZ. 2019-08-22T05:16:48.00 0.1 undecidable manual P 68 0.6952 50 0.06 92
IV.OSSC.HHZ. 2019-08-22T05:16:47.92 0.1 undecidable manual S 330 0.3831 92 -0.29 93
IV.PARC.HHZ. 2019-08-22T05:16:47.99 0.1 undecidable manual P 49 0.6961 50 0.04 92
TV.SF13.HHE. 2019-08-22T05:16:47.27 0.1 undecidable manual S 168 0.3822 92 -0.92 75
IV.ATMI.HHZ. 2019-08-22T05:16:47.05 0.3 undecidable manual P 75 0.5666 50 1.31 45
IV.SSP9.EHZ. 2019-08-22T05:16:46.52 0.3 undecidable manual P 50 0.5882 50 0.41 65
IV.CAFI.HHE. 2019-08-22T05:16:46.39 0.3 undecidable manual S 67 0.3561 93 -0.78 60
IV.CASP.HHZ. 2019-08-22T05:16:46.89 0.1 undecidable manual P 230 0.6214 50 0.21 90
IV.CRE.HHZ. 2019-08-22T05:16:45.21 0.1 undecidable manual P 37 0.5315 50 0.08 94
IV.CSNT.HHZ. 2019-08-22T05:16:45.74 0.1 undecidable manual S 330 0.3238 93 -0.17 97
IV.MGAB.HHZ. 2019-08-22T05:16:44.41 0.1 undecidable manual P 122 0.5189 50 -0.52 86
IV.TRIF.CHZ. 2019-08-22T05:16:43.69 0.3 undecidable manual P 260 0.4524 92 0.19 70
IV.FROS.CHZ. 2019-08-22T05:16:43.60 0.1 undecidable manual S 274 0.2608 93 0.1 99
IV.SACS.HHZ. 2019-08-22T05:16:43.39 0.1 undecidable manual P 140 0.4497 92 -0.05 97
TV.SF14.HHE. 2019-08-22T05:16:42.85 0.1 undecidable manual P 170 0.4443 92 -0.47 89
IV.RIBO.EHZ.01 2019-08-22T05:16:42.92 0.1 undecidable manual P 235 0.4191 92 0.15 95
IV.MCIV.CHE. 2019-08-22T05:16:42.94 0.1 undecidable manual P 164 0.4317 92 -0.09 96
TV.SF01.EHZ. 2019-08-22T05:16:42.08 0.1 undecidable manual P 175 0.3831 92 0.12 97
TV.SF13.HHE. 2019-08-22T05:16:42.09 0.1 undecidable manual P 168 0.3822 92 0.14 96
TV.SF04.EHZ. 2019-08-22T05:16:41.98 0.1 undecidable manual P 163 0.3732 92 0.24 94
IV.ARCI.HHZ. 2019-08-22T05:16:41.26 0.1 undecidable manual P 185 0.3426 93 0.2 96
TV.SF11.HHE. 2019-08-22T05:16:41.11 0.1 undecidable manual P 160 0.3462 93 -0.04 99
IV.CAFI.HHE. 2019-08-22T05:16:41.72 0.1 undecidable manual P 67 0.3561 93 0.35 92
IV.OSSC.HHZ. 2019-08-22T05:16:41.87 0.1 undecidable manual P 330 0.3831 92 -0.09 97
IV.CSNT.HHZ. 2019-08-22T05:16:40.64 0.1 undecidable manual P 330 0.3238 93 0 100
IV.FROS.CHZ. 2019-08-22T05:16:40.06 0.1 undecidable manual P 274 0.2608 93 0.81 80
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FROS.CHE. ML:1.8 0.000326 0.36 AML other m 2019-08-22T05:16:43.95
IV.FROS.CHN. ML:1.9 0.000436 1.56 AML other m 2019-08-22T05:16:44.09
IV.CSNT.HHN. ML:1.8 0.00028 0.18 AML other m 2019-08-22T05:16:45.97
IV.CSNT.HHE. ML:1.8 0.000263 1.8 AML other m 2019-08-22T05:16:45.99
IV.ARCI.HHE. ML:1.8 0.00023 1.42 AML other m 2019-08-22T05:16:48.00
IV.ARCI.HHN. ML:1.8 0.0002305 0.92 AML other m 2019-08-22T05:16:48.50
IV.OSSC.HHN. ML:1.6 0.000135 0.4 AML other m 2019-08-22T05:16:48.56
IV.OSSC.HHE. ML:1.5 0.000111 0.2 AML other m 2019-08-22T05:16:48.67
TV.SF01.EHE. ML:2 0.000322 0.28 AML other m 2019-08-22T05:16:49.58
TV.SF01.EHN. ML:2.1 0.0004215 0.22 AML other m 2019-08-22T05:16:49.77
IV.TRIF.CHN. ML:1.8 0.000159 0.12 AML other m 2019-08-22T05:16:50.32
IV.TRIF.CHE. ML:1.6 0.000112 0.58 AML other m 2019-08-22T05:16:51.60
IV.SACS.HHN. ML:1.3 5.335E-5 0.58 AML other m 2019-08-22T05:16:52.50
IV.SACS.HHE. ML:1.4 6.12E-5 0.22 AML other m 2019-08-22T05:16:53.26
IV.MGAB.HHE. ML:1.5 7.295E-5 1.46 AML other m 2019-08-22T05:16:55.83
IV.MGAB.HHN. ML:1.6 8.99E-5 0.22 AML other m 2019-08-22T05:16:55.61
IV.ATMI.HHN. ML:1.9 0.00017 0.58 AML other m 2019-08-22T05:16:56.24
IV.CRE.HHN. ML:1.7 9.945E-5 0.58 AML other m 2019-08-22T05:16:56.43
IV.CASP.HHN. ML:1.3 3.355E-5 0.86 AML other m 2019-08-22T05:16:57.50
IV.CASP.HHE. ML:1.3 3.31E-5 0.64 AML other m 2019-08-22T05:16:57.15
IV.CRE.HHE. ML:1.4 4.79E-5 1.56 AML other m 2019-08-22T05:16:57.80
IV.ATMI.HHE. ML:1.7 9.62E-5 0.44 AML other m 2019-08-22T05:16:59.51
IV.RMP.HHN. ML:2.6 0.000149 0.2 AML other m 2019-08-22T05:17:08.25
IV.RMP.HHE. ML:2.5 0.000113 0.22 AML other m 2019-08-22T05:17:30.10
IV.ARCI.HNE. ML:1.6 0.00017087972 0.1824 AML other m 2019-08-22T05:16:48.00
IV.ARCI.HNN. ML:1.8 0.0002235151 0.1792 AML other m 2019-08-22T05:16:48.50
IV.RIBO.EHE.01 ML:1.7 0.00016061275 0.24 AML other m 2019-08-22T05:16:50.76
IV.MGAB.HNN. ML:1.6 8.5423835E-5 0.1984 AML other m 2019-08-22T05:16:55.72
IV.SSP9.EHE. ML:1.5 6.12701085E-5 0.3616 AML other m 2019-08-22T05:16:59.40
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