Earthquake with magnitude of ML 1.5 on date 08-04-2020 and time 18:53:59 (Italy) in region 5 km N San Casciano dei Bagni (SI)

A magnitude ML 1.5 earthquake occured in region: 5 km N San Casciano dei Bagni (SI), on

  • 08-04-2020 16:53:59 (UTC)
  • 08-04-2020 18:53:59 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.92, 11.87 at 11 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
San Casciano dei Bagni SI 5 1632 1632
Cetona SI 6 2755 4387
Sarteano SI 8 4717 9104
Radicofani SI 8 1097 10201
Città della Pieve PG 12 7712 17913
Chiusi SI 13 8704 26617
Fabro TR 13 2876 29493
Allerona TR 14 1794 31287
Monteleone d'Orvieto TR 15 1467 32754
Abbadia San Salvatore SI 16 6444 39198
Piancastagnaio SI 16 4230 43428
Chianciano Terme SI 16 7105 50533
Proceno VT 18 557 51090
Montegabbione TR 18 1216 52306
Ficulle TR 18 1669 53975
Piegaro PG 19 3669 57644
Acquapendente VT 19 5506 63150

Municipalities with at least 50000 inhabitants

An earthquake occurred to
48 Km W of Perugia (166134 inhabitants)
59 Km NW of Viterbo (67173 inhabitants)
61 Km S of Arezzo (99543 inhabitants)
63 Km SE of Siena (53903 inhabitants)
64 Km E of Grosseto (82087 inhabitants)
68 Km W of Foligno (57155 inhabitants)
75 Km NW of Terni (111501 inhabitants)
92 Km N of Civitavecchia (52991 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 1.5 2020-04-08
16:53:59
42.92 11.87 11 2020-04-08
17:06:58
Sala Sismica INGV-Roma 78017901
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-04-08 16:53:59 ± 0.18
Latitude 42.92 ± 0.01
Longitude 11.87 ± 0.01
Depth (km) 11 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 78017901

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1645
Semi-minor axis of confidence ellipse (meter) 457
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 166
Circular confidence region, given by single value of horizontal uncertainty (meter) 1640
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 193
Number of associated phases, regardless of their use for origin computation 28
Number of defining phases 15
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
Epicentral distance of station farthest from the epicenter (degree) 0.29408
Number of stations at which the event was observed 21
Number of stations from which data was used for origin computation 9
Magnitude information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.2
Num. used stations 13
Type of magnitude ML
Reference to an origin 78017901
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-04-08 17:06:58
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.CAGR.HHZ. 2020-04-08T16:55:26.58 3.0 undecidable manual Pg 10.54 0
IV.SICLA.EHZ. 2020-04-08T16:55:20.15 3.0 positive manual Pg 7.06 0
OT.OT05.EHZ. 2020-04-08T16:55:19.00 3.0 undecidable manual Sg 6.28 0
IV.SPS2.HHZ. 2020-04-08T16:54:58.46 3.0 negative manual Pn -6.56 0
IV.QLNO.HHZ. 2020-04-08T16:54:55.93 3.0 negative manual Pg 9.38 0
IV.MGR.HHZ. 2020-04-08T16:54:51.46 3.0 undecidable manual Pn 0.69 0
IV.ROSPO.HHZ. 2020-04-08T16:54:48.99 3.0 undecidable manual Sn -7.07 0
IV.EUCT.HNZ. 2020-04-08T16:54:47.49 3.0 undecidable manual Pn 0.22 0
IV.BRSN.EHZ. 2020-04-08T16:54:39.33 3.0 undecidable manual S -4.54 0
OT.OT05.EHZ. 2020-04-08T16:54:37.53 3.0 negative manual Pn -0.64 0
IV.CFMN.HHZ. 2020-04-08T16:54:28.44 3.0 undecidable manual Pn -5.46 0
IV.MURB.HHZ. 2020-04-08T16:54:10.90 3.0 undecidable manual S -1.78 0
TV.SF14.HHZ. 2020-04-08T16:54:08.71 0.3 undecidable manual S 229 0.2455 50 -0.19 71
TV.SF01.EHZ. 2020-04-08T16:54:08.55 0.3 undecidable manual S 245 0.2455 50 -0.38 68
IV.SF13.HHZ. 2020-04-08T16:54:07.49 0.3 undecidable manual S 100
IV.MCIV.CHN. 2020-04-08T16:54:07.84 0.6 undecidable manual S 226 0.1961 50 0.4 45
IV.MGAB.HHZ. 2020-04-08T16:54:07.26 0.3 undecidable manual S 91 0.179 50 0.33 69
TV.SF04.EHZ. 2020-04-08T16:54:06.83 0.6 undecidable manual S 242 0.1718 50 0.11 49
IV.ARCI.HHZ. 2020-04-08T16:54:05.70 0.3 undecidable manual P 258 0.2941 50 0.07 72
TV.SF14.HHZ. 2020-04-08T16:54:04.96 0.3 undecidable manual P 229 0.2455 50 0.18 71
TV.SF01.EHZ. 2020-04-08T16:54:04.95 0.6 undecidable manual P 245 0.2455 50 0.15 47
IV.RM33.HNZ. 2020-04-08T16:54:04.67 3.0 undecidable manual P -4.42 0
IV.MGAB.HHZ. 2020-04-08T16:54:03.16 0.3 undecidable manual P 91 0.179 50 -0.49 67
TV.SF04.EHZ. 2020-04-08T16:54:03.36 1.0 undecidable manual P 242 0.1718 50 -0.17 24
IV.SACS.HHZ. 2020-04-08T16:54:03.85 0.3 undecidable manual S 155 0.0728 144 -0.03 75
TV.SF11.HHZ. 2020-04-08T16:54:03.37 0.6 undecidable manual P 252 0.1457 124 0.29 47
IV.MCIV.CHN. 2020-04-08T16:54:03.92 0.6 undecidable manual P 226 0.1961 50 -0.02 49
IV.SACS.HHZ. 2020-04-08T16:54:01.83 0.1 undecidable manual P 155 0.0728 144 -0.06 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SACS.HHN. ML:1.6 0.0004755 0.62 AML other m 2020-04-08T16:54:05.68
IV.SACS.HHE. ML:1.6 0.000576 1.34 AML other m 2020-04-08T16:54:05.98
TV.SF04.EHN. ML:1.3 0.000151 0.26 AML other m 2020-04-08T16:54:07.63
TV.SF04.EHE. ML:1.3 0.0001474 0.48 AML other m 2020-04-08T16:54:08.82
IV.MGAB.HHE. ML:1.6 0.0002635 0.42 AML other m 2020-04-08T16:54:09.70
IV.MGAB.HNE. ML:1.5 0.0002235 0.42 AML other m 2020-04-08T16:54:09.49
IV.MGAB.HNN. ML:1.3 0.0001565 0.42 AML other m 2020-04-08T16:54:11.34
IV.MGAB.HHN. ML:1.4 0.000181 0.32 AML other m 2020-04-08T16:54:11.35
IV.ARCI.HHN. ML:0.9 3.54E-5 0.36 AML other m 2020-04-08T16:54:12.02
IV.ARCI.HHE. ML:0.9 3.255E-5 0.6 AML other m 2020-04-08T16:54:13.11
IV.MURB.HHE. ML:1.8 0.0001165 1.32 AML other m 2020-04-08T16:54:22.21
IV.SACS.HNE. ML:1.7 0.00060486655 0.512 AML other m 2020-04-08T16:54:05.98
IV.SACS.HNN. ML:1.6 0.00049946465 0.576 AML other m 2020-04-08T16:54:04.61
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