Earthquake with magnitude of ML 1.7 on date 20-02-2020 and time 13:00:10 (Italy) in region 1 km NW Castel Ritaldi (PG)

A magnitude ML 1.7 earthquake occured in region: 1 km NW Castel Ritaldi (PG), on

  • 20-02-2020 12:00:10 (UTC)
  • 20-02-2020 13:00:10 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.83, 12.66 at 9 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
Castel Ritaldi PG 1 3278 3278
Giano dell'Umbria PG 7 3846 7124
Montefalco PG 7 5679 12803
Trevi PG 9 8469 21272
Campello sul Clitunno PG 10 2442 23714
Gualdo Cattaneo PG 12 6155 29869
Bevagna PG 12 5081 34950
Spoleto PG 13 38218 73168
Massa Martana PG 13 3770 76938
Foligno PG 14 57155 134093
Vallo di Nera PG 18 364 134457
Spello PG 18 8645 143102
Sant'Anatolia di Narco PG 18 564 143666
Acquasparta TR 18 4778 148444
Scheggino PG 19 461 148905
Cannara PG 19 4305 153210
Collazzone PG 20 3473 156683

Municipalities with at least 50000 inhabitants

An earthquake occurred to
14 Km S of Foligno (57155 inhabitants)
30 Km N of Terni (111501 inhabitants)
38 Km SE of Perugia (166134 inhabitants)
65 Km NE of Viterbo (67173 inhabitants)
81 Km NW of L'Aquila (69753 inhabitants)
87 Km W of Teramo (54892 inhabitants)
93 Km N of Guidonia Montecelio (88673 inhabitants)
95 Km SE of Arezzo (99543 inhabitants)
97 Km N of Tivoli (56533 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 2020-02-20
12:00:10
42.83 12.66 9 2020-02-20
12:08:14
Sala Sismica INGV-Roma 76671421
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-02-20 12:00:10 ± 0.07
Latitude 42.83 ± 0.00
Longitude 12.66 ± 0.00
Depth (km) 9 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 76671421

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 411
Semi-minor axis of confidence ellipse (meter) 403
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 297
Circular confidence region, given by single value of horizontal uncertainty (meter) 410
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 65
Number of associated phases, regardless of their use for origin computation 24
Number of defining phases 20
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) 0.59085
Number of stations at which the event was observed 14
Number of stations from which data was used for origin computation 11
Magnitude information

ML:1.7

Field Value
Value 1.7
Uncertainty 0.3
Num. used stations 8
Type of magnitude ML
Reference to an origin 76671421
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-02-20 12:08:14
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.EL6.EHZ. 2020-02-20T12:00:31.86 0.3 undecidable manual S 33 0.5909 50 0.51 61
IV.CSP1.EHZ. 2020-02-20T12:00:27.96 0.3 undecidable manual S 57 0.4739 50 0.08 69
IV.MGAB.HNE. 2020-02-20T12:00:26.25 0.6 undecidable manual S 281 0.411 50 0.25 45
IV.ATTE.HNZ. 2020-02-20T12:00:26.62 0.6 undecidable manual S 328 0.429 50 0.07 46
IV.LNSS.HHZ. 2020-02-20T12:00:24.75 0.6 undecidable manual S 129 0.3597 50 0.25 45
IV.EL6.EHZ. 2020-02-20T12:00:22.55 0.3 undecidable manual P 33 0.5909 50 -0.12 67
IV.MMO1.EHZ. 2020-02-20T12:00:20.66 0.3 undecidable manual P 82 0.491 50 -0.3 65
IV.CESX.HHE. 2020-02-20T12:00:20.18 0.6 undecidable manual S 194 0.2302 108 0.01 49
IV.ATTE.HNZ. 2020-02-20T12:00:20.32 0.3 undecidable manual P 328 0.429 50 0.42 65
IV.CESI.HHZ. 2020-02-20T12:00:20.77 0.3 undecidable manual S 46 0.2473 107 -0.02 73
IV.GAVE.EHZ. 2020-02-20T12:00:20.26 0.3 undecidable manual S 129 0.2203 109 0.46 67
IV.CSP1.EHZ. 2020-02-20T12:00:20.54 0.3 undecidable manual P 57 0.4739 50 -0.13 68
IV.MGAB.HNE. 2020-02-20T12:00:19.25 0.3 undecidable manual P 281 0.411 50 -0.33 66
IV.MC2.EHZ. 2020-02-20T12:00:19.20 3.0 negative manual P 0.03 0
IV.LNSS.HHZ. 2020-02-20T12:00:18.49 0.3 undecidable manual P 129 0.3597 50 -0.23 68
IV.FDMO.HHZ. 2020-02-20T12:00:18.64 3.0 undecidable manual S 0
IV.ATCC.EHZ. 2020-02-20T12:00:18.69 3.0 undecidable manual P 0.41 0
IV.NRCA.HHZ. 2020-02-20T12:00:17.89 0.1 undecidable manual P 90 0.331 50 -0.33 90
IV.CESI.HHZ. 2020-02-20T12:00:16.33 0.1 undecidable manual P 46 0.2473 107 -0.25 93
IV.GAVE.EHZ. 2020-02-20T12:00:16.16 0.1 undecidable manual P 129 0.2203 109 0.16 95
IV.FDMO.HHZ. 2020-02-20T12:00:16.93 3.0 undecidable manual P 0
IV.CESX.HHE. 2020-02-20T12:00:16.00 0.3 undecidable manual P 194 0.2302 108 -0.22 70
IV.MOMA.HHZ. 2020-02-20T12:00:14.95 0.1 undecidable manual S 247 0.0737 136 0.04 100
IV.MOMA.HHZ. 2020-02-20T12:00:13.24 0.1 undecidable manual P 247 0.0737 136 0.06 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MOMA.HNN. ML:1.9 0.001366 0.14 AML other m 2020-02-20T12:00:15.25
IV.MOMA.HHN. ML:2 0.00156 0.14 AML other m 2020-02-20T12:00:15.25
IV.MOMA.HNE. ML:1.9 0.00128 0.18 AML other m 2020-02-20T12:00:15.49
IV.MOMA.HHE. ML:2 0.0014 0.2 AML other m 2020-02-20T12:00:15.50
IV.GAVE.EHN. ML:1.2 9.8E-5 0.16 AML other m 2020-02-20T12:00:21.59
IV.GAVE.EHE. ML:1.3 0.0001215 0.16 AML other m 2020-02-20T12:00:22.21
IV.NRCA.HHE. ML:1.3 7.74E-5 0.54 AML other m 2020-02-20T12:00:25.02
IV.NRCA.HHN. ML:1.4 0.000106 0.58 AML other m 2020-02-20T12:00:25.94
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