Earthquake with magnitude of ML 1.2 on date 25-02-2020 and time 23:31:14 (Italy) in region 4 km N Spoleto (PG)

A magnitude ML 1.2 earthquake occured in region: 4 km N Spoleto (PG), on

  • 25-02-2020 22:31:14 (UTC)
  • 25-02-2020 23:31:14 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.78, 12.73 at 8 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
Spoleto PG 5 38218 38218
Campello sul Clitunno PG 6 2442 40660
Castel Ritaldi PG 7 3278 43938
Sant'Anatolia di Narco PG 10 564 44502
Scheggino PG 11 461 44963
Vallo di Nera PG 11 364 45327
Trevi PG 12 8469 53796
Giano dell'Umbria PG 14 3846 57642
Montefalco PG 15 5679 63321
Cerreto di Spoleto PG 16 1075 64396
Massa Martana PG 17 3770 68166
Acquasparta TR 18 4778 72944
Ferentillo TR 18 1913 74857
Poggiodomo PG 18 117 74974
Montefranco TR 20 1276 76250

Municipalities with at least 50000 inhabitants

An earthquake occurred to
20 Km S of Foligno (57155 inhabitants)
25 Km N of Terni (111501 inhabitants)
46 Km SE of Perugia (166134 inhabitants)
65 Km NE of Viterbo (67173 inhabitants)
72 Km NW of L'Aquila (69753 inhabitants)
81 Km W of Teramo (54892 inhabitants)
86 Km N of Guidonia Montecelio (88673 inhabitants)
90 Km N of Tivoli (56533 inhabitants)
100 Km N of Roma (2864731 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 1.2 2020-02-25
22:31:14
42.78 12.73 8 2020-02-25
22:37:25
Sala Sismica INGV-Roma 76810831
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-02-25 22:31:14 ± 0.06
Latitude 42.78 ± 0.00
Longitude 12.73 ± 0.00
Depth (km) 8 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 76810831

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 295
Semi-minor axis of confidence ellipse (meter) 238
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 143
Circular confidence region, given by single value of horizontal uncertainty (meter) 290
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 176
Number of associated phases, regardless of their use for origin computation 21
Number of defining phases 14
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.12
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.46855
Number of stations at which the event was observed 13
Number of stations from which data was used for origin computation 7
Magnitude information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.1
Num. used stations 10
Type of magnitude ML
Reference to an origin 76810831
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-02-25 22:37:25
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.CAFE.HHZ. 2020-02-25T22:32:41.50 3.0 undecidable manual Sg 2.97 0
IV.ROSPO.HHZ. 2020-02-25T22:32:25.08 3.0 undecidable manual Sn 0.11 0
IV.BRSN.EHZ. 2020-02-25T22:31:55.71 3.0 undecidable manual Sg 3.96 0
IV.ROSPO.HHZ. 2020-02-25T22:31:44.92 3.0 undecidable manual Pg 3.82 0
IV.PTRJ.HNZ. 2020-02-25T22:31:37.37 3.0 undecidable manual Pn -2.78 0
IV.FIR.HHZ. 2020-02-25T22:31:32.46 3.0 undecidable manual S -0.57 0
IV.CSP1.EHZ. 2020-02-25T22:31:31.28 0.1 undecidable manual S 47 0.4685 50 0 95
IV.MMO1.EHZ. 2020-02-25T22:31:30.85 0.1 undecidable manual S 74 0.4533 50 0.03 95
IV.FDMO.HHZ. 2020-02-25T22:31:28.50 0.1 undecidable manual S 45 0.3687 50 0.19 94
IV.LNSS.HHZ. 2020-02-25T22:31:25.60 0.1 undecidable manual S 127 0.2842 105 -0.03 98
IV.NRCA.HHZ. 2020-02-25T22:31:25.84 0.1 undecidable manual S 78 0.286 105 0.14 96
IV.CSP1.EHZ. 2020-02-25T22:31:24.00 0.1 undecidable manual P 47 0.4685 50 -0.11 93
IV.CESI.HHZ. 2020-02-25T22:31:24.74 0.1 undecidable manual S 29 0.2626 106 -0.06 98
IV.MMO1.EHZ. 2020-02-25T22:31:23.61 0.6 positive manual P 74 0.4533 50 -0.23 46
IV.CESX.HHZ. 2020-02-25T22:31:22.47 0.1 undecidable manual S 213 0.1979 111 0.03 100
IV.FDMO.HHZ. 2020-02-25T22:31:22.09 1.0 negative manual P 45 0.3687 50 -0.3 23
IV.CPGN.HNZ. 2020-02-25T22:31:21.17 3.0 undecidable manual P 1.56 0
IV.CESI.HHZ. 2020-02-25T22:31:20.40 0.6 positive manual P 29 0.2626 106 0.03 49
IV.LNSS.HHZ. 2020-02-25T22:31:20.71 0.3 undecidable manual P 127 0.2842 105 -0.13 72
IV.NRCA.HHZ. 2020-02-25T22:31:20.85 0.1 negative manual P 78 0.286 105 -0.03 98
IV.CESX.HHZ. 2020-02-25T22:31:19.20 0.6 negative manual P 213 0.1979 111 0.2 48
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CESX.HHN. ML:1.1 8.92E-5 1.6 AML other m 2020-02-25T22:31:22.93
IV.CESX.HHE. ML:1.1 8.74E-5 0.86 AML other m 2020-02-25T22:31:23.52
IV.LNSS.HHE. ML:1.2 8.195E-5 0.92 AML other m 2020-02-25T22:31:25.29
IV.CESI.HHE. ML:1 4.565E-5 1.32 AML other m 2020-02-25T22:31:26.32
IV.NRCA.HHE. ML:1.4 0.000111 0.12 AML other m 2020-02-25T22:31:26.43
IV.CESI.HHN. ML:1.2 7.72E-5 0.92 AML other m 2020-02-25T22:31:26.50
IV.NRCA.HHN. ML:1.2 7.67E-5 1.86 AML other m 2020-02-25T22:31:27.00
IV.LNSS.HHN. ML:1.3 8.545E-5 0.42 AML other m 2020-02-25T22:31:27.35
IV.RM33.EHN. ML:1.2 4.355E-5 0.48 AML other m 2020-02-25T22:31:34.28
IV.RM33.EHE. ML:1.1 3.345E-5 0.42 AML other m 2020-02-25T22:31:54.23
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