Earthquake with magnitude of ML 1.1 on date 23-02-2020 and time 10:31:22 (Italy) in region 4 km SE Gualdo Tadino (PG)

A magnitude ML 1.1 earthquake occured in region: 4 km SE Gualdo Tadino (PG), on

  • 23-02-2020 09:31:22 (UTC)
  • 23-02-2020 10:31:22 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.21, 12.83 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
Gualdo Tadino PG 5 15208 15208
Fiuminata MC 9 1402 16610
Esanatoglia MC 11 2034 18644
Fossato di Vico PG 11 2840 21484
Nocera Umbra PG 11 5839 27323
Sefro MC 12 422 27745
Pioraco MC 13 1134 28879
Fabriano AN 15 31480 60359
Matelica MC 15 9981 70340
Sigillo PG 16 2404 72744
Cerreto d'Esi AN 18 3817 76561
Valtopina PG 18 1398 77959
Serravalle di Chienti MC 18 1070 79029
Castelraimondo MC 18 4587 83616
Costacciaro PG 19 1216 84832
Valfabbrica PG 19 3389 88221
Gagliole MC 20 620 88841

Municipalities with at least 50000 inhabitants

An earthquake occurred to
30 Km NE of Foligno (57155 inhabitants)
38 Km E of Perugia (166134 inhabitants)
72 Km SW of Ancona (100861 inhabitants)
72 Km S of Fano (60888 inhabitants)
74 Km N of Terni (111501 inhabitants)
78 Km S of Pesaro (94582 inhabitants)
82 Km E of Arezzo (99543 inhabitants)
94 Km NW of Teramo (54892 inhabitants)
97 Km S of Rimini (147750 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 2020-02-23
09:31:22
43.21 12.83 11 2020-02-23
09:37:15
Sala Sismica INGV-Roma 76745711
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-02-23 09:31:22 ± 0.05
Latitude 43.21 ± 0.00
Longitude 12.83 ± 0.00
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 76745711

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 361
Semi-minor axis of confidence ellipse (meter) 263
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 299
Circular confidence region, given by single value of horizontal uncertainty (meter) 360
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 105
Number of associated phases, regardless of their use for origin computation 12
Number of defining phases 12
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.13
Epicentral distance of station closest to the epicenter (degree) 0.09173
Epicentral distance of station farthest from the epicenter (degree) 0.29947
Number of stations at which the event was observed 6
Number of stations from which data was used for origin computation 6
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.3
Num. used stations 8
Type of magnitude ML
Reference to an origin 76745711
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-02-23 09:37:15
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.ARVD.HHZ. 2020-02-23T09:31:33.24 0.3 undecidable manual S 15 0.2995 50 -0.12 71
IV.EL6.EHZ. 2020-02-23T09:31:31.44 0.6 undecidable manual S 58 0.2302 50 0.14 48
IV.MURB.HHZ. 2020-02-23T09:31:31.46 0.6 undecidable manual S 284 0.2302 50 0.17 48
IV.CESI.HHZ. 2020-02-23T09:31:30.64 0.1 undecidable manual S 165 0.2113 50 -0.09 97
IV.ARVD.HHZ. 2020-02-23T09:31:28.30 0.1 undecidable manual P 15 0.2995 50 -0.26 92
IV.ATCC.EHZ. 2020-02-23T09:31:28.69 0.1 undecidable manual S 260 0.1421 125 0.02 100
IV.SNTG.HHZ. 2020-02-23T09:31:27.21 0.6 undecidable manual S 60 0.0917 137 0 50
IV.EL6.EHZ. 2020-02-23T09:31:27.45 0.6 negative manual P 58 0.2302 50 0.08 48
IV.MURB.HHZ. 2020-02-23T09:31:27.47 0.6 negative manual P 284 0.2302 50 0.1 48
IV.CESI.HHZ. 2020-02-23T09:31:26.99 0.1 undecidable manual P 165 0.2113 50 -0.06 98
IV.ATCC.EHZ. 2020-02-23T09:31:25.92 0.1 undecidable manual P 260 0.1421 125 0.07 99
IV.SNTG.HHZ. 2020-02-23T09:31:25.26 0.6 negative manual P 60 0.0917 137 0.25 48
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SNTG.HHE. ML:0.8 7.795E-5 0.22 AML other m 2020-02-23T09:31:27.37
IV.SNTG.HHN. ML:1.1 0.0001435 0.16 AML other m 2020-02-23T09:31:27.59
IV.MURB.HHE. ML:1.2 9.385E-5 1.76 AML other m 2020-02-23T09:31:31.91
IV.MURB.HHN. ML:1.2 7.835E-5 0.32 AML other m 2020-02-23T09:31:32.10
IV.EL6.EHE. ML:1.4 0.00015495 1.68 AML other m 2020-02-23T09:31:32.99
IV.EL6.EHN. ML:1.5 0.000169 0.22 AML other m 2020-02-23T09:31:32.09
IV.FDMO.HHE. ML:0.8 3.015E-5 0.16 AML other m 2020-02-23T09:31:32.43
IV.FDMO.HHN. ML:0.8 3.125E-5 0.5 AML other m 2020-02-23T09:31:32.96
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