Earthquake with magnitude of ML 0.9 on date 23-02-2021 and time 18:58:12 (UTC) in region 2 km E Fiordimonte (MC)

A magnitude ML 0.9 earthquake occured in region: 2 km E Fiordimonte (MC), on

  • 23-02-2021 18:58:12 (UTC)
  • 23-02-2021 19:58:12 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.04, 13.12 at 7 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
Fiordimonte MC 2 202 202
Fiastra MC 3 559 761
Pievebovigliana MC 4 866 1627
Acquacanina MC 5 121 1748
Pieve Torina MC 6 1458 3206
Muccia MC 8 915 4121
Bolognola MC 10 142 4263
Ussita MC 10 444 4707
Monte Cavallo MC 11 145 4852
Visso MC 12 1107 5959
Camerino MC 12 6974 12933
Serravalle di Chienti MC 14 1070 14003
Cessapalombo MC 14 512 14515
Caldarola MC 15 1823 16338
Sarnano MC 15 3264 19602
Castelsantangelo sul Nera MC 16 281 19883
Camporotondo di Fiastrone MC 16 563 20446
Serrapetrona MC 17 966 21412
Belforte del Chienti MC 17 1886 23298
San Ginesio MC 18 3498 26796
Gualdo MC 18 815 27611
Sefro MC 19 422 28033
Preci PG 19 724 28757
Pioraco MC 19 1134 29891

Municipalities with at least 50000 inhabitants

An earthquake occurred to
35 Km E of Foligno (57155 inhabitants)
60 Km E of Perugia (166134 inhabitants)
64 Km NW of Teramo (54892 inhabitants)
65 Km NE of Terni (111501 inhabitants)
72 Km SW of Ancona (100861 inhabitants)
79 Km N of L'Aquila (69753 inhabitants)
90 Km S of Fano (60888 inhabitants)
99 Km S of Pesaro (94582 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
Reviewed
Rev100
ML 0.9 2021-02-23
18:58:12
43.04 13.12 7 2021-02-23
19:26:23
Sala Sismica INGV-Roma 87415451
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-02-23 18:58:12 ± 0.28
Latitude 43.04 ± 0.01
Longitude 13.12 ± 0.00
Depth (km) 7 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 87415451

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 628
Semi-minor axis of confidence ellipse (meter) 147
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 189
Circular confidence region, given by single value of horizontal uncertainty (meter) 630
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 102
Number of associated phases, regardless of their use for origin computation 14
Number of defining phases 14
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.28
Epicentral distance of station closest to the epicenter (degree) 0.08454
Epicentral distance of station farthest from the epicenter (degree) 0.25361
Number of stations at which the event was observed 7
Number of stations from which data was used for origin computation 7
Magnitude information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.3
Num. used stations 4
Type of magnitude ML
Reference to an origin 87415451
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-02-23 19:26:23
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.MF5.EHZ. 2021-02-23T18:58:23.99 0.3 undecidable manual S 101 0.2536 104 0.95 55
IV.MMO1.EHZ. 2021-02-23T18:58:20.80 0.3 undecidable manual S 132 0.2041 107 -0.41 68
IV.CESI.HHZ. 2021-02-23T18:58:19.90 0.3 undecidable manual S 259 0.1592 112 0.31 70
IV.MML1.HNZ. 2021-02-23T18:58:18.70 0.3 undecidable manual S 306 0.1331 116 0.05 74
IV.MC2.EHZ. 2021-02-23T18:58:18.71 0.3 undecidable manual S 158 0.134 115 0.01 75
IV.MF5.EHZ. 2021-02-23T18:58:18.93 1.0 negative manual P 101 0.2536 104 0.14 24
IV.CSP1.EHZ. 2021-02-23T18:58:17.01 0.1 undecidable manual S 48 0.0845 127 -0.04 100
IV.MMO1.EHZ. 2021-02-23T18:58:17.24 1.0 positive manual P 132 0.2041 107 -0.49 22
IT.MTCL.HGE. 2021-02-23T18:58:17.49 0.3 undecidable manual S 245 0.0971 123 0.05 75
IV.MC2.EHZ. 2021-02-23T18:58:16.02 1.0 positive manual P 158 0.134 115 -0.25 24
IV.CESI.HHZ. 2021-02-23T18:58:16.80 0.1 positive manual P 259 0.1592 112 0 99
IV.MML1.HNZ. 2021-02-23T18:58:16.12 0.1 undecidable manual P 306 0.1331 116 -0.14 97
IT.MTCL.HGE. 2021-02-23T18:58:15.47 0.3 undecidable manual P 245 0.0971 123 -0.08 74
IV.CSP1.EHZ. 2021-02-23T18:58:15.13 0.1 positive manual P 48 0.0845 127 -0.19 97
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CESI.HHE. ML:0.6 4.055E-5 0.7 AML other m 2021-02-23T18:58:20.97
IV.CESI.HHN. ML:0.6 3.98E-5 1.44 AML other m 2021-02-23T18:58:20.73
IV.CSP1.EHE. ML:1.2 0.00022897153 0.1408 AML other m 2021-02-23T18:58:16.96
IV.CSP1.EHN. ML:1.1 0.0001874487 0.192 AML other m 2021-02-23T18:58:18.52
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