Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.1 on date 24-02-2021 and time 19:44:56 (UTC) in region 2 km E Castelsantangelo sul Nera (MC)

A magnitude ML 1.1 earthquake occured in region: 2 km E Castelsantangelo sul Nera (MC), on

  • 24-02-2021 19:44:56 (UTC)
  • 24-02-2021 20:44:56 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.8960, 13.1790 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.

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Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Castelsantangelo sul Nera MC 2 281 281
Ussita MC 6 444 725
Visso MC 8 1107 1832
Preci PG 12 724 2556
Bolognola MC 12 142 2698
Montemonaco AP 12 604 3302
Norcia PG 13 4957 8259
Montegallo AP 14 523 8782
Montefortino FM 14 1178 9960
Acquacanina MC 15 121 10081
Fiastra MC 16 559 10640
Arquata del Tronto AP 17 1178 11818
Amandola FM 17 3629 15447
Fiordimonte MC 17 202 15649
Monte Cavallo MC 18 145 15794
Sarnano MC 19 3264 19058
Pieve Torina MC 20 1458 20516

Municipalities with at least 50000 inhabitants

An earthquake occurred to
39 Km E of Foligno (57155 inhabitants)
50 Km NW of Teramo (54892 inhabitants)
57 Km NE of Terni (111501 inhabitants)
63 Km N of L'Aquila (69753 inhabitants)
68 Km E of Perugia (166134 inhabitants)
85 Km SW of Ancona (100861 inhabitants)
90 Km W of Montesilvano (53738 inhabitants)
97 Km NW of Pescara (121014 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100 		ML 1.1 2021-02-24
19:44:56		 42.8958 13.1788 7 2021-02-24
20:10:35		 Sala Sismica INGV-Roma 87458361
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-02-24 19:44:56 ± 0.08
Latitude 42.8958 ± 0.0027
Longitude 13.1788 ± 0.0049
Depth (km) 7 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 87458361

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 399
Semi-minor axis of confidence ellipse (meter) 92
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 72
Circular confidence region, given by single value of horizontal uncertainty (meter) 400.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 73
Number of associated phases, regardless of their use for origin computation 24
Number of defining phases 24
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.24
Epicentral distance of station closest to the epicenter (degree) 0.01709
Epicentral distance of station farthest from the epicenter (degree) 0.43707
Number of stations at which the event was observed 13
Number of stations from which data was used for origin computation 13
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.3
Num. used stations 10
Type of magnitude ML
Reference to an origin 87458361
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-02-24 20:10:35
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.EL6.EHZ. 2021-02-24T19:45:13.17 0.3 undecidable manual S 353 48.5181 50 0.11 70
IV.GAVE.HNZ. 2021-02-24T19:45:08.24 0.3 undecidable manual S 226 32.3454 103 -0.09 72
IV.SMA1.EHZ. 2021-02-24T19:45:08.18 0.3 undecidable manual S 157 32.0457 103 -0.05 73
IV.CESI.HHZ. 2021-02-24T19:45:06.26 0.3 undecidable manual S 299 25.3524 106 0.28 70
IV.PF6.EHZ. 2021-02-24T19:45:06.29 0.3 undecidable manual S 3 26.8509 105 -0.2 72
IV.MTRA.HNZ. 2021-02-24T19:45:05.70 0.6 undecidable manual S 131 23.4543 107 0.35 46
IV.EL6.EHZ. 2021-02-24T19:45:05.63 0.3 undecidable manual P 353 48.5181 50 -0.56 63
IV.CSP1.EHZ. 2021-02-24T19:45:05.03 0.3 undecidable manual S 6 21.867 108 0.22 72
IV.SMA1.EHZ. 2021-02-24T19:45:03.00 0.3 undecidable manual P 157 32.0457 103 -0.41 68
IV.T1299.HNZ. 2021-02-24T19:45:03.08 0.6 undecidable manual P 164 30.2475 104 0.03 49
IV.GAVE.HNZ. 2021-02-24T19:45:03.17 0.6 undecidable manual P 226 32.3454 103 -0.3 46
IV.MF5.EHZ. 2021-02-24T19:45:02.50 0.6 undecidable manual P 66 24.9528 106 0.47 45
IV.PF6.EHZ. 2021-02-24T19:45:02.25 0.3 undecidable manual P 3 26.8509 105 -0.15 72
IV.FEMA.HNZ. 2021-02-24T19:45:02.00 0.3 undecidable manual S 305 12.7761 120 0.06 75
IV.CSP1.EHZ. 2021-02-24T19:45:01.33 1.0 undecidable manual P 6 21.867 108 -0.11 25
IV.CESI.HHZ. 2021-02-24T19:45:01.98 0.3 undecidable manual P 299 25.3524 106 -0.13 73
IV.MTRA.HNZ. 2021-02-24T19:45:01.86 0.3 undecidable manual P 131 23.4543 107 0.11 73
IV.MMO1.EHZ. 2021-02-24T19:45:01.83 0.3 undecidable manual S 88 11.9769 121 0.13 74
IV.FEMA.HNZ. 2021-02-24T19:45:00.32 0.3 undecidable manual P 305 12.7761 120 0.55 67
IV.NRCA.HHZ. 2021-02-24T19:45:00.92 0.3 undecidable manual S 217 8.6802 130 0.17 74
IV.NRCA.HHZ. 2021-02-24T19:44:59.21 0.1 undecidable manual P 217 8.6802 130 0.12 100
IV.MMO1.EHZ. 2021-02-24T19:44:59.79 0.1 undecidable manual P 88 11.9769 121 0.15 99
IV.MC2.EHZ. 2021-02-24T19:44:58.88 0.3 undecidable manual S 25 1.8981 165 -0.56 68
IV.MC2.EHZ. 2021-02-24T19:44:58.11 0.1 undecidable manual P 25 1.8981 165 -0.22 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CSP1.EHE. ML:1.0 0.00007796102 0.32 AML other m 2021-02-24T19:45:07.07
IV.CESI.HHN. ML:1.0 0.00005855000000000001 0.1 AML other m 2021-02-24T19:45:07.76
IV.CESI.HHE. ML:0.7 0.000030900000000000006 1.1 AML other m 2021-02-24T19:45:08.12
IV.CSP1.EHN. ML:0.9 0.000059714024 0.2176 AML other m 2021-02-24T19:45:06.89
IV.SMA1.EHE. ML:0.9 0.00003825 0.7 AML other m 2021-02-24T19:45:13.61
IV.SMA1.EHN. ML:0.8 0.000030449999999999998 0.42 AML other m 2021-02-24T19:45:14.61
IV.NRCA.HHE. ML:1.7 0.0008269181 0.1792 AML other m 2021-02-24T19:45:01.16
IV.NRCA.HHN. ML:1.5 0.00055522585 0.0768 AML other m 2021-02-24T19:45:01.06
IV.NRCA.HNE. ML:1.7 0.0007583187499999999 0.1792 AML other m 2021-02-24T19:45:01.16
IV.NRCA.HNN. ML:1.5 0.00052411811 0.1024 AML other m 2021-02-24T19:45:01.05
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download