Earthquake with magnitude of ML 1.1 on date 28-02-2021 and time 23:35:34 (Italy) in region 2 km N Ussita (MC)

A magnitude ML 1.1 earthquake occured in region: 2 km N Ussita (MC), on

  • 28-02-2021 22:35:34 (UTC)
  • 28-02-2021 23:35:34 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.9610, 13.1370 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
Ussita MC 2 444 444
Visso MC 5 1107 1551
Castelsantangelo sul Nera MC 7 281 1832
Bolognola MC 8 142 1974
Acquacanina MC 8 121 2095
Fiastra MC 9 559 2654
Fiordimonte MC 9 202 2856
Monte Cavallo MC 12 145 3001
Pieve Torina MC 12 1458 4459
Preci PG 12 724 5183
Pievebovigliana MC 12 866 6049
Muccia MC 16 915 6964
Sarnano MC 16 3264 10228
Montefortino FM 17 1178 11406
Montemonaco AP 17 604 12010
Amandola FM 18 3629 15639
Sellano PG 19 1079 16718
Norcia PG 19 4957 21675
Cessapalombo MC 19 512 22187
Serravalle di Chienti MC 19 1070 23257

Municipalities with at least 50000 inhabitants

An earthquake occurred to
35 Km E of Foligno (57155 inhabitants)
57 Km NW of Teramo (54892 inhabitants)
60 Km NE of Terni (111501 inhabitants)
63 Km E of Perugia (166134 inhabitants)
71 Km NW of L'Aquila (69753 inhabitants)
79 Km SW of Ancona (100861 inhabitants)
97 Km NW of Montesilvano (53738 inhabitants)
99 Km S of Fano (60888 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 2021-02-28
22:35:34
42.9612 13.137 9 2021-02-28
23:12:59
Sala Sismica INGV-Roma 87585021
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-02-28 22:35:34 ± 0.1
Latitude 42.9612 ± 0.0036
Longitude 13.1370 ± 0.0037
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 87585021

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 349
Semi-minor axis of confidence ellipse (meter) 162
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 38
Circular confidence region, given by single value of horizontal uncertainty (meter) 350.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 84
Number of associated phases, regardless of their use for origin computation 23
Number of defining phases 23
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.21
Epicentral distance of station closest to the epicenter (degree) 0.06295
Epicentral distance of station farthest from the epicenter (degree) 0.36872
Number of stations at which the event was observed 12
Number of stations from which data was used for origin computation 12
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.2
Num. used stations 12
Type of magnitude ML
Reference to an origin 87585021
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-02-28 23:12:59
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.EL6.EHZ. 2021-02-28T22:35:48.80 1.0 undecidable manual S 356 40.9257 50 0.24 23
IV.MF5.EHZ. 2021-02-28T22:35:45.29 0.6 undecidable manual S 83 26.3514 108 1.04 36
IV.EL6.EHZ. 2021-02-28T22:35:42.48 0.3 undecidable manual P 356 40.9257 50 -0.19 70
IV.CESI.HHZ. 2021-02-28T22:35:42.38 0.3 undecidable manual S 285 19.4694 114 0.37 70
IV.MML1.HNZ. 2021-02-28T22:35:42.96 0.3 undecidable manual S 322 21.5673 112 0.27 71
IV.PF6.EHZ. 2021-02-28T22:35:42.20 0.3 undecidable manual S 13 20.1687 113 -0.03 75
IV.MMO1.EHZ. 2021-02-28T22:35:41.08 0.3 undecidable manual S 114 16.872 117 -0.12 74
IV.NRCA.HHZ. 2021-02-28T22:35:40.54 0.3 undecidable manual S 187 14.2746 121 0.13 74
IV.CSP1.EHZ. 2021-02-28T22:35:40.83 0.3 undecidable manual S 21 15.4734 119 0.05 75
IV.MF5.EHZ. 2021-02-28T22:35:40.53 0.3 undecidable manual P 83 26.3514 108 0.35 69
IV.CESI.HHZ. 2021-02-28T22:35:39.02 0.1 undecidable manual P 285 19.4694 114 0.13 98
IV.MML1.HNZ. 2021-02-28T22:35:39.14 0.1 undecidable manual P 322 21.5673 112 -0.14 97
IT.MTCL.HGZ. 2021-02-28T22:35:39.64 0.3 undecidable manual S 288 11.7771 126 -0.04 76
IV.CSP1.EHZ. 2021-02-28T22:35:38.07 0.1 undecidable manual P 21 15.4734 119 -0.11 99
IV.FDMO.HHZ. 2021-02-28T22:35:38.82 0.3 undecidable manual S 334 9.2796 133 -0.2 74
IV.MMO1.EHZ. 2021-02-28T22:35:38.22 0.3 undecidable manual P 114 16.872 117 -0.2 73
IV.PF6.EHZ. 2021-02-28T22:35:38.87 0.6 undecidable manual P 13 20.1687 113 -0.15 49
IV.FEMA.HNZ. 2021-02-28T22:35:38.61 0.3 undecidable manual S 271 7.0929 141 0.11 75
IT.MTCL.HGZ. 2021-02-28T22:35:37.47 0.3 undecidable manual P 288 11.7771 126 -0.08 75
IV.NRCA.HHZ. 2021-02-28T22:35:37.90 0.1 undecidable manual P 187 14.2746 121 -0.07 100
IV.FEMA.HNZ. 2021-02-28T22:35:36.81 0.3 undecidable manual P 271 7.0929 141 -0.05 76
IV.FDMO.HHZ. 2021-02-28T22:35:36.98 0.1 undecidable manual P 334 9.2796 133 -0.19 98
IV.MC2.EHZ. 2021-02-28T22:35:36.65 0.1 undecidable manual P 143 6.993 141 -0.19 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FDMO.HHN. ML:1.2 0.000203 0.24 AML other m 2021-02-28T22:35:39.15
IV.FDMO.HHE. ML:1.0 0.00014500000000000003 0.16 AML other m 2021-02-28T22:35:39.19
IV.NRCA.HHN. ML:1.1 0.0001305 0.2 AML other m 2021-02-28T22:35:40.85
IV.NRCA.HHE. ML:1.3 0.000193 1.9 AML other m 2021-02-28T22:35:40.02
IV.CESI.HHN. ML:0.8 0.000055849999999999996 0.22 AML other m 2021-02-28T22:35:42.62
IV.CESI.HHE. ML:0.6 0.000033805335 0.32 AML other m 2021-02-28T22:35:43.80
IV.NRCA.HNE. ML:1.3 0.000209069 0.128 AML other m 2021-02-28T22:35:41.08
IV.NRCA.HNN. ML:1.2 0.00017327575500000002 1.3696 AML other m 2021-02-28T22:35:41.16
IV.CSP1.EHE. ML:0.9 0.000069595515 0.3456 AML other m 2021-02-28T22:35:40.79
IV.CSP1.EHN. ML:1.0 0.000099470855 0.2944 AML other m 2021-02-28T22:35:42.62
IV.EL6.EHE. ML:1.2 0.000056309 1.7408 AML other m 2021-02-28T22:35:49.57
IV.EL6.EHN. ML:1.0 0.000030242812500000002 1.7024 AML other m 2021-02-28T22:35:49.09
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