Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.8 on date 02-04-2021 and time 22:21:19 (UTC) in region 7 km SW Serravalle di Chienti (MC)

A magnitude ML 0.8 earthquake occured in region: 7 km SW Serravalle di Chienti (MC), on

  • 02-04-2021 22:21:19 (UTC)
  • 03-04-2021 00:21:19 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.0330, 12.8850 at 6 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
Serravalle di Chienti MC 7 1070 1070
Monte Cavallo MC 11 145 1215
Valtopina PG 11 1398 2613
Nocera Umbra PG 12 5839 8452
Pieve Torina MC 14 1458 9910
Sefro MC 14 422 10332
Muccia MC 14 915 11247
Sellano PG 16 1079 12326
Pievebovigliana MC 17 866 13192
Fiordimonte MC 17 202 13394
Foligno PG 17 57155 70549
Spello PG 18 8645 79194
Fiuminata MC 18 1402 80596
Pioraco MC 18 1134 81730
Camerino MC 19 6974 88704

Municipalities with at least 50000 inhabitants

An earthquake occurred to
17 Km NE of Foligno (57155 inhabitants)
41 Km E of Perugia (166134 inhabitants)
56 Km NE of Terni (111501 inhabitants)
79 Km NW of Teramo (54892 inhabitants)
83 Km SW of Ancona (100861 inhabitants)
87 Km NW of L'Aquila (69753 inhabitants)
91 Km S of Fano (60888 inhabitants)
93 Km NE of Viterbo (67173 inhabitants)
94 Km SE of Arezzo (99543 inhabitants)
98 Km S of Pesaro (94582 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 0.8 2021-04-02
22:21:19		 43.0333 12.8848 7 2021-04-02
22:29:04		 Sala Sismica INGV-Roma 88720511
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-04-02 22:21:19 ± 0.13
Latitude 43.0333 ± 0.0045
Longitude 12.8848 ± 0.0037
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 88720511

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 409
Semi-minor axis of confidence ellipse (meter) 243
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 16
Circular confidence region, given by single value of horizontal uncertainty (meter) 410.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 120
Number of associated phases, regardless of their use for origin computation 15
Number of defining phases 12
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.14
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.23472
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 6
Magnitude information

ML:0.8

Field Value
Value 0.8
Uncertainty 0.1
Num. used stations 4
Type of magnitude ML
Reference to an origin 88720511
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-04-02 22:29:04
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CPGN.EHZ. 2021-04-02T22:21:49.28 3.0 undecidable manual S -0.92 0
IV.ATCC.EHZ. 2021-04-02T22:21:28.90 0.3 undecidable manual S 310 26.0517 104 0.08 71
IV.EL6.EHZ. 2021-04-02T22:21:28.08 3.0 undecidable manual P 1.31 0
IV.ATFO.HHZ. 2021-04-02T22:21:26.94 3.0 negative manual P -1.13 0
IV.ASSB.HHZ. 2021-04-02T22:21:26.40 0.3 undecidable manual S 273 18.3705 109 0.13 72
IV.FDMO.HHZ. 2021-04-02T22:21:25.79 0.6 undecidable manual S 89 16.4724 112 0.15 48
IV.MML1.EHZ. 2021-04-02T22:21:24.05 0.3 undecidable manual S 38 11.3775 120 0 74
IV.ATCC.EHZ. 2021-04-02T22:21:24.71 0.1 undecidable manual P 310 26.0517 104 -0.17 93
IV.FDMO.HHZ. 2021-04-02T22:21:23.11 0.1 undecidable manual P 89 16.4724 112 0.06 97
IV.ASSB.HHZ. 2021-04-02T22:21:23.45 0.1 negative manual P 273 18.3705 109 0.04 97
IT.MTCL.HGE. 2021-04-02T22:21:23.89 0.3 undecidable manual S 115 10.2786 122 0.16 72
IV.MML1.EHZ. 2021-04-02T22:21:22.09 0.1 undecidable manual P 38 11.3775 120 -0.04 98
IV.CESI.HHZ. 2021-04-02T22:21:21.02 0.1 undecidable manual P 153 3.5964 151 0.03 100
IT.MTCL.HGE. 2021-04-02T22:21:21.57 0.6 undecidable manual P 115 10.2786 122 -0.38 46
IV.CESI.HHZ. 2021-04-02T22:21:21.88 0.6 undecidable manual S 153 3.5964 151 -0.19 48
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FDMO.HHE. ML:0.7 0.00005215 0.14 AML other m 2021-04-02T22:21:25.98
IV.FDMO.HHN. ML:0.9 0.0000856 0.16 AML other m 2021-04-02T22:21:25.97
IV.ASSB.HHN. ML:0.7 0.00004212312 0.1152 AML other m 2021-04-02T22:21:26.57
IV.ASSB.HHE. ML:0.8 0.000048641254999999995 0.0896 AML other m 2021-04-02T22:21:27.17
IV.CESI.HHE. ML:0.0 0.00044748805 0.0768 AML other m 2021-04-02T22:21:22.11
IV.CESI.HHN. ML:0.0 0.00020998624999999998 0.0768 AML other m 2021-04-02T22:21:22.14
IV.CESI.HNE. ML:0.0 0.00039752805000000004 0.0768 AML other m 2021-04-02T22:21:22.07
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