Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.8 on date 30-03-2021 and time 20:36:53 (Italy) in region 2 km NE Castelsantangelo sul Nera (MC)

A magnitude ML 0.8 earthquake occured in region: 2 km NE Castelsantangelo sul Nera (MC), on

  • 30-03-2021 18:36:53 (UTC)
  • 30-03-2021 20:36:53 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.9150, 13.1700 at 16 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.

Hai sentito il terremoto? Clicca qui

Did you feel it? Fill in the questionnaire.

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 3 281 281
Ussita MC 4 444 725
Visso MC 7 1107 1832
Bolognola MC 10 142 1974
Preci PG 11 724 2698
Acquacanina MC 13 121 2819
Montemonaco AP 13 604 3423
Fiastra MC 14 559 3982
Montefortino FM 14 1178 5160
Norcia PG 15 4957 10117
Fiordimonte MC 15 202 10319
Montegallo AP 16 523 10842
Monte Cavallo MC 16 145 10987
Amandola FM 17 3629 14616
Sarnano MC 17 3264 17880
Pieve Torina MC 17 1458 19338
Pievebovigliana MC 18 866 20204
Arquata del Tronto AP 19 1178 21382
Sellano PG 20 1079 22461

Municipalities with at least 50000 inhabitants

An earthquake occurred to
38 Km E of Foligno (57155 inhabitants)
52 Km NW of Teramo (54892 inhabitants)
58 Km NE of Terni (111501 inhabitants)
65 Km N of L'Aquila (69753 inhabitants)
67 Km E of Perugia (166134 inhabitants)
83 Km SW of Ancona (100861 inhabitants)
92 Km W of Montesilvano (53738 inhabitants)
99 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 0.8 2021-03-30
18:36:53		 42.9147 13.1698 16 2021-03-30
18:44:56		 Sala Sismica INGV-Roma 88623181
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-03-30 18:36:53 ± 0.12
Latitude 42.9147 ± 0.0036
Longitude 13.1698 ± 0.0049
Depth (km) 16 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 88623181

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 409
Semi-minor axis of confidence ellipse (meter) 178
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 57
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) 117
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) 0.13
Epicentral distance of station closest to the epicenter (degree) 0.01439
Epicentral distance of station farthest from the epicenter (degree) 0.24551
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:0.8

Field Value
Value 0.8
Uncertainty 0.3
Num. used stations 4
Type of magnitude ML
Reference to an origin 88623181
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-03-30 18:44:56
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MML1.HNZ. 2021-03-30T18:37:03.23 0.3 undecidable manual S 324 27.2505 106 0.12 71
IV.PF6.EHZ. 2021-03-30T18:37:02.40 0.3 undecidable manual S 5 24.8529 109 -0.09 71
IV.CSP1.EHZ. 2021-03-30T18:37:01.15 0.3 undecidable manual S 8 19.869 116 -0.1 72
IV.MMO1.EHZ. 2021-03-30T18:36:59.61 0.3 undecidable manual S 97 12.876 131 -0.08 73
IV.FDMO.HHZ. 2021-03-30T18:36:59.95 0.3 undecidable manual S 334 15.0738 125 -0.2 71
IV.PF6.EHZ. 2021-03-30T18:36:58.48 0.1 undecidable manual P 5 24.8529 109 -0.08 96
IV.MML1.HNZ. 2021-03-30T18:36:58.99 0.1 undecidable manual P 324 27.2505 106 0.07 96
IV.MC2.EHZ. 2021-03-30T18:36:58.37 0.3 undecidable manual S 103 1.5984 173 0.13 75
IV.NRCA.HHZ. 2021-03-30T18:36:58.94 0.3 undecidable manual S 207 10.0788 140 -0.22 72
IV.CSP1.EHZ. 2021-03-30T18:36:57.89 0.1 undecidable manual P 8 19.869 116 0.04 98
IV.FDMO.HHZ. 2021-03-30T18:36:57.31 0.1 undecidable manual P 334 15.0738 125 0.1 97
IV.MC2.EHZ. 2021-03-30T18:36:56.28 0.1 undecidable manual P 103 1.5984 173 0.17 98
IV.NRCA.HHZ. 2021-03-30T18:36:56.64 0.1 undecidable manual P 207 10.0788 140 0 100
IV.MMO1.EHZ. 2021-03-30T18:36:56.99 0.1 undecidable manual P 97 12.876 131 0.05 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHN. ML:1.2 0.000164 1.86 AML other m 2021-03-30T18:36:58.03
IV.NRCA.HHE. ML:1.0 0.00008730000000000001 1.38 AML other m 2021-03-30T18:36:59.97
IV.FDMO.HHE. ML:0.6 0.0000294 1.76 AML other m 2021-03-30T18:36:59.93
IV.FDMO.HHN. ML:0.6 0.0000311 0.18 AML other m 2021-03-30T18:37:00.18
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