Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.9 on date 30-03-2021 and time 03:15:58 (Italy) in region 4 km SW Bolognola (MC)

A magnitude ML 0.9 earthquake occured in region: 4 km SW Bolognola (MC), on

  • 30-03-2021 01:15:58 (UTC)
  • 30-03-2021 03:15:58 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.9680, 13.1880 at 8 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
Bolognola MC 4 142 142
Ussita MC 5 444 586
Acquacanina MC 7 121 707
Fiastra MC 8 559 1266
Castelsantangelo sul Nera MC 9 281 1547
Visso MC 9 1107 2654
Fiordimonte MC 11 202 2856
Sarnano MC 12 3264 6120
Montefortino FM 13 1178 7298
Pievebovigliana MC 14 866 8164
Montemonaco AP 14 604 8768
Amandola FM 14 3629 12397
Pieve Torina MC 14 1458 13855
Monte Cavallo MC 15 145 14000
Preci PG 16 724 14724
Gualdo MC 17 815 15539
Cessapalombo MC 17 512 16051
Muccia MC 17 915 16966
Montegallo AP 18 523 17489
Comunanza AP 19 3166 20655
San Ginesio MC 19 3498 24153
Caldarola MC 19 1823 25976
Camporotondo di Fiastrone MC 19 563 26539

Municipalities with at least 50000 inhabitants

An earthquake occurred to
39 Km E of Foligno (57155 inhabitants)
54 Km NW of Teramo (54892 inhabitants)
63 Km NE of Terni (111501 inhabitants)
67 Km E of Perugia (166134 inhabitants)
71 Km N of L'Aquila (69753 inhabitants)
77 Km SW of Ancona (100861 inhabitants)
93 Km NW of Montesilvano (53738 inhabitants)
98 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 0.9 2021-03-30
01:15:58		 42.9682 13.1882 8 2021-03-30
01:22:07		 Sala Sismica INGV-Roma 88603401
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-03-30 01:15:58 ± 0.1
Latitude 42.9682 ± 0.0045
Longitude 13.1882 ± 0.0049
Depth (km) 8 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 88603401

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 448
Semi-minor axis of confidence ellipse (meter) 149
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 10
Circular confidence region, given by single value of horizontal uncertainty (meter) 450.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 78
Number of associated phases, regardless of their use for origin computation 22
Number of defining phases 22
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) 0.05666
Epicentral distance of station farthest from the epicenter (degree) 0.39390
Number of stations at which the event was observed 11
Number of stations from which data was used for origin computation 11
Magnitude information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.2
Num. used stations 12
Type of magnitude ML
Reference to an origin 88603401
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-03-30 01:22:07
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ASSB.HHZ. 2021-03-30T01:16:12.99 0.6 undecidable manual S 281 43.7229 50 0.05 47
IV.MNTT.EHZ. 2021-03-30T01:16:10.99 0.3 undecidable manual S 72 34.6431 102 0.64 62
IV.MF5.EHZ. 2021-03-30T01:16:06.90 0.6 undecidable manual S 84 22.1556 109 0.73 40
IV.MML1.HNZ. 2021-03-30T01:16:06.83 0.6 undecidable manual S 313 23.8539 108 0.11 48
IV.ASSB.HHZ. 2021-03-30T01:16:06.47 0.6 positive manual P 281 43.7229 50 -0.17 46
IV.CESI.HHZ. 2021-03-30T01:16:06.92 0.6 undecidable manual S 280 23.3544 108 0.35 46
IV.NRCA.HHZ. 2021-03-30T01:16:04.44 0.6 undecidable manual S 202 16.0728 115 0.22 48
IV.GUMA.HHZ. 2021-03-30T01:16:04.15 0.6 undecidable manual S 49 15.873 116 0 50
IV.MNTT.EHZ. 2021-03-30T01:16:04.71 0.1 undecidable manual P 72 34.6431 102 -0.44 88
IV.CESI.HHZ. 2021-03-30T01:16:03.29 0.1 undecidable manual P 280 23.3544 108 0.33 92
IV.CSP1.EHZ. 2021-03-30T01:16:03.28 0.6 undecidable manual S 6 13.7751 119 -0.22 48
IV.MMO1.EHZ. 2021-03-30T01:16:03.23 0.6 undecidable manual S 124 13.5753 119 -0.22 48
IV.MF5.EHZ. 2021-03-30T01:16:02.81 0.1 undecidable manual P 84 22.1556 109 0.08 97
IV.MML1.HNZ. 2021-03-30T01:16:02.97 0.1 undecidable manual P 313 23.8539 108 -0.08 97
IV.FDMO.HHZ. 2021-03-30T01:16:02.72 0.6 undecidable manual S 313 11.1777 124 0 50
IV.MC2.EHZ. 2021-03-30T01:16:01.40 0.6 undecidable manual S 179 6.2937 140 -0.07 50
IV.NRCA.HHZ. 2021-03-30T01:16:01.52 0.1 undecidable manual P 202 16.0728 115 -0.09 98
IV.GUMA.HHZ. 2021-03-30T01:16:01.63 1.0 negative manual P 49 15.873 116 0.06 25
IV.CSP1.EHZ. 2021-03-30T01:16:00.90 0.1 positive manual P 6 13.7751 119 -0.29 94
IV.MMO1.EHZ. 2021-03-30T01:16:00.90 0.3 negative manual P 124 13.5753 119 -0.26 71
IV.FDMO.HHZ. 2021-03-30T01:16:00.56 1.0 undecidable manual P 313 11.1777 124 -0.18 24
IV.MC2.EHZ. 2021-03-30T01:15:59.96 0.1 positive manual P 179 6.2937 140 -0.06 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FDMO.HHN. ML:0.9 0.0001032 1.6 AML other m 2021-03-30T01:16:02.03
IV.FDMO.HHE. ML:0.7 0.00006905 1.8 AML other m 2021-03-30T01:16:02.92
IV.CSP1.EHN. ML:1.1 0.00014450000000000002 0.86 AML other m 2021-03-30T01:16:03.06
IV.CSP1.EHE. ML:1.0 0.000123 1.18 AML other m 2021-03-30T01:16:05.71
IV.GUMA.HHN. ML:1.1 0.00012025 0.98 AML other m 2021-03-30T01:16:05.19
IV.NRCA.HHE. ML:1.1 0.000125 0.44 AML other m 2021-03-30T01:16:05.33
IV.GUMA.HHE. ML:1.1 0.00013285 0.78 AML other m 2021-03-30T01:16:05.75
IV.NRCA.HHN. ML:1.0 0.0001066 0.34 AML other m 2021-03-30T01:16:06.46
IV.CESI.HHN. ML:0.8 0.000038650000000000004 0.7 AML other m 2021-03-30T01:16:07.90
IV.CESI.HHE. ML:0.8 0.000043249999999999994 0.96 AML other m 2021-03-30T01:16:09.47
IV.ASSB.HHN. ML:0.8 0.00001825 0.44 AML other m 2021-03-30T01:16:14.10
IV.ASSB.HHE. ML:0.7 0.000017265 1.14 AML other m 2021-03-30T01:16:17.58
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