Earthquake with magnitude of ML 0.2 on date 04-09-2021 and time 22:26:28 (UTC) in region 1 km E Castelsantangelo sul Nera (MC)

A magnitude ML 0.2 earthquake occured in region: 1 km E Castelsantangelo sul Nera (MC), on

  • 04-09-2021 22:26:28 (UTC)
  • 05-09-2021 00:26:28 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.898, 13.167 at 13 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
Castelsantangelo sul Nera MC 1 281 281
Ussita MC 6 444 725
Visso MC 7 1107 1832
Preci PG 11 724 2556
Bolognola MC 12 142 2698
Norcia PG 13 4957 7655
Montemonaco AP 13 604 8259
Acquacanina MC 15 121 8380
Montegallo AP 15 523 8903
Montefortino FM 15 1178 10081
Fiastra MC 16 559 10640
Fiordimonte MC 17 202 10842
Monte Cavallo MC 17 145 10987
Arquata del Tronto AP 17 1178 12165
Amandola FM 18 3629 15794
Pieve Torina MC 19 1458 17252
Sarnano MC 19 3264 20516
Sellano PG 20 1079 21595
Pievebovigliana MC 20 866 22461

Municipalities with at least 50000 inhabitants

An earthquake occurred to
38 Km E of Foligno (57155 inhabitants)
51 Km NW of Teramo (54892 inhabitants)
57 Km NE of Terni (111501 inhabitants)
64 Km NW of L'Aquila (69753 inhabitants)
67 Km E of Perugia (166134 inhabitants)
85 Km SW of Ancona (100861 inhabitants)
91 Km W of Montesilvano (53738 inhabitants)
98 Km W of Pescara (121014 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Preliminary map of the earthquake effects from the web questionnaire

Preliminary map of the earthquake effects from the web questionnaire

This map shows the distribution of the effects of the earthquake on the territory in terms of the MCS (Mercalli-Cancani-Sieberg) intensity scale. The intensities are determined using the data provided in the questionnaire (http://www.haisentitoilterremoto.it/) that are analysed using robust statistical techniques since they are not verified individually. Specifically, the assignment of MCS intensities greater or equal the VI degree of the MCS scale require opportune in situ verification by professional experts. The purple start shows the epicenter. This map is prepared every so often that the population fill in new questionnaires. The number of questionnaires used to determine the map and the date and time of the last adjournment are shown in the upper right part of the panel.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100
ML 0.2 2021-09-04
22:26:28
42.8977 13.1667 13 2021-09-04
22:37:09
Sala Sismica INGV-Roma 95047511
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-04 22:26:28 ± 0.19
Latitude 42.8977 ± 0.0072
Longitude 13.1667 ± 0.0110
Depth (km) 13 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 95047511

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 910
Semi-minor axis of confidence ellipse (meter) 475
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 286
Circular confidence region, given by single value of horizontal uncertainty (meter) 910
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 126
Number of associated phases, regardless of their use for origin computation 23
Number of defining phases 10
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
Epicentral distance of station farthest from the epicenter (degree) 0.19605
Number of stations at which the event was observed 16
Number of stations from which data was used for origin computation 5
Magnitude information

ML:0.2

Field Value
Value 0.2
Uncertainty 0.1
Num. used stations 2
Type of magnitude ML
Reference to an origin 95047511
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-04 22:37:09
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.MBAL.EHZ. 2021-09-04T22:28:10.86 3.0 undecidable manual Sg 17.42 0
IV.MIGL.HHZ. 2021-09-04T22:28:09.55 3.0 undecidable manual Sg 3.65 0
GU.RNCA.HHZ. 2021-09-04T22:27:54.50 3.0 undecidable manual Sn -0.31 0
IV.CRJA.HHZ. 2021-09-04T22:27:36.86 3.0 undecidable manual Pn -4.97 0
IV.NDIM.HHZ. 2021-09-04T22:27:34.02 3.0 undecidable manual Sn -1.94 0
OT.CGL1.HHZ. 2021-09-04T22:27:30.19 3.0 positive manual Pg 0.21 0
GU.GSCL.HHZ. 2021-09-04T22:27:29.80 3.0 undecidable manual Sn 0.23 0
IV.MBAL.EHZ. 2021-09-04T22:27:27.15 3.0 undecidable manual Pg 12.8 0
IV.ZCCA.HNZ. 2021-09-04T22:27:22.65 3.0 undecidable manual Sn -2.14 0
IV.PAOL.HHZ. 2021-09-04T22:27:19.25 3.0 undecidable manual Sn -9.99 0
IV.ZCCA.HNZ. 2021-09-04T22:27:04.60 3.0 undecidable manual Pg 6.35 0
IV.OSSC.HHZ. 2021-09-04T22:26:55.16 3.0 positive manual Pg 6.23 0
IV.CSP1.EHZ. 2021-09-04T22:26:36.36 0.6 undecidable manual S 8 0.1961 102 -0.33 46
IV.SRES.HHZ. 2021-09-04T22:26:36.82 3.0 undecidable manual P -2.28 0
IV.FDMO.HHZ. 2021-09-04T22:26:35.15 0.6 undecidable manual S 337 0.1502 111 -0.24 47
IV.MMO1.EHZ. 2021-09-04T22:26:34.15 0.6 undecidable manual S 89 0.1169 121 -0.36 46
IV.CSP1.EHZ. 2021-09-04T22:26:33.18 0.1 undecidable manual P 8 0.1961 102 0.01 98
IV.NRCA.HHE. 2021-09-04T22:26:33.29 0.1 undecidable manual S 211 0.0746 139 -0.24 94
IV.MMO1.EHZ. 2021-09-04T22:26:32.09 0.6 undecidable manual P 89 0.1169 121 0.18 48
IV.FDMO.HHZ. 2021-09-04T22:26:32.60 0.1 undecidable manual P 337 0.1502 111 0.18 95
IV.MC2.EHZ. 2021-09-04T22:26:32.81 0.6 undecidable manual S 50 0.0216 167 0.01 50
IV.NRCA.HHE. 2021-09-04T22:26:31.40 0.1 undecidable manual P 211 0.0746 139 0.05 100
IV.MC2.EHZ. 2021-09-04T22:26:31.28 0.1 undecidable manual P 50 0.0216 167 0.35 94
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FDMO.HHN. ML:0.3 1.615E-5 0.22 AML other m 2021-09-04T22:26:35.33
IV.FDMO.HHE. ML:0.1 1.1625E-5 0.28 AML other m 2021-09-04T22:26:35.35
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