Earthquake with magnitude of ML 1.5 on date 21-09-2021 and time 06:15:51 (Italy) in region 4 km SE Castelsantangelo sul Nera (MC)

A magnitude ML 1.5 earthquake occured in region: 4 km SE Castelsantangelo sul Nera (MC), on

  • 21-09-2021 04:15:51 (UTC)
  • 21-09-2021 06:15:51 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.875, 13.191 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.

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 4 281 281
Ussita MC 9 444 725
Visso MC 10 1107 1832
Montemonaco AP 12 604 2436
Norcia PG 12 4957 7393
Montegallo AP 12 523 7916
Preci PG 12 724 8640
Bolognola MC 14 142 8782
Arquata del Tronto AP 14 1178 9960
Montefortino FM 14 1178 11138
Acquacanina MC 17 121 11259
Amandola FM 18 3629 14888
Fiastra MC 18 559 15447
Fiordimonte MC 20 202 15649
Sarnano MC 20 3264 18913

Municipalities with at least 50000 inhabitants

An earthquake occurred to
41 Km E of Foligno (57155 inhabitants)
48 Km NW of Teramo (54892 inhabitants)
57 Km NE of Terni (111501 inhabitants)
61 Km N of L'Aquila (69753 inhabitants)
70 Km E of Perugia (166134 inhabitants)
87 Km SW of Ancona (100861 inhabitants)
88 Km W of Montesilvano (53738 inhabitants)
95 Km W of Pescara (121014 inhabitants)
99 Km NW of Chieti (51815 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 1.5 2021-09-21
04:15:51
42.8753 13.1913 8 2021-09-21
04:45:24
Sala Sismica INGV-Roma 95683681
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-21 04:15:51 ± 0.07
Latitude 42.8753 ± 0.0027
Longitude 13.1913 ± 0.0061
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 95683681

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 442
Semi-minor axis of confidence ellipse (meter) 102
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 273
Circular confidence region, given by single value of horizontal uncertainty (meter) 440
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 54
Number of associated phases, regardless of their use for origin computation 56
Number of defining phases 36
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.27
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.50002
Number of stations at which the event was observed 40
Number of stations from which data was used for origin computation 20
Magnitude information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.3
Num. used stations 22
Type of magnitude ML
Reference to an origin 95683681
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-21 04:45:24
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.ESML.HHZ. 2021-09-21T04:17:28.67 3.0 positive manual Pg 24.85 0
IV.CAR1.HHZ. 2021-09-21T04:17:16.13 3.0 undecidable manual Pg 24.58 0
IV.PTCC.HHZ. 2021-09-21T04:17:03.26 3.0 undecidable manual Sn -1.48 0
IV.SPS2.HHZ. 2021-09-21T04:16:58.47 3.0 negative manual Pn 6.46 0
IV.ERC.EHZ. 2021-09-21T04:16:54.87 3.0 undecidable manual Pn 2.84 0
IV.VOBA.EHZ. 2021-09-21T04:16:44.05 3.0 undecidable manual Sn -1.58 0
IV.BOZZ.EHZ. 2021-09-21T04:16:36.13 3.0 undecidable manual Sg 2 0
IT.PLTA.HNZ. 2021-09-21T04:16:32.74 3.0 undecidable manual Pg 16.59 0
IV.RNI2.HHZ. 2021-09-21T04:16:27.42 3.0 positive manual Pg 14.87 0
IV.ZEN8.EHZ. 2021-09-21T04:16:18.80 3.0 positive manual Pg 4.61 0
IV.CING.HHZ. 2021-09-21T04:16:10.08 0.6 undecidable manual S 0 0.5 50 0.54 42
IV.MOMA.HHZ. 2021-09-21T04:16:09.22 0.6 undecidable manual S 261 0.4605 50 0.84 38
IV.EL6.EHZ. 2021-09-21T04:16:08.79 0.6 undecidable manual S 352 0.4587 50 0.48 44
IV.MTL1.HNZ. 2021-09-21T04:16:08.77 3.0 undecidable manual Sn 0.67 0
IV.SNTG.HHZ. 2021-09-21T04:16:07.32 0.6 undecidable manual S 334 0.4209 50 0.11 47
IV.SBPO.HNZ. 2021-09-21T04:16:07.61 3.0 positive manual Pg 1.4 0
IV.RM33.EHZ. 2021-09-21T04:16:05.63 0.6 undecidable manual S 177 0.3669 50 0.04 49
IV.ARVD.HHZ. 2021-09-21T04:16:04.34 3.0 undecidable manual Sn -3.32 0
IV.LNSS.HHZ. 2021-09-21T04:16:03.63 0.6 undecidable manual S 202 0.2941 103 0.49 45
IV.GAVE.EHZ. 2021-09-21T04:16:03.26 0.6 undecidable manual S 230 0.2842 104 0.47 45
IV.SMA1.EHZ. 2021-09-21T04:16:02.20 0.6 undecidable manual S 157 0.2662 104 0.08 49
IV.MML1.EHZ. 2021-09-21T04:16:02.70 0.6 undecidable manual S 326 0.2869 103 -0.18 48
IV.MOMA.HHZ. 2021-09-21T04:16:01.05 1.0 undecidable manual P 261 0.4605 50 -0.2 23
IV.MF5.EHZ. 2021-09-21T04:16:01.59 0.6 undecidable manual S 60 0.2266 107 0.97 37
IV.FIU.EHZ. 2021-09-21T04:16:01.09 3.0 positive manual Pg 1.35 0
IV.CESI.HHZ. 2021-09-21T04:16:01.53 0.6 undecidable manual S 302 0.2464 106 0.16 49
IV.CING.HHZ. 2021-09-21T04:16:01.46 1.0 positive manual P 0 0.5 50 -0.46 22
IV.GUMA.HHZ. 2021-09-21T04:16:00.54 0.6 undecidable manual S 29 0.2149 108 0.34 47
IV.SNTG.HHZ. 2021-09-21T04:16:00.09 0.1 undecidable manual P 334 0.4209 50 -0.49 88
IV.CSP1.EHZ. 2021-09-21T04:16:00.40 0.6 undecidable manual S 3 0.2167 108 0.14 49
IV.EL6.EHZ. 2021-09-21T04:16:00.77 1.0 negative manual P 352 0.4587 50 -0.44 22
IV.ASSB.HHZ. 2021-09-21T04:16:00.18 0.6 negative manual P 293 0.4236 50 -0.44 44
IV.MNTT.EHZ. 2021-09-21T04:15:59.86 0.3 negative manual P 58 0.3498 50 0.51 66
IV.RM33.EHZ. 2021-09-21T04:15:59.36 1.0 positive manual P 177 0.3669 50 -0.28 23
IV.TERO.HHZ. 2021-09-21T04:15:59.56 0.1 negative manual P 130 0.3939 50 -0.55 86
IV.APEC.HHZ. 2021-09-21T04:15:59.11 3.0 undecidable manual S -2.43 0
IV.FDMO.HHZ. 2021-09-21T04:15:58.92 0.6 undecidable manual S 335 0.1781 111 0.05 50
IV.LNSS.HHZ. 2021-09-21T04:15:58.23 0.3 positive manual P 202 0.2941 103 0 75
IV.MML1.EHZ. 2021-09-21T04:15:57.66 0.1 undecidable manual P 326 0.2869 103 -0.41 91
IV.CSNT.HHZ. 2021-09-21T04:15:57.34 3.0 undecidable manual S -1.93 0
IV.GAVE.EHZ. 2021-09-21T04:15:57.91 0.6 undecidable manual P 230 0.2842 104 -0.11 49
IV.SMA1.EHZ. 2021-09-21T04:15:57.39 0.1 negative manual P 157 0.2662 104 -0.24 95
IV.CESI.HHZ. 2021-09-21T04:15:57.10 0.3 negative manual P 302 0.2464 106 -0.1 74
IV.CSP1.EHZ. 2021-09-21T04:15:56.32 0.6 positive manual P 3 0.2167 108 -0.24 48
IV.MMO1.EHZ. 2021-09-21T04:15:56.02 0.6 undecidable manual S 76 0.1016 124 -0.23 49
IV.GUMA.HHZ. 2021-09-21T04:15:56.61 0.1 positive manual P 29 0.2149 108 0.09 99
IV.MF5.EHZ. 2021-09-21T04:15:56.98 0.6 positive manual P 60 0.2266 107 0.21 48
IV.NRCA.HNZ. 2021-09-21T04:15:55.43 0.6 undecidable manual S 233 0.0701 134 0.13 51
IV.FDMO.HHZ. 2021-09-21T04:15:55.62 0.3 undecidable manual P 335 0.1781 111 -0.14 74
IV.MMO1.EHZ. 2021-09-21T04:15:54.13 1.0 undecidable manual P 76 0.1016 124 -0.12 25
IV.NRCA.HNZ. 2021-09-21T04:15:53.93 0.1 positive manual P 233 0.0701 134 0.23 99
IV.MC2.EHZ. 2021-09-21T04:15:53.02 0.1 undecidable manual P 357 0.036 152 -0.22 100
IV.SACS.HNZ. 2021-09-21T04:15:52.76 3.0 undecidable manual Pg 3.59 0
IV.RIBO.EHZ.01 2021-09-21T04:15:50.83 3.0 undecidable manual P 0.04 0
IV.TRIF.CHZ. 2021-09-21T04:15:50.22 3.0 positive manual P -0.9 0
IV.ASQU.HHZ. 2021-09-21T04:15:46.15 3.0 undecidable manual P -3.8 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HNE. ML:2.2 0.00277 0.38 AML other m 2021-09-21T04:15:55.61
IV.NRCA.HHE. ML:2.2 0.00294 0.38 AML other m 2021-09-21T04:15:55.61
IV.NRCA.HNN. ML:2.2 0.002525 0.12 AML other m 2021-09-21T04:15:55.84
IV.NRCA.HHN. ML:2.2 0.0029 0.12 AML other m 2021-09-21T04:15:55.84
IV.FDMO.HHE. ML:1.2 0.000127 0.62 AML other m 2021-09-21T04:16:00.17
IV.GUMA.HHE. ML:1.7 0.000296 0.22 AML other m 2021-09-21T04:16:00.79
IV.FDMO.HHN. ML:1.3 0.000146 1.02 AML other m 2021-09-21T04:16:01.32
IV.CESI.HHE. ML:1.3 0.0001055 0.46 AML other m 2021-09-21T04:16:02.85
IV.CSP1.EHN. ML:1.7 0.000315 0.86 AML other m 2021-09-21T04:16:02.34
IV.CESI.HHN. ML:1.5 0.000192 1.3 AML other m 2021-09-21T04:16:03.09
IV.MML1.EHE. ML:1.2 7.81E-5 1.2 AML other m 2021-09-21T04:16:03.17
IV.CSP1.EHE. ML:1.6 0.0002335 0.3 AML other m 2021-09-21T04:16:03.78
IV.LNSS.HHE. ML:1.6 0.0001965 0.32 AML other m 2021-09-21T04:16:03.76
IV.LNSS.HHN. ML:1.6 0.0001675 0.18 AML other m 2021-09-21T04:16:03.85
IV.GUMA.HHN. ML:1.7 0.00031 0.4 AML other m 2021-09-21T04:16:04.48
IV.GAVE.EHE. ML:1.6 0.000171 0.18 AML other m 2021-09-21T04:16:04.93
IV.GAVE.EHN. ML:1.4 0.0001216 0.14 AML other m 2021-09-21T04:16:05.44
IV.MML1.EHN. ML:1.3 9.175E-5 1 AML other m 2021-09-21T04:16:05.48
IV.SMA1.EHE. ML:1.3 9.66E-5 0.48 AML other m 2021-09-21T04:16:07.64
IV.SMA1.EHN. ML:1.3 9.9E-5 0.72 AML other m 2021-09-21T04:16:08.67
IV.TERO.HHN. ML:1.3 6.025E-5 0.46 AML other m 2021-09-21T04:16:08.56
IV.SBPO.HNE. ML:4.1 0.001465 0.06 AML other m 2021-09-21T04:16:09.92
IV.TERO.HHE. ML:1.8 0.0002105 1.1 AML other m 2021-09-21T04:16:30.69
IV.SBPO.HNN. ML:3.6 0.00052305 0.4 AML other m 2021-09-21T04:16:39.64
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