Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.1 on date 04-08-2020 and time 08:15:29 (Italy) in region 2 km SW Ussita (MC)

A magnitude ML 2.1 earthquake occured in region: 2 km SW Ussita (MC), on

  • 04-08-2020 06:15:29 (UTC)
  • 04-08-2020 08:15:29 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.9270, 13.1290 at 11 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

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
Ussita MC 2 444 444
Visso MC 3 1107 1551
Castelsantangelo sul Nera MC 4 281 1832
Preci PG 9 724 2556
Bolognola MC 11 142 2698
Acquacanina MC 12 121 2819
Fiastra MC 12 559 3378
Fiordimonte MC 13 202 3580
Monte Cavallo MC 13 145 3725
Pieve Torina MC 15 1458 5183
Norcia PG 15 4957 10140
Pievebovigliana MC 16 866 11006
Montemonaco AP 16 604 11610
Sellano PG 17 1079 12689
Montefortino FM 17 1178 13867
Sarnano MC 19 3264 17131
Muccia MC 19 915 18046
Montegallo AP 19 523 18569
Amandola FM 20 3629 22198

Municipalities with at least 50000 inhabitants

An earthquake occurred to
35 Km E of Foligno (57155 inhabitants)
56 Km NW of Teramo (54892 inhabitants)
57 Km NE of Terni (111501 inhabitants)
63 Km E of Perugia (166134 inhabitants)
68 Km NW of L'Aquila (69753 inhabitants)
83 Km SW of Ancona (100861 inhabitants)
95 Km W of Montesilvano (53738 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
Bulletin
Rev1000 		ML 2.1 2020-08-04
06:15:29		 42.9268 13.1292 11 2020-11-19
12:36:56		 Bollettino Sismico Italiano INGV 81675771
Reviewed
Rev100 		ML 2.1 2020-08-04
06:15:29		 42.9258 13.1297 11 2020-08-04
06:25:48		 Sala Sismica INGV-Roma 81628111
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-08-04 06:15:29 ± 0.04
Latitude 42.9268 ± 0.0027
Longitude 13.1292 ± 0.0037
Depth (km) 11 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 81675771

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 308
Semi-minor axis of confidence ellipse (meter) 225
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 56
Circular confidence region, given by single value of horizontal uncertainty (meter) 310.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 60
Number of associated phases, regardless of their use for origin computation 55
Number of defining phases 52
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) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.75183
Number of stations at which the event was observed 36
Number of stations from which data was used for origin computation 33
Magnitudes information

ML:2.1

Field Value
Value 2.1
Uncertainty 0.3
Num. used stations 50
Type of magnitude ML
Reference to an origin 81628111
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-08-04 06:25:48

ML:2.1

Field Value
Value 2.1
Uncertainty 0.3
Num. used stations 54
Type of magnitude ML
Reference to an origin 81675771
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-08-05 14:01:49
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.T1299.HNN. 2020-08-04T06:16:29.03 0.1 undecidable manual P 34.743 5.234 0
IV.FIR.HHZ. 2020-08-04T06:16:23.46 3.0 undecidable manual Sg 5.33 0
IV.GATE.HNZ. 2020-08-04T06:16:05.00 3.0 undecidable manual Pg 3.7 0
IT.FIE.HGZ. 2020-08-04T06:15:58.90 3.0 undecidable manual Pn 2.2 0
IV.ATCC.EHZ. 2020-08-04T06:15:46.12 0.3 undecidable manual S 306 48.9177 50 0.65 60
IV.ARRO.EHZ. 2020-08-04T06:15:45.04 0.6 undecidable manual S 218 48.618 50 -0.34 44
IV.MPAG.EHZ. 2020-08-04T06:15:44.60 0.3 undecidable manual P 339 83.4498 50 0.4 61
IV.PIEI.HHZ. 2020-08-04T06:15:44.20 0.3 undecidable manual P 325 82.8504 50 0.09 65
IV.EL6.EHZ. 2020-08-04T06:15:44.60 0.1 undecidable manual S 357 44.7219 50 0.26 90
IV.SNTG.HHZ. 2020-08-04T06:15:43.07 0.1 undecidable manual S 337 39.5271 50 0.12 93
IV.ASSB.HHZ. 2020-08-04T06:15:43.28 0.3 undecidable manual S 289 40.2264 50 0.12 70
IV.LNSS.HHZ. 2020-08-04T06:15:42.89 0.3 undecidable manual S 191 36.6411 50 0.7 60
IV.SMA1.EHZ. 2020-08-04T06:15:42.33 0.3 undecidable manual S 153 36.9297 50 0.07 71
IV.GAVE.EHZ. 2020-08-04T06:15:41.02 0.1 undecidable manual S 216 32.2455 50 0 97
IV.ARVD.HHZ. 2020-08-04T06:15:41.44 0.3 undecidable manual P 347 65.1903 50 0.06 68
IV.MF5.EHZ. 2020-08-04T06:15:40.13 0.3 undecidable manual S 76 27.6501 50 0.34 68
IV.SSFR.HHZ. 2020-08-04T06:15:40.91 0.3 undecidable manual P 334 63.0924 50 -0.15 67
IV.SAP2.EHZ. 2020-08-04T06:15:40.61 0.1 undecidable manual S 49 28.8489 50 0.49 88
IV.MURB.HHZ. 2020-08-04T06:15:40.89 0.3 undecidable manual P 308 61.5939 50 0.07 68
IV.MTRA.EHZ. 2020-08-04T06:15:39.77 0.1 undecidable manual S 131 28.749 50 -0.32 91
IV.MML1.HNE. 2020-08-04T06:15:38.53 0.1 undecidable manual S 328 24.3534 50 -0.37 91
IV.RM33.HNZ. 2020-08-04T06:15:38.43 0.3 undecidable manual P 171 46.8198 50 -0.13 69
IV.ATCC.EHZ. 2020-08-04T06:15:38.74 0.1 undecidable manual P 306 48.9177 50 -0.14 92
IV.MNTT.EHZ. 2020-08-04T06:15:38.12 0.1 undecidable manual P 68 40.7259 50 0.51 86
IV.ARRO.EHZ. 2020-08-04T06:15:38.96 0.3 undecidable manual P 218 48.618 50 0.13 69
IV.CAMP.HHZ. 2020-08-04T06:15:38.48 0.3 undecidable manual P 152 49.0176 50 -0.41 65
IV.FOSV.EHZ. 2020-08-04T06:15:38.96 0.1 undecidable manual P 324 50.5161 50 -0.17 91
IV.ASSB.HHZ. 2020-08-04T06:15:37.33 0.1 positive manual P 289 40.2264 50 -0.21 92
IV.EL6.EHZ. 2020-08-04T06:15:37.95 0.1 undecidable manual P 357 44.7219 50 -0.28 90
IV.CSP1.EHZ. 2020-08-04T06:15:37.14 0.1 undecidable manual S 19 19.2696 119 -0.4 91
IV.CESI.HNZ. 2020-08-04T06:15:37.81 0.1 undecidable manual S 296 20.1687 50 0.02 99
IV.SNTG.HHZ. 2020-08-04T06:15:37.17 0.1 undecidable manual P 337 39.5271 50 -0.25 91
IV.GAVE.EHZ. 2020-08-04T06:15:36.26 0.3 undecidable manual P 216 32.2455 50 -0.05 72
IT.FOPC.HGN. 2020-08-04T06:15:36.71 0.1 undecidable manual P 278 34.9428 50 -0.01 96
IV.MMO1.EHZ. 2020-08-04T06:15:36.33 0.1 undecidable manual S 101 16.3725 123 -0.33 93
IV.SMA1.EHZ. 2020-08-04T06:15:36.85 0.3 undecidable manual P 153 36.9297 50 -0.17 70
IV.LNSS.HHZ. 2020-08-04T06:15:36.89 0.3 undecidable manual P 191 36.6411 50 -0.09 71
IV.FIU1.HNZ. 2020-08-04T06:15:36.44 0.3 undecidable manual P 331 33.1446 50 -0.01 73
IV.MTRA.EHZ. 2020-08-04T06:15:35.44 0.1 undecidable manual P 131 28.749 50 -0.33 91
IV.SEF1.HNN. 2020-08-04T06:15:35.57 0.3 undecidable manual P 329 28.5492 50 -0.16 71
IV.MF5.EHZ. 2020-08-04T06:15:35.75 0.1 positive manual P 76 27.6501 50 0.15 95
IV.NRCA.HNZ. 2020-08-04T06:15:35.03 0.1 undecidable manual S 187 10.3785 136 -0.04 100
IV.SAP2.EHZ. 2020-08-04T06:15:35.91 0.1 undecidable manual P 49 28.8489 50 0.12 95
IT.MTCL.HGZ. 2020-08-04T06:15:35.60 0.1 undecidable manual S 305 12.876 130 -0.1 98
IV.CESI.HNZ. 2020-08-04T06:15:34.44 0.1 positive manual P 296 20.1687 50 -0.01 99
IV.MC2.EHZ. 2020-08-04T06:15:34.35 0.1 undecidable manual S 109 5.1948 154 0.34 95
IV.MML1.HNE. 2020-08-04T06:15:34.93 0.1 undecidable manual P 328 24.3534 50 -0.16 95
IV.FEMA.HNZ. 2020-08-04T06:15:34.60 0.1 undecidable manual S 301 7.5813 145 0.17 98
IV.PF6.EHN. 2020-08-04T06:15:34.72 0.1 undecidable manual P 13 23.9538 50 -0.31 92
IV.CSP1.EHZ. 2020-08-04T06:15:34.14 0.1 negative manual P 19 19.2696 119 -0.16 96
IV.NRCA.HNZ. 2020-08-04T06:15:33.02 0.1 undecidable manual P 187 10.3785 136 0.15 98
IT.MTCL.HGZ. 2020-08-04T06:15:33.27 0.1 undecidable manual P 305 12.876 130 0.03 100
IV.MMO1.EHZ. 2020-08-04T06:15:33.69 0.1 positive manual P 101 16.3725 123 -0.11 98
IV.MC2.EHZ. 2020-08-04T06:15:32.60 0.1 negative manual P 109 5.1948 154 0.34 95
IV.FEMA.HNZ. 2020-08-04T06:15:32.78 0.1 undecidable manual P 301 7.5813 145 0.27 96
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FEMA.HNN. ML:2.4 0.0035700000000000003 0.22 AML other m 2020-08-04T06:15:34.84
IV.FEMA.HNE. ML:2.6 0.006075 0.28 AML other m 2020-08-04T06:15:34.99
IV.NRCA.HNE. ML:2.1 0.0016749999999999998 0.12 AML other m 2020-08-04T06:15:35.31
IV.NRCA.HHE. ML:2.2 0.0018199999999999998 0.12 AML other m 2020-08-04T06:15:35.31
IV.NRCA.HNN. ML:2.2 0.00187 1.34 AML other m 2020-08-04T06:15:35.91
IV.NRCA.HHN. ML:2.2 0.002045 1.32 AML other m 2020-08-04T06:15:35.91
IV.CSP1.EHE. ML:2.3 0.0016400000000000002 0.2 AML other m 2020-08-04T06:15:37.40
IV.CSP1.EHN. ML:2.0 0.000829 0.34 AML other m 2020-08-04T06:15:37.40
IV.CESI.HHE. ML:2.4 0.00204 1.32 AML other m 2020-08-04T06:15:37.16
IV.CESI.HNE. ML:2.4 0.0017349999999999998 1.32 AML other m 2020-08-04T06:15:37.17
IV.CESI.HHN. ML:2.7 0.003875 0.24 AML other m 2020-08-04T06:15:38.16
IV.CESI.HNN. ML:2.7 0.0037700000000000003 0.24 AML other m 2020-08-04T06:15:38.17
IV.MTRA.EHE. ML:2.0 0.0005015000000000001 0.2 AML other m 2020-08-04T06:15:40.36
IV.MTRA.HNE. ML:2.0 0.00048699999999999997 0.18 AML other m 2020-08-04T06:15:40.36
IV.MTRA.EHN. ML:2.2 0.0007335 0.34 AML other m 2020-08-04T06:15:40.78
IV.MTRA.HNN. ML:2.2 0.0007505 0.32 AML other m 2020-08-04T06:15:40.77
IV.MF5.EHE. ML:2.2 0.000782 1.74 AML other m 2020-08-04T06:15:41.03
IV.SAP2.EHN. ML:3.0 0.00535 0.18 AML other m 2020-08-04T06:15:41.00
IV.SAP2.EHE. ML:2.3 0.0009255 0.22 AML other m 2020-08-04T06:15:41.36
IV.MF5.EHN. ML:2.0 0.000501 0.62 AML other m 2020-08-04T06:15:42.06
IV.GAVE.EHE. ML:2.2 0.0007455000000000001 0.28 AML other m 2020-08-04T06:15:42.27
IV.GAVE.EHN. ML:2.0 0.000486 0.24 AML other m 2020-08-04T06:15:42.53
IV.ASSB.HHE. ML:2.0 0.0003625 0.36 AML other m 2020-08-04T06:15:43.35
IV.SNTG.HHN. ML:1.9 0.0002755 0.3 AML other m 2020-08-04T06:15:43.63
IV.SNTG.HHE. ML:1.9 0.00029949999999999996 0.12 AML other m 2020-08-04T06:15:43.51
IV.LNSS.HHE. ML:1.8 0.00022950000000000002 0.84 AML other m 2020-08-04T06:15:43.25
IV.SNTG.HNE. ML:2.0 0.00035499999999999996 0.76 AML other m 2020-08-04T06:15:43.52
IV.SNTG.HNN. ML:2.0 0.0003265 1.16 AML other m 2020-08-04T06:15:44.64
IV.ASSB.HHN. ML:2.0 0.00033999999999999997 0.82 AML other m 2020-08-04T06:15:44.55
IV.EL6.EHN. ML:1.9 0.00025 1.28 AML other m 2020-08-04T06:15:45.74
IV.LNSS.HHN. ML:1.8 0.000225 0.58 AML other m 2020-08-04T06:15:45.35
IV.EL6.EHE. ML:2.0 0.000279 0.96 AML other m 2020-08-04T06:15:45.34
IV.MNTT.EHN. ML:2.2 0.0006299999999999999 0.46 AML other m 2020-08-04T06:15:46.29
IV.ARRO.EHE. ML:1.7 0.0001325 0.18 AML other m 2020-08-04T06:15:46.53
IV.SMA1.EHN. ML:1.6 0.0001605 0.48 AML other m 2020-08-04T06:15:46.79
IV.FOSV.EHE. ML:1.8 0.0001545 0.22 AML other m 2020-08-04T06:15:46.53
IV.FOSV.EHN. ML:2.0 0.0002465 0.34 AML other m 2020-08-04T06:15:46.80
IV.ATCC.EHE. ML:2.0 0.0002525 0.86 AML other m 2020-08-04T06:15:47.47
IV.ATCC.EHN. ML:1.9 0.000215 0.66 AML other m 2020-08-04T06:15:47.15
IV.ARRO.EHN. ML:1.6 0.000115 0.18 AML other m 2020-08-04T06:15:47.46
IV.RM33.EHN. ML:1.5 0.0000851 0.32 AML other m 2020-08-04T06:15:47.60
IV.MNTT.EHE. ML:2.3 0.0007009999999999999 1.18 AML other m 2020-08-04T06:15:47.21
IV.SMA1.EHE. ML:1.6 0.0001515 1.52 AML other m 2020-08-04T06:15:48.02
IV.SSFR.HNN. ML:2.3 0.00039049999999999995 0.66 AML other m 2020-08-04T06:15:51.25
IV.SSFR.HHE. ML:2.0 0.0001915 0.18 AML other m 2020-08-04T06:15:51.38
IV.MURB.HHE. ML:2.3 0.000402 0.62 AML other m 2020-08-04T06:15:51.31
IV.SSFR.HNE. ML:2.2 0.0003355 0.76 AML other m 2020-08-04T06:15:51.39
IV.RM33.HNN. ML:3.0 0.00273 1.06 AML other m 2020-08-04T06:15:51.84
IV.RM33.HNE. ML:3.1 0.003435 1.1 AML other m 2020-08-04T06:15:51.84
IV.SSFR.HHN. ML:2.1 0.00023299999999999997 0.18 AML other m 2020-08-04T06:15:52.17
IV.MURB.HHN. ML:2.2 0.0003165 0.24 AML other m 2020-08-04T06:15:52.73
IV.RM33.EHE. ML:1.5 0.00009695 0.42 AML other m 2020-08-04T06:15:55.21
IV.PIEI.HHN. ML:1.7 0.00005945 0.7 AML other m 2020-08-04T06:15:56.35
IV.PIEI.HHE. ML:1.6 0.000055849999999999996 1.16 AML other m 2020-08-04T06:15:56.04
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
Waveforms Seismic signals in miniseed + resp format Download